Updated on 2025/10/01

写真a

 
IKARASHI KIKUO
 
Organization
School of Environment and Society Professor
Title
Professor
Homepage
http://www.arch.titech.ac.jp/ikarashi_lab/index.html
External link

Degree

  • Master of Engineering ( Tokyo Institute of Technology )

  • Doctor of Engineering ( Tokyo Institute of Technology )

Research Areas

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Building structures and materials

Education

  • Tokyo Institute of Technology   Graduate School, Division of Science and Engineering

    - 1992

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  • 東京工業大学大学院   理工学研究科   建築学

    - 1992

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    Country： Japan

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  • Tokyo Institute of Technology   School of Engineering   Dept. of Architecture and Building Engineering

    - 1989

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    Country： Japan

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Research History

Professional Memberships

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Papers

  • STRENGTH OF BOLTED STEEL STRUCTURAL MEMBERS UNDER ECCENTRIC TENSION

    Hideo HAIKATA, Kikuo IKARASHI, Kazuya MITSUI

    Journal of Structural and Construction Engineering (Transactions of AIJ)   89 ( 820 )   639 - 650   2024.6

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    Publishing type：Research paper (scientific journal)   Publisher：Architectural Institute of Japan  

    DOI： 10.3130/aijs.89.639

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  • Elastic Critical Buckling Coefficients for Skew Plates of Steel Structures under Biaxial Normal Stress

    Kazuya Mitsui, Kikuo Ikarashi, Keiichiro Sada

    Buildings   14 ( 4 )   901 - 901   2024.3

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    Publishing type：Research paper (scientific journal)   Publisher：MDPI AG  

    In steel structures, skew thin steel plates serve as panel zones in structures spanning large spaces (e.g., warehouses and gymnasiums). Considerable research has been conducted on the shear buckling of panels due to seismic loads acting on a structure. Conversely, under snow or wind loads, the panel zone may experience compressive and tensile stresses simultaneously from two directions. Considering the economic preference for thin steel plates, evaluating the elastic critical local buckling stresses in the panel zone under biaxial normal stress may provide essential information to structural engineers. In this study, an elastic buckling analysis based on the energy method is performed to clarify the impact of panel geometry and boundary conditions on the elastic local buckling stresses of skew panel zones. As confirmed from the results, the local buckling stresses calculated using the energy method were consistent with those determined using finite element analysis. The findings indicate that a skew angle of up to 30° marginally affects the elastic buckling stress under uniaxial stress. Consequently, engineer-friendly design formulas were developed based on these findings. Comparisons with previous research demonstrated that the buckling loads reported were generally higher than those determined by finite element analysis. The study also established the correlation of the buckling stresses under biaxial stresses, which implied that the skew angle posed minimal influence on buckling stress for skew plates under biaxial stress. Additionally, a method for evaluating this correlation was presented. Engineers can utilize the provided design equations to more efficiently and accurately calculate buckling loads, facilitating a safer and more economical design of structures with skew plates.

    DOI： 10.3390/buildings14040901

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  • Elastic critical local buckling load and behavior of local buckling for cold‐formed lipped channel steel member under compression

    Kazuya Mitsui, Kikuo Ikarashi

    JAPAN ARCHITECTURAL REVIEW   7 ( 1 )   2024.1

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    Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Abstract

    The objective of this study was to analyze the elastic critical local buckling of cold‐formed lipped channel sections using the energy method. A mechanical model and unique displacement functions simulating the local buckling behavior were proposed to consider the plate element interaction. Using the proposed mechanical mode, an analytical formula for local buckling that directly reflects the parameters of the channel member was proposed. Based on the proposed formula, the relationship between the cross‐sectional geometry and local buckling behavior was investigated. In addition, a simplified design equation was proposed. The reliability and effectiveness of the proposed equations were presented by comparing with the results of eigenvalue analysis based on the finite element method.

    DOI： 10.1002/2475-8876.12432

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  • EFFECT OF LOADING PROTOCOL ON DETERIORATING BEHAVIOR DUE TO LOCAL BUCKLING OF BOX-SECTION STEEL MEMBERS

    Kazuya MITSUI, Itsuki MATSUMOTO, Kikuo IKARASHI

    Journal of Structural and Construction Engineering (Transactions of AIJ)   88 ( 813 )   1569 - 1580   2023.11

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    Publishing type：Research paper (scientific journal)   Publisher：Architectural Institute of Japan  

    DOI： 10.3130/aijs.88.1569

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  • Elastic critical local buckling stress in cold-formed lipped channel and hat sections under uniform compression

    Kazuya Mitsui, Kikuo Ikarashi, Tomoki Kobashi, Ryohei Kuwada

    Thin-Walled Structures   191   111064 - 111064   2023.10

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    Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.tws.2023.111064

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  • ELASTIC LOCAL BUCKLING STRENGTH OF I-SHAPED BEAM WEB PLATES SUBJECTED TO END MOMENTS AND UNIFORMLY DISTRIBUTED LOAD

    Tomoki NAKANO, Kazuya MITSUI, Kikuo IKARASHI

    Journal of Structural and Construction Engineering (Transactions of AIJ)   88 ( 806 )   687 - 698   2023.4

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    Publishing type：Research paper (scientific journal)   Publisher：Architectural Institute of Japan  

    DOI： 10.3130/aijs.88.687

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  • INFLUENCE OF UPPER FLANGE CONTINUOUS RESTRAINT CONDITION ON PLASTIC DEFORMATION CAPACITY OF I-SHAPED BEAMS

    Kikuo IKARASHI, Kazuya MITSUI, Hiroto KAGESAWA, Seiya KIMURA, Mamoru UCHIDA, Kenta HIRAI, Takeshi TAKADA, Fuyuki ITO

    Journal of Structural and Construction Engineering (Transactions of AIJ)   88 ( 805 )   519 - 530   2023.3

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    Publishing type：Research paper (scientific journal)   Publisher：Architectural Institute of Japan  

    DOI： 10.3130/aijs.88.519

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  • Strength of bolted steel structural members under eccentric tension

    Kazuma Nagasato, Kikuo Ikarashi, Kazuya Mitsui

    JAPAN ARCHITECTURAL REVIEW   6 ( 1 )   2023.1

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    Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Abstract

    The effective cross‐sectional area method for the outstanding leg is utilized as an ineffective area to evaluate the strength in the present Japanese design standard. Given that this evaluation method is fundamentally premised on experimental outcomes derived from relatively thick plates, it must be extended to brace members composed of thin plates. In this study, we conduct bolt joint experiments and numerical analyses on thin‐plate angles and channel members, with the aim to elucidate the elements influencing the efficiency of the joint. We propose a unified bolt joint strength evaluation formula that also considers thin‐plate members.

    DOI： 10.1002/2475-8876.12409

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  • Required number of self‐drilling screws for built‐up column comprising cold‐formed lipped channel sections to ensure flexural buckling as a single unit member

    Kazuya Mitsui, Atsushi Sato, Kikuo Ikarashi

    JAPAN ARCHITECTURAL REVIEW   2023.1

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/2475-8876.12354

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  • Elastic Shear Buckling Coefficients for Oblique Plates

    Kazuya Mitsui, Kikuo Ikarashi

    Mathematical Problems in Engineering   2022.9

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1155/2022/9532380

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  • 圧縮力が作用する冷間成形溝形断面部材の弾性ゆがみ座屈耐力と座屈挙動

    三井和也, 五十嵐規矩夫, 小橋知季, 桑田涼平

    日本建築学会構造系論文集   Vol. 87 ( No. 791 )   2022.1

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.3130/aijs.87.139

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  • BUCKLING STRENGTH AND BEHAVIOR OF ELASTIC LOCAL BUCKLING FOR COLD-FORMED CHANNEL MEMBER UNDER COMPRESSION

    Kazuya MITSUI, Kikuo IKARASHI

    Journal of Structural and Construction Engineering (Transactions of AIJ)   86 ( 790 )   1685 - 1692   2021.12

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    Publishing type：Research paper (scientific journal)   Publisher：Architectural Institute of Japan  

    DOI： 10.3130/aijs.86.1685

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  • 引張力を受ける偏心接合された薄板鋼構造部材のボルト接合部耐力

    永里和真, 五十嵐規矩夫, 三井和也

    日本建築学会構造系論文集   Vol. 86 ( No. 789 )   2021.11

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.3130/aijs.86.1570

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  • 薄板軽量形鋼組立圧縮材が一体で曲げ座屈するための必要ドリルねじ本数

    三井和也, 佐藤篤司, 五十嵐 規矩夫

    日本建築学会構造系論文集   Vol. 86 ( No. 784 )   2021.6

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.3130/aijs.86.979

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  • 圧縮力が作用する冷間成形リップ付溝形断面部材の数値解析結果に幾何学的初期不整が及ぼす影響

    三井和也, 渡辺茜, 小橋知季, 五十嵐規矩夫

    日本建築学会構造系論文集   Vol. 86 ( No. 779 )   2021.1

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.3130/aijs.86.157

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  • Local buckling strength and plastic deformation capacity of vertical haunch h-shaped beam under shear bending

    Wataru ISHIDA, Kikuo IKARASHI, Kazuya MITSUI

    Journal of Structural and Construction Engineering   85 ( 778 )   1655 - 1665   2020.12

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Architectural Institute of Japan  

    DOI： 10.3130/AIJS.85.1655

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  • Effect of surrounding frame members on the buckling behavior of steel shear walls restrained by stiffeners

    Kikuo Ikarashi, Hayato Shimomura, Jumpei Yasunaga, Takuya Ueki, Junichiro Ono, Tatsuya Ohyama

    JAPAN ARCHITECTURAL REVIEW   2020.10

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    Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    DOI： 10.1002/2475-8876.12162

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  • Buckling behavior of H-shaped beam with continuous restraint installed transverse stiffeners and method for deciding stiffening position

    Naoki Igawa, Kikuo Ikarashi, Kazuya Mitsui

    Journal of Structural and Construction Engineering   85 ( 777 )   1491 - 1501   2020

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Architectural Institute of Japan  

    DOI： 10.3130/AIJS.85.1491

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  • EVALUATION METHOD OF ULTIMATE STRENGTH FOR L-SHAPED BEAM-TO-COLUMN JOINT PANELS COMPOSED WITH I-SHAPED MEMBERS

    Kikuo IKARASHI, Yuichi UTSUKI, Kazuya MITSUI, Yuta MAKINO, Kaoru YAMADA

    Journal of Structural and Construction Engineering (Transactions of AIJ)   85 ( 774 )   1079 - 1089   2020

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    Publishing type：Research paper (scientific journal)   Publisher：Architectural Institute of Japan  

    DOI： 10.3130/aijs.85.1079

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  • BUCKLING BEHAVIOR OF WEB STIFFENED BY LONGITUDINAL STIFFENERS AND DESIGN METHOD FOR LONGITUDINAL STIFFENERS Reviewed

    Kikuo IKARASHI, Naoki IGAWA, Yoshihiro YANAGISHITA, Kazuya MITSUI

    Journal of Structural and Construction Engineering (Transactions of AIJ)   85 ( 773 )   957 - 967   2020

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    Publishing type：Research paper (scientific journal)   Publisher：Architectural Institute of Japan  

    DOI： 10.3130/aijs.85.957

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  • ELASTIC SHEAR BUCKLING STRENGTH OF L-SHAPED BEAM-TO-COLUMN JOINT PANELS COMPOSED WITH I-SHAPED MEMBERS

    Kikuo IKARASHI, Yuichi UTSUKI, Kazuya MITSUI

    Journal of Structural and Construction Engineering (Transactions of AIJ)   85 ( 771 )   759 - 769   2020

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    Publishing type：Research paper (scientific journal)   Publisher：Architectural Institute of Japan  

    DOI： 10.3130/aijs.85.759

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  • Study on elastic shear buckling of trapezoidal corrugated steel web

    Tao Wang, Kikuo Ikarashi

    Journal of Structural and Construction Engineering   83 ( 750 )   1193 - 1203   2018.8

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Architectural Institute of Japan  

    DOI： 10.3130/aijs.83.1193

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  • ELASTIC BUCKLING STRENGTH OF STEEL SANDWICH PANELS UNDER OUT-OF-PLANE BENDING

    IKARASHI Kikuo, INABA Toru

    Journal of Structural and Construction Engineering (Transactions of AIJ)   82 ( 733 )   475 - 483   2017

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    Language：Japanese   Publisher：Architectural Institute of Japan  

     In a sandwich structure having a thin plate, it is of critical importance to understand the buckling behavior of the surface material. The purpose of this studyis to seek to clarify the elastic buckling strength of steel sandwich panels under out-of-plane bending and evaluate it by simple formula. For this purpose, byextending the previous theory for in-plane compression, the authors propose a theory for the elastic buckling strength of steel sandwich panels underout-of-plane bending. Furthermore, the authors analyze effect of material properties of core and skin, shape of steel sandwich panel on elastic bucklingstrength under out-of-plate bending, and propose simple formula for evaluating it.

    DOI： 10.3130/aijs.82.475

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  • LOCAL BUCKLING BEHAVIOR AND EVALUATION METHOD FOR STRUCTURAL PERFORMANCE OF SQUARE HOLLOW SECTION MEMBERS UNDER BENDING SHEAR FORCE

    SATO Kosuke, IKARASHI Kikuo

    Journal of Structural and Construction Engineering (Transactions of AIJ)   82 ( 731 )   123 - 133   2017

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    Language：Japanese   Publisher：Architectural Institute of Japan  

    &nbsp;Square hollow section members such as square steel tube members and box section members are commonly used as columns in structural steel buildings. Their structural performance during earthquakes significantly affects the seismic capacities of the buildings. The square hollow section members used as columns are subjected to bending shear force during earthquakes. Local buckling determines their large deformation behavior, except for fracture. Therefore, it is necessary to investigate the large deformation behavior of the members under bending shear force governed by local buckling for an accurate evaluation of the seismic capacities of the buildings. Although numerous studies have been conducted on the local buckling of the members under bending shear force, the local buckling determinant is not sufficiently understood. Various factors affect the large deformation behavior of the members. The effect of member shapes and loading conditions and the effect of material and geometric imperfections on the large deformation behavior under bending shear force have not been sufficiently investigated. Consequently, the ultimate strength and plastic deformation capacity of the members under bending shear force have not been systematically evaluated as a function of member shapes and loading conditions.<br>&nbsp;Given this background, this study aimed to investigate the large deformation behavior of the square hollow section members under bending shear force governed by local buckling and evaluate the ultimate strength and plastic deformation capacity as a function of member shapes and loading conditions.<br>&nbsp;First, for the evaluation of the ultimate strength and plastic deformation capacity of the members, the elastic local buckling strength under bending shear force was shown. A new normalized width-thickness ratio SH based on the elastic local buckling strength and full plastic strength was proposed.<br>&nbsp;Then, after understanding the elastic local buckling behavior purely determined by member shapes and loading conditions, the large deformation behavior of the members under monotonic bending shear force was examined using numerical analysis and structural testing. The effect of initial imperfections and the effect of loading conditions on the large deformation behavior were shown. The ultimate strength and plastic deformation capacity were evaluated using the normalized width-thickness ratio SH based on the elastic local buckling strength. The evaluation expressions derived from this study enable the reasonable prediction of the ultimate strength and plastic deformation capacity under bending shear force as a function of member shapes and loading conditions.<br>&nbsp;Finally, after examining the large deformation behavior under monotonic bending shear force, the large deformation behavior of the members under cyclic bending shear force was examined using structural testing. Cyclic loading decreases the plastic deformation capacity under bending shear force. However, most of the ultimate strength and plastic deformation capacity under cyclic bending shear force can be evaluated using the evaluation expressions derived from this study. The expressions were derived via the conservative analysis where initial deflections by buckling mode were used as the most unfavorable initial imperfections.

    DOI： 10.3130/aijs.82.123

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  • LOCAL BUCKLING STRENGTH OF UNIFORMLY COMPRESSED OCTAGONAL THIN WALLED SECTION MEMBERS

    KOBASHI Tomoki, NAKAYASU Nariaki, SHIMIZU Nobutaka, KANNO Ryoichi, IKARASHI Kikuo

    Journal of Structural and Construction Engineering (Transactions of AIJ)   82 ( 735 )   713 - 722   2017

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    Language：Japanese   Publisher：Architectural Institute of Japan  

    &nbsp;Cold-formed steel members are widely applied in columns and other axial members in steel structures. One of the key issues in design of cold formed steel is local buckling strength under axial compression. As a means to avoid premature local buckling, we have paid on attention to the application of octagonal section members. The local buckling behavior of octagonal section members have been investigated by many researchers. However, these studies have focused mainly on regular octagonal sections and do not considered the restraining effect between adjacent plate elements. In this paper, we conducted numerical analysis (Finite Strip Analysis and Finite Element Analysis) and stab column tests, to investigate the elastic buckling strength and post buckling strength of octagonal section members where the adjacent plate elements have different width-thickness ratios.<br>&nbsp;First, we conducted Finite Strip Analysis to investigate the elastic buckling strength of octagonal section members. Through these numerical analysis, it was found that the octagonal section members generally showed higher strength than that of simply supported plate. These strength increases were depended on the difference of the width-thickness ratio between adjacent plate elements and the change of buckling mode.<br>&nbsp;Second, we examined the post buckling strength of octagonal section members through a stab-column compression test. We compared the post buckling strength of square section and that of octagonal section, and found that the post buckling strengths of octagonal section members was higher than those of square section members, when they have a same diameter. In addition, it was known that the post buckling strength of octagonal section members could be evaluated by the traditional effective-width method, where simply supported conditions were assumed.<br>&nbsp;Finally, we investigated the post buckling strength of each plate elements of octagonal section members whose adjacent plate elements have different widths by Finite Element Analysis. The post buckling strength of the plate elements with a large width was higher than of square section member. On the other hand, the post buckling strength of the plate elements with a small width was lower than that of square section member. These increase and decrease were dependent on the restraining effect between adjacent plate elements. Because of this trade-off effect between the adjacent plate elements, the effective width method, which regarded each plate elements as a simply supported plate, gave a good estimation about post buckling strength of the octagonal section members.

    DOI： 10.3130/aijs.82.713

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  • BUCKLING MODE AND PLASTIC DEFORMATION CAPACITY OF WEB-TAPERED H-SHAPED STEEL BEAMS UNDER CYCLIC SHEAR BENDING

    IKARASHI Kikuo, YOSHIZAWA Katsuhito, HASEGAWA Ryuta

    Journal of Structural and Construction Engineering (Transactions of AIJ)   82 ( 735 )   723 - 733   2017

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    Language：Japanese   Publisher：Architectural Institute of Japan  

    &nbsp;Web-tapered tapered H-shaped beams, which have a continuous reduction in section, have been utilized in steel-frame structures for more efficient utilization of structural materials. On the other hand, section stiffness decreases along a beam's axis, and the member stress increases. For this reason, it is more important to investigate the buckling behavior and the progress of the plasticity of a tapered H-shaped beam than that of a uniform H-shaped beam.<br>&nbsp;In the past, the authors investigated elastic plate buckling strength and lateral torsional buckling strength using an energy method and numerical analysis. An estimation method and formula were proposed in those research studies.<br>&nbsp;This study examines the inelastic buckling strength and plastic deformation capacity of Web-tapered H-shaped beams with depth tapered through by a cyclic loading test and numerical analysis. Twelve tapered beams and five normal straight beams were tested. The cyclic behavior and collapse mode of these specimens were investigated. In addition, multiple simulations using numerical analyses were carried out. Then, the collapse mode and plastic deformation capacity of the tapered beam were evaluated by using indexes that were determined on the basis of the elastic buckling strength.<br>&nbsp;First, it is clear that the behavior and collapse mode of tapered beams are changed by the following characteristics: taper gradient, flange plate slenderness, web plate slenderness, and lateral bracing length. The skeleton curves of each specimen are taken from the load-displacement relationships obtained by a cyclic loading test. Using these skeleton curves, the effects of a tapered gradient on the performance of an H-section beam are examined. The value of the plastic deformation capacities of beams collapsed by web plate buckling or lateral torsional buckling are estimated from the eigenvalue of each tapered beam. This means that the plastic deformation capacity increases when the eigenvalue is higher. On the other hand, the values of the plastic deformation capacity of a beam collapsed by flange plate buckling are almost the same without regard to its own eigenvalue. Because the flange plate buckling strength decreases when the tapered gradient is steep, and plastic reason in flange is longer.<br>&nbsp;Second, the effect of a cyclic load on tapered beams is considered. It is evident that beams with low plate slenderness and large plastic deformation capacity are affected by cyclic loads. That value The plastic deformation capacity of these beams decreases by cyclic loading.<br>&nbsp;Third, the authors propose a new plate buckling slenderness index (WF&gamma;) and lateral buckling slenderness index (&gamma;b). These slenderness indexes are obtained from the elastic buckling strength. It is clear that the collapse mode of a tapered beam can be classified using these indexes. In the range of WF&gamma; / &gamma;b > 2.4, the collapse mode is plate local buckling, and in the range of WF&gamma; / &gamma;b < 2.4, the collapse mode is lateral torsional buckling.<br>&nbsp;Finally, the maximum strengths and plastic deformation capacities of tapered beams are estimated by using the plate buckling slenderness index and lateral buckling slenderness index when the collapse mode of tapered beams is classified by these indexes. The elastic buckling strength of the tapered beams do not decrease as a result of the coupled instability effect between the plate local buckling and lateral torsional buckling. However, the maximum strength and the plastic deformation capacity decrease as a result of these effects.

    DOI： 10.3130/aijs.82.723

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  • ELASTIC BUCKLING STRENGTH OF H-SHAPED TAPERED BEAM-COLUMNS UNDER AXIAL AND BENDING SHEAR FORCE

    IKARASHI Kikuo, HASEGAWA Ryuta

    J. Struct. Constr. Eng.   80 ( 716 )   1599 - 1609   2015

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    Language：Japanese   Publisher：Architectural Institute of Japan  

    Tapered H-shaped beam-columns have been used in steel frame structures from the perspective of reduction of the weight of steel frame and improvement of economy. On the other hand, section stiffness of tapered beam-columns is weaker and stress within tapered beam-columns is greater than uniform beam-columns. For this reason, it is important to grasp elastic buckling behavior of tapered beam-columns.<br> This study targets H-shaped beam-columns with web depth tapered under axial and bending shear force, and is intended to reveal elastic local and overall buckling behavior. First, stress distribution within tapered beam-columns is cleared, and elastic buckling strength is derived by theoretical analysis with energy method using the stress distribution. Based on the analysis result, evaluation method of elastic buckling strength of H-shaped tapered beam-columns is proposed.

    DOI： 10.3130/aijs.80.1599

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    Other Link： https://jlc.jst.go.jp/DN/JLC/20017326627?from=CiNii

  • Cyclic Behavior of Corrugated Steel Shear Diaphragms with End Failure Reviewed

    Nobutaka Shimizu, Ryoichi Kanno, Kikuo Ikarashi, Keiichi Sato, Koji Hanya

    JOURNAL OF STRUCTURAL ENGINEERING-ASCE   139 ( 5 )   796 - 806   2013.5

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1061/(ASCE)ST.1943-541X.0000669

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  • Stress separation concept for plate buckling strength under flexural-shear and axial force Reviewed

    Takuya Suzuki, Kikuo Ikarashi

    JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH   70   317 - 325   2012.3

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.jcsr.2011.10.003

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  • ALLOWABLE STRENGTH AND CYCLIC CHARACTERISTIC CONSIDERING OF STRESS CONCENTRATION OF PERFORATED BEAM MADE OF HIGH STRENGTH STEEL Reviewed

    IKARASHI Kikuo, ISHIHARA Tadashi, IGURO Fumihiko

    Transactions of AIJ   77 ( 675 )   755 - 763   2012

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    Language：Japanese   Publisher：日本建築学会  

    This study researches how stress concentration has an effect on cyclic behavior of H-shaped beam with web perforation made of high strength steel &amp;ldquo;H-SA700&amp;rdquo;. It is examined and compared with the same shaped beam made of &amp;ldquo;SN400&amp;rdquo; by cyclic loading tests. Cyclic elastic deformation of H-SA700 increases even under constant-amplitude cyclic loading. This property may amplify the local plasticity near a circular hole. So new yield strength, &lt;i&gt;Q&lt;sub&gt;c&lt;/sub&gt;&lt;/i&gt; and &lt;i&gt;Q&lt;sub&gt;F&lt;/sub&gt;&lt;/i&gt;, by means of elastic theory of stress concentration, are suggested. &lt;i&gt;Q&lt;sub&gt;c&lt;/sub&gt;&lt;/i&gt; is a minimum strength when somewehre in a hole edge will be plastic. Similarly &lt;i&gt;Q&lt;sub&gt;F&lt;/sub&gt;&lt;/i&gt; is a minimum strength in a minimum section. In addition large deformation behavior of H-SA700 is shown.

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  • Effects of boundary conditions and end moment ratio on elastic lateral buckling strength of H-shaped beams Reviewed

    Kikuo Ikarashi, Nobuyuki Tomo, Tao Wang

    Journal of Structural and Construction Engineering   76 ( 670 )   2173 - 2181   2011.12

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.3130/aijs.76.2173

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  • Post Local Buckling Behavior and Ultimate Capacity of H-section Beam Reviewed

    Tao Wang, Kikuo Ikarashi

    JOURNAL OF ASIAN ARCHITECTURE AND BUILDING ENGINEERING   10 ( 2 )   429 - 436   2011.11

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    Language：English   Publishing type：Research paper (scientific journal)  

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  • Evaluation of plastic deformation capacity of H-shaped steel beams with the newly proposed limitation value of plate slenderness Reviewed

    Kikuo Ikarashi, Ryota Suekuni, Takuma Shinohara, Tao Wang

    Journal of Structural and Construction Engineering   76 ( 668 )   1865 - 1872   2011.10

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.3130/aijs.76.1865

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  • Evaluation of single buckling and coupled buckling load of columns in braced frame Reviewed

    Tao Wang, Kikuo Ikarashi

    Journal of Structural and Construction Engineering   76 ( 661 )   675 - 684   2011.3

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.3130/aijs.76.675

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  • Elasto-plastic deformation behavior of corrugated steel diaphragm under cyclic shear load Reviewed

    Nobutaka Shimizu, Tadayoshi Okada, Kikuo Ikarashi

    Journal of Structural and Construction Engineering   75 ( 655 )   1745 - 1754   2010.9

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.3130/aijs.75.1745

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  • A study on post shear buckling behavior in corrugated steel plate Reviewed

    Nobutaka Shimizu, Tadayoshi Okada, Kikuo Ikarashi

    Journal of Structural and Construction Engineering   75 ( 651 )   1013 - 1020   2010.5

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.3130/aijs.75.1013

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  • Elasto-plastic buckling behavior of h-shaped beam with large depth-thickness ratio under cyclic loading

    Tao Wang, Kikuo Ikarashi

    Proceedings of SDSS' Rio 2010: International Colloquium Stability and Ductility of Steel Structures   1   377 - 384   2010

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    Language：English   Publishing type：Research paper (international conference proceedings)  

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  • Strength estimation of end failures in corrugated steel shear diaphragms

    Nobutaka Shimizu, Kikuo Ikarashi

    Proceedings of SDSS' Rio 2010: International Colloquium Stability and Ductility of Steel Structures   2   1043 - 1050   2010

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  • A Fundamental Study on the Effect of Binding Section in Tensional Properties of Steel

    SETO Kohei, SUZUKI Toshiro, IKARASHI Kikuo, KANEKO Hirofumi

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 2000 )   407 - 408   2000.7

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  • A Study on Statical Characteristics of Concrete-Filled Circular Tubular Branch Joints : Part 2 Evaluation of Strength Cosidered Stress Condition in Branch Joint

    KASHIMURA Toshiya, SUZUKI Toshiro, IKARASHI Kikuo, KANEKO Hirofumi, HIGUCHI Mitsuru, HIRADE Tohru, KIKUCHI Takeshi

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1999 )   701 - 702   1999.7

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  • A Study on Plastic Deformation Capacity of H-shaped High Strength Steel Beams connected to Box Column : Part3. Effect of Beams Section Form on Plastic Deformation Capacity

    TAMURA Kinya, SUZUKI Toshiro, IKARASHI Kikuo, AZUMA Takeshi, NAKAZAWA Satoshi

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1999 )   505 - 506   1999.7

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  • A Study on Structural Properties of Truss Beams with Shear Panels : Part 2 Effect of Shear Panels on Structural Properties

    IMAI Ichiro, SUZUKI Toshiro, IKARASHI Kikuo, ISHIHARA Tadashi

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1999 )   429 - 430   1999.7

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  • A Study on Structural Properties of Truss Beams with Shear Panels : Part 3 Truss Beams under Cyclic Loading

    IKARASHI Kikuo, SUZUKI Toshiro, IMAI Ichiro, ISHIHARA Tadashi

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1999 )   431 - 432   1999.7

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  • A Study on Lateral Buckling Behavior of H-shaped Beams with Bracing on Tensile Flange

    ONISHI Ko, SUZUKI Toshiro, IKARASHI Kikuo, SUZUKI Ritsu

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1999 )   423 - 424   1999.7

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  • A Study on Structural Properties of Truss Beams with Shear Panels : Part 1 Experiment Outline and Primary Structural Properties

    ISHII Hideaki, SUZUKI Toshiro, IKARASHI Kikuo, IMAI Ichiro, ISHIHARA Tadashi

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1999 )   427 - 428   1999.7

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  • A Study on Estimate for Plastic Deformation Capacity of Steel Members Reflected Meterial Properties

    SATSUKAWA Keiichi, SUZUKI Toshiro, IKARASHI Kikuo

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1999 )   413 - 414   1999.7

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  • A Study on Statical Characteristics of Concrete-Filled Circular Tubular Branch Joints : Part 1 Influence of Form in Branch Joint

    NAKAZAWA Tetsuya, SUZUKI Toshiro, IKARASHI Kikuo, KANEKO Hirofumi, HIGUCHI Mitsuru, HIRADE Tohru, KIKUCHI Takeshi

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1999 )   699 - 700   1999.7

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  • Behavior of Branch Joint of Steel Truss : Part2 Influence of Diameter Ratio, Radius Thickness Ratio and Axial Force for Concrete Filled Type

    KIKUCHI Takeshi, SUZUKI Toshiro, IKARASHI Kikuo, KANEKO Hirofumi, HIGUCHI Mitsuru, HIRADE Tohru, LEE Seidai

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1998 )   715 - 716   1998.7

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  • The Influence of Material Properties on The Plastic Deformation Capacity of Steel Members : Part 2 Sampling Method of Factor to Estimate of Plastic Deformation Capacity and Estimate of Plastic Deformation Capacity

    SATSUKAWA Keiichi, SUZUKI Toshiro, IKARASHI Kikuo

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1998 )   613 - 614   1998.7

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  • Behavior of Branch Joint of Steel Pipe Truss : (Part1.)Effect of Concrete Filled in Main Pipe

    NAKAZAWA Tetsuya, SUZUKI Toshiro, IKARASHI Kikuo, KANEKO Hirofumi, HIGUCHI Mitsuru, HIRADE Tohru, LEE Seidai

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1998 )   713 - 714   1998.7

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  • A Study on Plastic Deformation Capacity of 590N/mm^2 High Strength Steel Beams with Large Depth-thickness Ratio : part2 Evaluation of Plastic Deformation Capacity and Effect of the Material Property on the Plastic Deformation Capacity

    ISHII Hideaki, SUZUKI Toshiro, IKARASHI Kikuo, AZUMA Takeshi, KOGURE Kosuke

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1998 )   607 - 608   1998.7

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  • The Influence of Material Properties on The Plastic Deformation Capacity of Steel Members : Part 1 Investgation of Material Properties in Plastic Region

    IKARASHI Kikuo, SUZUKI Toshiro, SATSUKAWA Keiichi

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1998 )   611 - 612   1998.7

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  • Influence of Shear Stress on Local Buckling Behavior and Plastic Deformation Capacity of H-shaped Steel Beams

    YAMAZAKI Junko, SUZUKI Toshiro, IKARASHI Kikuo, SUEOKA Toshiyuki

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1998 )   603 - 604   1998.7

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  • A Study on Plastic Deformation Capacity of 590N/mm^2 High Strength Steel Beams with Large Depth-thickness Ratio : part1 Properties of Local Buckling

    SUZUKI Ritsu, SUZUKI Toshiro, IKARASHI Kikuo, AZUMA Takeshi, KOGURE Kosuke

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1998 )   605 - 606   1998.7

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  • A Study on Plastic Deformation Capacity of H-Shaped High Strength Steel Beams connected to Box Column : Part1. An outline of Experiment And Collapse Forms

    AZUMA Takeshi, SUZUKI Toshiro, IKARASHI Kikuo, YOSHINARI Yutaka

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1998 )   369 - 370   1998.7

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  • A Study on Plastic Deformation Capacity of H-Shaped High Strength Steel Beams connected to Box Column : Part2. Effect of Plate Thickness on Plastic Deformation Capacity

    NAKAZAWA Satoshi, SUZUKI Toshiro, IKARASHI Kikuo, AZUMA Takeshi, YOSHINARI Yutaka

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1998 )   371 - 372   1998.7

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  • Study on stiffness and bending strength of Cross-H shaped steel-Concrete without covering concrete : Part1 Influence of the place of stiffener

    HORI Yasuhiro, SUZUKI Toshro, IGARASHI Kikuo, MIYASHITA Shin-ichi

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1998 )   1053 - 1054   1998.7

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  • Study on stiffness and bending strenght of Cross-H shaped Steel-Concrete without covering concrete : Part2 SC column without concrete in the midspan

    MIYASHITA Shin-ichi, SUZUKI Toshiro, IGARASHI Kikuo, HORI Yasuhiro

    Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   ( 1998 )   1055 - 1056   1998.7

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Books

  • Recommendation for Plastic Design of Steel Structures

    2010 

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  • 鋼構造塑性設計指針 第２版

    日本建築学会  2010 

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  • 鋼構造座屈設計指針(2009改定版）

    日本建築学会  2009 

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  • Recommendation for Stability Design of Steel Structures (Rev.2009)

    2009 

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  • 鋼構造設計規準ー許容応力度設計法ー

    日本建築学会  2005 

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MISC

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Presentations

  • Coupled Buckling Strength of H-Shaped Beams under Bending and Shear

    Journal of Constructional Steel  2007 

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  • A Method for Evaluation of Elastic Buckling Strength of H Shaped Steel Member under Shear Bending

    Forth International Conference on Urban Earthquake Engineering  2007 

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    Presentation type：Poster presentation  

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  • 異なる復元力特性が混在するハイブリッド構造のDs値 その3 地震応答解析に基づくDs値の評価

    日本建築学会学術講演梗概集  2008 

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  • A Method for Evaluation of Elastic Buckling Strength of H Shaped Steel Member under Shear Bending

    Forth International Conference on Urban Earthquake Engineering  2007 

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  • 異なる復元力特性が混在するハイブリッド構造のDs値 その1 ハイブリッド構造の静載荷実験

    日本建築学会学術講演梗概集  2008 

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  • 異なる復元力特性が混在するハイブリッド構造のDs値 その2 ハイブリッド構造の履歴特性と既存のDs評価式の特性と修正BCJ評価式の提案

    日本建築学会学術講演梗概集  2008 

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  • 波形鋼板のせん断座屈耐力評価法

    日本建築学会学術講演梗概集  2008 

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  • 水平補剛剛性を考慮した骨組内柱材の座屈解析

    日本建築学会学術講演梗概集  2008 

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  • 中間材を導入した鋼管ﾄﾗｽ梁の構造特性に関する研究

    日本建築学会大会学術講演梗概集  1993 

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  • 異種鋼材を用いたH形鋼柱部材の塑性変形性状に関する研究

    日本建築学会大会学術講演梗概集  1993 

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  • フランジを局部座屈補剛した鋼構造柱部材の塑性変形性状に関する研究

    日本建築学会大会学術講演梗概集  1993 

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  • ウェブ補強したH型鋼梁部材の塑性変形性状に関する研究

    日本建築学会大会学術講演梗概集  1993 

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  • 異種鋼材を用いたH形鋼柱部材の塑性変形性状に関する研究:その1 柱部材載荷実験

    日本建築学会大会学術講演梗概集  1994 

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  • 中立軸上に高張力鋼板を添接したH形鋼柱部材の塑性変形性状

    日本建築学会大会学術講演梗概集  1994 

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  • 降伏比が異なる高張力鋼梁の塑性変形能力:その1基本的性状

    日本建築学会大会学術講演梗概集  1995 

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  • 異種鋼材を用いたH形鋼柱部材の塑性変形性状に関する研究:その2 塑性変形性能評価

    日本建築学会大会学術講演梗概集  1994 

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  • 局部座屈及び破断の相互効果で決定づけられる高張力鋼梁の塑性変形能力

    日本建築学会大会学術講演梗概集  1995 

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  • 降伏比が異なる高張力鋼梁の塑性変形能力:その2塑性変形能力評価

    日本建築学会大会学術講演梗概集  1995 

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  • Experimental and Theoretical Study of a Single Layer Reticulated Dome

    1991 

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  • 高降伏点鋼はり部材の塑性変形性能改善に関する研究

    日本建築学会大会学術講演梗概集  1992 

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  • Experimental and Theoretical Study of a Single Layer Reticulated Dome

    1991 

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  • 中間材を導入した鋼管ﾄﾗｽ梁の塑性変形能力に関する実験研究

    日本建築学会大会学術講演梗概集  1992 

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  • H形断面はり部材の横座屈耐力向上に関する研究

    日本建築学会大会学術講演梗概集  1992 

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  • 鉄骨はり部材の塑性変形性能改善に関する研究:その2解析

    日本建築学会大会学術講演梗概集  1992 

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  • 鉄骨はり部材の塑性変形性能改善に関する研究:その1実験

    日本建築学会大会学術講演梗概集  1992 

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  • A STUDY ON LOCAL BUCKLING BEHAVIOR OF HYBRID BEAMS

    1992 

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  • A STUDY ON LOCAL BUCKLING BEHAVIOR OF HYBRID BEAMS

    1992 

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  • ウェブ補強したH形鋼柱部材の塑性変形性状に関する研究

    日本建築学会大会学術講演梗概集  1993 

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  • 剛接合単層トラスドームの座屈実験

    日本建築学会大会学術講演梗概集  1990 

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  • Adaptive Grid Method による有限要素流れ解析

    日本建築学会大会学術講演梗概集  1989 

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  • 鋼構造部材を構成する板要素の局部座屈に対する相互作用に関する研究:その1 概要および短柱実験

    日本建築学会大会学術講演梗概集  1991 

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  • 剛接合単層トラスドームの弾塑性座屈解析

    日本建築学会大会学術講演梗概集  1990 

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  • 鋼構造部材を構成する板要素の局部座屈に対する相互作用に関する研究:その3 数値解析による一般性状

    日本建築学会大会学術講演梗概集  1991 

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  • 鋼構造部材を構成する板要素の局部座屈に対する相互作用に関する研究:その2 はり曲げ実験

    日本建築学会大会学術講演梗概集  1991 

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  • Plastic Deformation Capacity and Post Buckling Behavior of H窶鉄haped Beam with Large Depth-Thickness Ratio under Cyclic Loading

    2010 

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  • CYCLIC BEHAVIOR AND COLLAPSE MODE OF HIGH STRENGTH STEEL H-SECTION BEAMS

    JOINT CONFERENCE PROCEEDINGS 7th International Conference on Urban Earthquake Engineering (7CUEE) & 5th International Conference on Earthquake Engineering (5ICEE)  2010 

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  • A Study on Influence of Shear Stress on Plate Coupled Instbility and Plastic Deformation Capacity of H-shaped Steel Beams

    2000 

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  • A Study on Influence of Shear Stress on Plate Coupled Instbility and Plastic Deformation Capacity of H-shaped Steel Beams

    2000 

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  • ウェブ片面に添接された補強の有効性 ―鋼梁の開口部補強構造 その3

    日本建築学会大会学術講演会  2001 

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  • 開口梁のせん断力伝達機構 ―鋼梁の開口部補強構造 その2

    日本建築学会大会学術講演会  2001 

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  • 実施設計に伴う補強構造の確認実験 ―鋼梁の開口部補強構造 その5

    日本建築学会大会学術講演会  2001 

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  • 様々な開口に対する補強の可能性 ―鋼梁の開口部補強 その4

    日本建築学会大会学術講演会  2001 

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  • 中立軸補強によるＨ形鋼梁の塑性変形性能の改善 ―Ｈ形鋼梁に対する中立軸補強 その2

    日本建築学会大会学術講演会  2001 

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  • Ｈ形鋼梁に対する中立軸補強

    日本建築学会大会学術講演会  2001 

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  • 偏心曲げを受ける鋼梁の横座屈性状 ―その1 H形鋼梁の横座屈性状

    日本建築学会大会学術講演会  2001 

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  • 中立軸補強の有効性に関する確認実験 ―Ｈ形鋼梁に対する中立軸補強 その3

    日本建築学会大会学術講演会  2001 

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  • 鋼材の引張性状に及ぼす断面拘束の影響に関する基礎的研究

    日本建築学会大会学術講演会  2000 

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  • ウェブに鋼板を添接したウェブ幅厚比の大きなH形鋼梁の塑性変形性能に関する研究 （その２ 補強鋼板をウェブの片面に添接した場合の影響）

    日本建築学会大会学術講演会  2000 

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  • ウェブに鋼板を添接したウェブ幅厚比の大きなH形鋼梁の塑性変形性能に関する研究 （その１ ウェブ補強の効果）

    日本建築学会大会学術講演会  2000 

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  • せん断応力度の影響を考慮したH形鋼梁の塑性変形能力評価 （その２ 塑性変形能力評価）

    日本建築学会大会学術講演会  2000 

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  • せん断応力度の影響を考慮したH形鋼梁の塑性変形能力評価 （その１ ウェブ幅厚比の大きな梁の塑性変形性状）

    日本建築学会大会学術講演会  2000 

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  • 開口補剛した有孔H形鋼梁の塑性変形能力に関する研究 （その１ 開口補剛形式の提案とその基本的概念）

    日本建築学会大会学術講演会  2000 

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  • モーメント勾配を考慮した鋼構造部材の塑性変形能力評価

    日本建築学会大会学術講演会  2000 

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  • 高力ボルト摩擦接合されたH形鋼梁継手部の耐力と変形性状に関する研究 （その１ 実験概要および基本性状）

    日本建築学会大会学術講演会  2000 

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  • 開口補剛した有孔H形鋼梁の塑性変形能力に関する研究 （その２ 補剛形式の具現化とその効果）

    日本建築学会大会学術講演会  2000 

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  • 高力ボルト摩擦接合されたH形鋼梁継手部の耐力と変形性状に関する研究 （その２ すべり耐力評価）

    日本建築学会大会学術講演会  2000 

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  • せん断パネルを配置した偏心トラス梁の力学性状に関する研究 (その１ 実験概要及び基本性状）

    日本建築学会大会学術講演会  1999 

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  • 引張側フランジに補剛材を設けたＨ形鋼梁の横座屈性状に関する研究

    日本建築学会大会学術講演会  1999 

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  • せん断パネルを配置した偏心トラス梁の力学性状に関する研究 (その３ 繰返し性状）

    日本建築学会大会学術講演会  1999 

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  • せん断パネルを配置した偏心トラス梁の力学性状に関する研究 (その２ せん断パネルを配置することの効果）

    日本建築学会大会学術講演会  1999 

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  • コンクリート充填円形鋼管分岐継手部の力学性状に関する研究 (その１ 分岐継手部の形状の影響について）

    日本建築学会大会学術講演会  1999 

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  • 角形断面柱に接合される高張力鋼梁の塑性変形性能に関する研究 (その３. 梁断面形状が塑性変形能力に与える影響）

    日本建築学会大会学術講演会  1999 

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  • THE INFLUENCE OF MATERIAL PROPERTIES ON THE DEFORMATION CAPACITY OF STEEL MEMBERS

    1999 

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  • :コンクリート充填円形鋼管分岐継手部の力学性状に関する研究 (その２ 分岐継手部の応力状態を考慮した耐力評価）

    日本建築学会大会学術講演会  1999 

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  • 偏心接合部にせん断パネルを挿入したトラス平板の繰返し挙動に関する研究

    日本建築学会大会学術講演会  2000 

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  • THE INFLUENCE OF MATERIAL PROPERTIES ON THE DEFORMATION CAPACITY OF STEEL MEMBERS

    1999 

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  • せん断応力の影響が大きなH形鋼梁の局部座屈挙動と塑性変形性状

    日本建築学会大会学術講演梗概集  1998 

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  • ウェブ幅厚比の大きな590N/mm2級高張力鋼梁の塑性変形能力に関する研究（その２ 塑性変形能力評価と材料特性が塑性変形能力に及ぼす影響）

    日本建築学会大会学術講演梗概集  1998 

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  • ウェブ幅厚比の大きな590N/mm2級高張力鋼梁の塑性変形能力に関する研究（その１ 局部座屈発生性状）

    日本建築学会大会学術講演梗概集  1998 

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  • 鋼構造部材の塑性変形能力に及ぼす鋼素材特性の影響（その２ 塑性変形能力評価因子の抽出方法と塑性変形能力評価）

    日本建築学会大会学術講演梗概集  1998 

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  • 鋼構造部材の塑性変形能力に及ぼす鋼素材特性の影響（その１ 塑性化領域における鋼素材特性の検討）

    日本建築学会大会学術講演梗概集  1998 

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  • 円形鋼管トラス分岐継手部の性状について（その２ コンクリート充填タイプの管径比、径厚比、軸力の影響）

    日本建築学会大会学術講演梗概集  1998 

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  • 円形鋼管トラス分岐継手部の性状について（その１ 主管の充填コンクリートの効果）

    日本建築学会大会学術講演梗概集  1998 

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  • かぶりなし十字型鉄骨コンクリート柱部材の剛性及び耐力に関する研究（その２. 端部のみにコンクリートを打設した場合）

    日本建築学会大会学術講演梗概集  1998 

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  • かぶりなし十字型鉄骨コンクリート柱部材の剛性及び耐力に関する研究（その１. スチフナ位置による影響）

    日本建築学会大会学術講演梗概集  1998 

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  • 鋼素材特性を反映させた鋼構造部材の塑性変形能力評価に関する研究

    日本建築学会大会学術講演会  1999 

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  • ウエブ幅厚比の大きな高張力鋼梁の塑性変形性状に関する研究（その１ 研究目的及び概要)

    日本建築学会大会学術講演梗概集  1997 

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  • スカラップを有する高張力鋼梁の塑性変形能力に関する研究（その2. 塑性変形能力に及ぼす断面形状の影響)

    日本建築学会大会学術講演梗概集  1997 

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  • ウエブ幅厚比の大きな高張力鋼梁の塑性変形性状に関する研究（その３ 崩壊形式と塑性変形能力評価)

    日本建築学会大会学術講演梗概集  1997 

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  • ウエブ幅厚比の大きな高張力鋼梁の塑性変形性状に関する研究（その２ 梁の基本的性状に関する実験的研究)

    日本建築学会大会学術講演梗概集  1997 

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  • フープ筋を粗密に配筋した RC 柱の偏心圧縮実験（略水平割れ誘導による RC 柱靭性改善の試み その３)

    日本建築学会大会学術講演梗概集  1997 

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  • 外周ブロックを用いた鉄筋コンクリート柱の偏心圧縮実験（略水平割れ誘導による RC 柱靭性改善の試み その２)

    日本建築学会大会学術講演梗概集  1997 

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  • EVALUATION OF THE PLASTIC DEFORMATION CAPACITY MODIFIED BY THE EFFECT OF DUCTILE FRACTURE

    1997 

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  • EVALUATION OF THE PLASTIC DEFORMATION CAPACITY MODIFIED BY THE EFFECT OF DUCTILE FRACTURE

    1997 

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  • 角形断面柱に接合される高張力鋼梁の塑性変形性能に関する研究（その２. 構成板要素板厚が塑性変形能力に与える影響）

    日本建築学会大会学術講演梗概集  1998 

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  • 角形断面柱に接合される高張力鋼梁の塑性変形性能に関する研究（その１. 実験及び崩壊形式）

    日本建築学会大会学術講演梗概集  1998 

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  • 骨組の水平剛性が骨組内柱材の座屈長さに与える影響

    日本建築学会大会学術講演梗概集  1995 

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  • 降伏比の異なる 590 N/mm2級高張力鋼梁の崩壊形式と塑性変形能力評価（その 2 延性破壊による崩壊)

    日本建築学会大会学術講演梗概集  1996 

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  • 降伏比の異なる 590 N/mm2級高張力鋼梁の崩壊形式と塑性変形能力評価（その 1 座屈による崩壊)

    日本建築学会大会学術講演梗概集  1996 

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  • 降伏比の異なる 590 N/mm2級高張力鋼部材の繰返し履歴挙動とエネルギー吸収能力（その 2 梁)

    日本建築学会大会学術講演梗概集  1996 

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  • 降伏比の異なる 590 N/mm2級高張力鋼部材の繰返し履歴挙動とエネルギー吸収能力（その 1 材料特性)

    日本建築学会大会学術講演梗概集  1996 

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  • 純圧縮を受けるコンクリート充填円形鋼管短柱の座屈および座屈後挙動

    日本建築学会大会学術講演梗概集  1996 

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  • 十字形鉄骨を用いたかぶりなし鉄骨コンクリート柱部材の変形能力に関する研究 圧縮曲げせん断を受ける場合

    日本建築学会大会学術講演梗概集  1996 

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  • A STUDY ON PLASTIC DEFORMATION CAPACITY OF H-SHAPED HYBRID BEAM-COLUMNS

    1996 

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  • A STUDY ON PLASTIC DEFORMATION CAPACITY OF H-SHAPED HYBRID BEAM-COLUMNS

    1996 

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  • スカラップを有する高張力鋼梁の塑性変形能力に関する研究（その1. 実験概要及び崩壊形式)

    日本建築学会大会学術講演梗概集  1997 

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  • Post-buckling behavior of thin web plate under cyclic shear loading

    STESSA 2006 Behaviour of Steel Structures in Seisemic Areas  2006 

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  • 薄板鉄鋼材料を用いた鋼構造建築物の可能性の探求と開発 第３期２１世紀鋼構造フォーラムの中間報告

    鋼構造シンポジウム2006  2006 

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  • 正方形薄板のせん断座屈後繰返し挙動に関する研究 その1 載荷履歴の影響

    日本建築学会大会学術講演会  2006 

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  • 正方形薄板のせん断座屈後繰返し挙動に関する研究 その2 境界条件の影響

    日本建築学会大会学術講演会  2006 

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  • ウェブ薄板のせん断座屈後繰返し挙動に関する研究 その4 ウェブ薄板の大変形履歴後挙動

    日本建築学会大会学術講演会  2006 

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  • 繰返しせん断力を受ける金属系薄板の履歴挙動の安定性

    日本建築学会大会学術講演会  2006 

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  • H形鋼部材構成板要素の弾塑性座屈耐力算定法

    日本建築学会大会学術講演会  2006 

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  • ウェブ薄板のせん断座屈後繰返し挙動に関する研究 その3 繰返し履歴曲線のモデル化

    日本建築学会大会学術講演会  2006 

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  • Effect of Position of Neutral Axis to Elastic Buckling Strength of Plates under Bending Shear

    Journal of Constructional Steel  2006 

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  • Post-buckling behavior of thin web plate under cyclic shear loading

    STESSA 2006 Behaviour of Steel Structures in Seisemic Areas  2006 

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  • A Method for Evaluation of Elastic Buckling Strength of H Shaped Steel Member under Bending-Shear

    Journal of Constructional Steel  2006 

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  • ウェブ薄板のせん断座屈後繰り返し挙動に関する研究 その2 繰り返し後耐力に関する考察

    日本建築学会大会学術講演会  2005 

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  • 千鳥配置高力ボルト摩擦接合部のすべり耐力低下要因とすべり耐力予測に関する研究 千鳥配置高力ボルト摩擦接合部のすべり挙動に関する研究 その2

    日本建築学会大会学術講演会  2005 

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  • せん断力を受ける金属系薄板の張力場形成後繰返し挙動に関する一考察

    日本建築学会大会学術講演会  2005 

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  • ウェブ薄板のせん断座屈後繰返し挙動に関する研究 その1 正方形ウェブ薄板のせん断座屈後挙動

    日本建築学会大会学術講演会  2005 

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  • 角形鋼管柱梁接合部パネルの力学的挙動および耐力推定式に関する研究 その3 繰返し履歴曲線モデル

    日本建築学会大会学術講演会  2005 

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  • 不均等曲げを受けるH形鋼構成板要素の弾性座屈耐力に関する研究

    日本建築学会大会学術講演会  2005 

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  • 角形鋼管柱梁接合部パネルの力学的挙動および耐力推定式に関する研究 その1 有限要素法数値解析による力学的挙動の確認

    日本建築学会大会学術講演会  2005 

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  • 角形鋼管柱梁接合部パネルの力学的挙動および耐力推定式に関する研究 その2 載荷実験による力学的挙動の確認

    日本建築学会大会学術講演会  2005 

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  • 曲げせん断力を受けるH形鋼構成板要素の弾性座屈耐力算定法

    鋼構造年次論文報告集  2006 

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  • せん断曲げを受ける平板の弾性座屈耐力に中立軸位置が及ぼす影響

    鋼構造年次論文報告集  2006 

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  • H形鋼柱梁接合部パネルの力学的挙動および耐力推定式に関する研究 その2 耐力推定式

    日本建築学会大会学術講演会  2003 

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  • A Method for Evaluation Buckling Strength of Plate under Bending-Shear and Axial Force

    Coupled Instabilities in Metal Structures, CIMS2004  2004 

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  • H形鋼柱梁接合部パネルの力学的挙動および耐力推定式に関する研究 その1 パネル周辺要素の影響

    日本建築学会大会学術講演会  2003 

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  • 角形鋼管柱梁接合部パネルの力学性状に関する研究

    日本建築学会大会学術講演会  2004 

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  • 千鳥配置高力ボルト摩擦接合部のすべり挙動に関する研究

    日本建築学会大会学術講演会  2004 

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  • 正方形ウェブ薄板のせん断座屈後挙動に関する研究 その2 繰返し載荷時の座屈後挙動

    日本建築学会大会学術講演会  2004 

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  • せん断曲げを受けるウェブの弾性座屈耐力に及ぼすフランジねじり剛性の影響

    日本建築学会大会学術講演会  2004 

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  • 材料非線形領域における正方形薄板のせん断座屈挙動及び座屈後耐力

    日本建築学会大会学術講演会  2004 

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  • 正方形ウェブ薄板のせん断座屈後挙動に関する研究 その1 一方向載荷時の大変形挙動

    日本建築学会大会学術講演会  2004 

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  • A Method for Evaluation Buckling Strength of Plate under Bending-Shear and Axial Force

    Coupled Instabilities in Metal Structures, CIMS2004  2004 

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  • アルミニウム合金の機械的性質に関する基礎的研究 その2 せん断載荷

    日本建築学会大会学術講演会  2003 

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  • A STUDY ON SHARE FORCE TRANSMISSION MECHANISM OF H-SHAPED STEEL BEAMS WITH WEB-OPENING

    2002 

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  • せん断崩壊型H形鋼部材の塑性変形能力改善に関する研究 その4 ステンレス鋼を用いた場合

    日本建築学会大会学術講演会  2003 

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  • アルミニウム合金の機械的性質に関する基礎的研究 その1 単純引張載荷

    日本建築学会大会学術講演会  2003 

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  • せん断崩壊型H形鋼部材の塑性変形能力改善に関する研究 その2 繰返し載荷実験

    日本建築学会大会学術講演会  2003 

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  • せん断崩壊型H形鋼部材の塑性変形能力改善に関する研究 その3 補強効果

    日本建築学会大会学術講演会  2003 

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  • 逆対称曲げせん断力を受ける周辺固定支持平板の弾性座屈耐力評価

    日本建築学会大会学術講演会  2003 

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  • せん断崩壊型H形鋼部材の塑性変形能力改善に関する研究 その1 せん断パネルの座屈後変形

    日本建築学会大会学術講演会  2003 

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  • 高力ボルト摩擦接合部のすべり挙動とすべり耐力予測に関する研究 その1 高力ボルト摩擦接合部のすべり挙動の基本性状

    日本建築学会大会学術講演会  2003 

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  • 高力ボルト摩擦接合部のすべり挙動とすべり耐力予測に関する研究 その2 ボルト張力の低下性状のモデル化とすべり耐力の算定

    日本建築学会大会学術講演会  2003 

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  • 中立軸補強された境界梁の塑性変形能力 境界梁のせん断補強 その2

    日本建築学会大会学術講演会  2002 

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  • H形鋼梁の塑性変形性状に及ぼす端部境界条件及び応力状態の影響 その2 変形性状に影響を与える要因と塑性変形能力評価

    日本建築学会大会学術講演会  2002 

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  • 境界梁における中立軸補強効果の確認実験 境界梁のせん断補強 その1

    日本建築学会大会学術講演会  2002 

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  • 円形開口を有するH形鋼梁のせん断力伝達機構

    日本建築学会大会学術講演会  2002 

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  • H形鋼梁の塑性変形性状に及ぼす端部境界条件及び応力状態の影響 その1 端部フランジ補強梁の基本性状

    日本建築学会大会学術講演会  2002 

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  • H形鋼柱梁接合部パネルの繰返し載荷実験 その1 繰返し載荷実験

    日本建築学会大会学術講演会  2002 

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  • H形鋼柱梁接合部パネルの繰返し載荷実験 その2 実験式の導出

    日本建築学会大会学術講演会  2002 

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  • 高摩擦係数板を用いた高力ボルト摩擦接合部の力学性状に関する研究

    日本建築学会大会学術講演会  2002 

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  • 繰返し荷重を受ける高力ボルト摩擦接合部のすべり挙動と耐力評価 高力ボルト摩擦接合部のすべり挙動に関する研究 その2

    日本建築学会大会学術講演会  2002 

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  • A STUDY ON SHARE FORCE TRANSMISSION MECHANISM OF H-SHAPED STEEL BEAMS WITH WEB-OPENING

    2002 

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  • 偏心曲げを受ける鋼梁の横座屈性状 ―その3 換算細長比を用いた横座屈耐力評価

    日本建築学会大会学術講演会  2001 

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  • 偏心曲げを受ける鋼梁の横座屈性状 ―その2 二重ウェブ形鋼梁の横座屈性状

    日本建築学会大会学術講演会  2001 

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  • せん断曲げを受けるＨ形鋼梁の最大耐力決定要因と塑性変形能力に関する研究 ―その2 塑性変形能力評価

    日本建築学会大会学術講演会  2001 

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  • せん断曲げを受けるＨ形鋼梁の最大耐力決定要因と塑性変形能力に関する研究 ―その1 最大耐力決定要因

    日本建築学会大会学術講演会  2001 

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  • Ｈ形鋼柱梁接合部パネルの力学性状に関する研究 ―その1 基本性状

    日本建築学会大会学術講演会  2001 

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  • H形鋼梁ウェブ板要素のせん断座屈挙動に関する研究

    日本建築学会大会学術講演会  2001 

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  • 高力ボルト摩擦接合部のすべり挙動に関する研究

    日本建築学会大会学術講演会  2001 

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  • Ｈ形鋼柱梁接合部パネルの力学性状に関する研究 ―その2 変形・崩壊性状

    日本建築学会大会学術講演会  2001 

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  • トラス型補強による境界梁の塑性変形能力 境界梁のせん断補強 その3

    日本建築学会大会学術講演会  2002 

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  • 中立軸補強によるウェブ幅厚比の大きなH形鋼梁の塑性変形性能

    日本建築学会大会学術講演会  2002 

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  • 繰返し荷重を受けるウェブ幅厚比の大きなH形断面梁の力学特性 その1 新たな幅厚比制限値及び区分の提案

    日本建築学会大会学術講演梗概集  2009 

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  • 矩形形状を有する波形鋼板の面内せん断剛性 その2 境界条件が及ぼす影響

    日本建築学会大会学術講演梗概集  2009 

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  • 面内圧縮力を受ける鋼板サンドイッチパネルの座屈挙動

    日本建築学会大会学術講演梗概集  2009 

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  • 面内せん断力を受ける波形鋼板パネルの端部崩壊挙動 その2 剛性および耐力の評価

    日本建築学会大会学術講演梗概集  2009 

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  • 矩形形状を有する波形鋼板の面内せん断剛性 その1 解析概要及び基本的性質

    日本建築学会大会学術講演梗概集  2009 

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  • Hysteretic Behavior of Thin Web Plate under Cyclic Bending-Shear Loading

    Sixth International Conference on Urban Earthquake Engineering  2009 

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  • 面内せん断力を受ける波形鋼板パネルの端部崩壊挙動 その1 パネルせん断試験

    日本建築学会大会学術講演梗概集  2009 

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  • Plastic Deformation Capacity and Post Buckling Behavior of H窶鉄haped Beam with Large Depth-Thickness Ratio under Cyclic Loading

    2010 

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  • Hysteretic Behavior of Thin Web Plate under Cyclic Bending-Shear Loading

    Sixth International Conference on Urban Earthquake Engineering  2009 

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  • CYCLIC BEHAVIOR AND COLLAPSE MODE OF HIGH STRENGTH STEEL H-SECTION BEAMS

    JOINT CONFERENCE PROCEEDINGS 7th International Conference on Urban Earthquake Engineering (7CUEE) & 5th International Conference on Earthquake Engineering (5ICEE)  2010 

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  • Elastic Buckling Strength of Rectangular Corrugate Plates under Shear Loading

    2008 

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  • Coupled Buckling Strength of H-Shaped Beams under Bending- Shear

    2008 

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  • Hysteretic Characteristic of Thin Web Plate under Cyclic Bending-Shear Loading

    Fifth International Conference on Thin-Walled Structures  2008 

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  • Evaluation of Elastic Local Buckling Strength of H-Shaped Beam under Bending-Shear

    Fifth International Conference on Thin-Walled Structures  2008 

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  • Experimental Study on Estimation of Ds Factor for Hybrid Structures Composed with Steel Frame and Steel House Panel

    AIJ Tokai Chapter Architectural Research Meeting  2008 

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  • Effect on the Position of Neutral Axis to Elastic Buckling Strength of Plates under Bending Shear

    Journal of Structural Engineering  2008 

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  • 高強度鋼を用いたH形断面梁の繰返し性状 その2 構成板要素薄板化の可能性

    日本建築学会大会学術講演梗概集  2009 

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  • せん断力を受ける平板 -部分管体の捩り耐力問題

    日本建築学会大会学術講演梗概集  2009 

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  • 繰返し荷重を受けるウェブ幅厚比の大きなH形断面梁の力学特性 その2 繰返し履歴挙動と劣化性状に関する考察

    日本建築学会大会学術講演梗概集  2009 

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  • 高強度鋼を用いたH形断面梁の繰返し性状 その1 高強度鋼使用の可能性

    日本建築学会大会学術講演梗概集  2009 

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  • 矩形形状を有する波形鋼板のせん断弾性座屈耐力

    日本建築学会学術講演梗概集  2008 

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  • 面内圧縮力を受ける鋼板サンドイッチパネルの座屈耐力

    日本建築学会学術講演梗概集  2008 

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  • 繰返し荷重を受けるせん断座屈後ウェブ薄板の大変形性能

    日本建築学会学術講演梗概集  2008 

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  • Coupled Buckling Strength of H-Shaped Beams under Bending- Shear

    2008 

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  • 連成局部座屈を考慮したH形断面梁部材構成板要素の幅厚比制限算定法

    日本建築学会学術講演梗概集  2008 

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  • Evaluation of Elastic Local Buckling Strength of H-Shaped Beam under Bending-Shear

    Fifth International Conference on Thin-Walled Structures  2008 

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  • Elastic Buckling Strength of Rectangular Corrugate Plates under Shear Loading

    2008 

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  • 中立軸位置を考慮した曲げせん断力を受ける平板の弾性座屈耐力算定

    構造工学シンポジウム  2008 

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  • Hysteretic Characteristic of Thin Web Plate under Cyclic Bending-Shear Loading

    Fifth International Conference on Thin-Walled Structures  2008 

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  • 骨組構造とスチールハウス耐力壁とのハイブリッド構造のDs値に関する実験

    日本建築学会東海支部研究報告書  2008 

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  • 曲げせん断力を受けるH形断面梁部材の連成座屈に関する研究

    鋼構造年次論文報告集  2007 

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▼display all

Industrial property rights

  • せん断パネル、形鋼、及び耐力壁

    五十嵐規矩夫

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    Applicant：国立大学法人東京工業大学

    Application no：特願2008-146881  Date applied：2008.6

    Announcement no：特開2009-293254  Date announced：2009.12

    J-GLOBAL

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  • 金属薄板を備えたエネルギー吸収部材及びその製造方法

    五十嵐 規矩夫

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    Applicant：国立大学法人東京工業大学

    Application no：特願2005-236654  Date applied：2005.8

    Announcement no：特開2007-051452  Date announced：2007.3

    Patent/Registration no：特許第4649611号  Date registered：2010.12 

    J-GLOBAL

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  • 金属薄板を備えたエネルギー吸収部材及びその製造方法

    五十嵐 規矩夫

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    Applicant：国立大学法人東京工業大学

    Application no：特願2005-236654  Date applied：2005.8

    Announcement no：特開2007-051452  Date announced：2007.3

    J-GLOBAL

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Works

  • 高強度鋼の局所的塑性化に関する共同研究

    2009 - 2010

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    Work type：Artistic work  

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  • 新構造建築物の耐震性能評価に関する研究

    2007 - 2008

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    Work type：Artistic work  

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  • 金属系極薄板を備えた繰返し履歴安定化エネルギー吸収部材の開発

    2005

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    Work type：Artistic work  

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Awards

  • 手島精一記念研究賞（藤野志郎賞）

    2010  

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    Country：Japan

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  • Tejima Research Award

    2010  

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  • 日本鋼構造協会論文賞

    2008  

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    Country：Japan

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  • 東工大工系創成的研究賞

    2008  

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    Country：Japan

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  • 日本建築学会奨励賞

    2005  

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    Country：Japan

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Research Projects

  • Exploration of steel structural joints utilising next-generation adhesives to avoid brittle fracture

    Grant number：25K21688  2025.6 - 2029.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Challenging Research (Pioneering)

    Kazuya Mitsui, Kikuo Ikarashi, Atsushi Sato, Lettieri Annarosa

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    Grant amount：\25740000 （ Direct Cost: \19800000 、 Indirect Cost：\5940000 ）

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  • 鋼構造部材の強振動繰返し履歴下での保有性能解明と終局性能統合型評価手法の確立

    Grant number：24H00347  2024.4 - 2029.3

    日本学術振興会  科学研究費助成事業  基盤研究(A)

    五十嵐 規矩夫, 三井 和也

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    Grant amount：\47970000 （ Direct Cost: \36900000 、 Indirect Cost：\11070000 ）

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  • 鋼構造部材の安定性評価手法の統一化およびその応用としての合理的設計手法の確立

    Grant number：20H02294  2020.4 - 2024.3

    日本学術振興会  科学研究費助成事業 基盤研究(B)  基盤研究(B)

    五十嵐 規矩夫, 三井 和也

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    Grant amount：\17550000 （ Direct Cost: \13500000 、 Indirect Cost：\4050000 ）

    本研究は，鋼構造に対する設計行為の明確化および合理化に繋げる鋼構造の設計体系の高度化を図るために，その設計手法が連続かつ統一的となることを目指し，鋼構造部材の使用条件範囲を区分，設定，限定しない統一的な安定性評価手法を構築することを目的としている．具体的には，(１)主要構造部の部材として使用されていない薄い板厚の範囲における部材挙動およびその構造性能の解明，(２)鋼構造部材の軽量化，大断面化に伴う断面形状および補剛等を考慮した周辺部材の簡略化，(３)現行規準，指針における仕様，使用範囲から逸脱している部材の詳細な部材性能評価であり，研究全体は５つのサブテーマから構成されている．
    以上の目的のため，２年目の令和３年度は，以下のサブテーマ「２)圧縮力および曲げを受ける組立部材の安定性評価」，「３)薄板H形断面部材の安定性評価の高度化と接合部への展開」を主に検討し，令和２年度の検討で，新規かつ詳細な検討が必要と判断したサブテーマ「１）圧縮力および引張力を受ける非対称断面部材の弾塑性性能評価」の一部についても継続検討した．
    サブテーマ２)では，様々な接合ピッチを有する薄板非対称断面組立引張材に対する新たな合理的設計式を提案した．圧縮および曲げを受ける組立材の挙動については，その基本的な特性に対する検討は終了しているが，サブテーマ１）の知見および接合要素のモデル化等の詳細な検討が必要と判断し，予定の研究期間を延長して行なうこととした．なお，サブテーマ１)では，薄板非対称断面部材の境界条件に応じた座屈モードの解明および終局耐力評価を行なった．サブテーマ３)では，柱梁接合部および近傍部位の薄板化の可能性とその安定条件を踏まえた設計法に向けた検討を行った．さらに，サブテーマ「４)冷間成形角形鋼管部材の連成座屈不安定挙動の解明」に向けた基礎資料の収集と基礎的検討を開始した．

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  • Stability evaluation of thin plate steel structure members considering actual conditions and application-oriented design method

    Grant number：17H03338  2017.4 - 2020.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    Ikarashi Kikuo

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    Grant amount：\16380000 （ Direct Cost: \12600000 、 Indirect Cost：\3780000 ）

    The purpose of this study is to evaluate the actual performance of thin plate steel structural members in the ultimate state and to establish a rational design method. In particular, the performance of steel structural members composed of thin plates depends on the buckling instability phenomenon. A new thin plate member design method was proposed to calculate the elastic buckling strength and the ultimate strength by grasping and clarifying its behavior.
    Furthermore, the relationship between the end shape, boundary conditions, and stiffening stiffener, which has a great influence on the instability of thin steel structural members, was shown. From the results, the rational design method considering the more rational development of thin steel structural members and the relation with surrounding members was shown.

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  • Evaluation of stability of lightweight steel sheet steel structure and its application to efficient shape and form development of earthquake resistant structure

    Grant number：26289189  2014.4 - 2017.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    Ikarashi Kikuo, SATOU ATSUSHI, ISHIHARA TADASHI, TOMIOKA YOSHITO

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    Grant amount：\16380000 （ Direct Cost: \12600000 、 Indirect Cost：\3780000 ）

    This study focuses primarily on corrugated steel plates, steel plate sandwich panels, and cold-formed channel section members to evaluate their stability and seismic performance.
    These evaluations confirmed the properties of the materials constituting the members, and specified the relationship of the material properties of the members with the structural properties. Performing theoretical analysis, numerical analysis, and loading test clarified the structural properties of the members according to boundary conditions, connection conditions, and loading conditions of the members. Moreover, a performance evaluation formula was derived that would contribute to rational design methods.
    A structural form by appropriately combining thin plate members was proposed and showed the future development and potential of the thin plate structure type through trial construction experiment.

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  • Investigation of steel structural members behavior under the sever earthquakes and the establishment of advanced buckling design

    Grant number：23360242  2011.4 - 2014.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    IKARASHI Kikuo, NISHIMURA Koshiro, WANG Tao

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    Grant amount：\19890000 （ Direct Cost: \15300000 、 Indirect Cost：\4590000 ）

    Coupled instability behavior and the plastic deformation capacity of H-shaped steel beams under the cyclic load are cleared in this study.
    Buckling strength of the beam is cleared by theoretical analysis. And the cyclic loading tests are carried out. From these results, plastic deformation capacities of H-shaped steel beams which are collapsed by coupled buckling are estimated.
    And effective buckling bracing methods and shape of members are examined. Effectiveness of floor slab was also examined, and those compression buckling design methods are proposed.

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  • Development of light resisting wall and energy absorption element using the post-buckling behavior of thin metal panel

    Grant number：18560543  2006 - 2008

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    IKARASHI Kikuo

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    Grant amount：\4060000 （ Direct Cost: \3400000 、 Indirect Cost：\660000 ）

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  • 薄板を用いた鋼構造物の可能性

    2003

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    Grant type：Competitive

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  • 鋼構造部材の塑性変形能力に及ぼす各種鋼素材が有する機械的性質の影響

    Grant number：09750649  1997 - 1998

    日本学術振興会  科学研究費助成事業 奨励研究(A)  奨励研究(A)

    五十嵐 規矩夫

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    Grant amount：\2100000 （ Direct Cost: \2100000 ）

    鉄骨部材の塑性変形を確保するための規定の一つに幅厚比規定がある。本研究はこの幅厚比規定の中に盛り込まれているF値の適切な定義の仕方に対して考察を加えたものである。特に高張力鋼に対して適切なF値(以後,規定応力度)の定義法を確立することを目的とした。また鉄骨部材の塑性変形能力を決定づける鋼材の機械的性質の中で重要な要因は,降伏応力度にかぎるものではないく,特にひずみ硬化勾配,ひずみ硬化開始ひずみ等は部材の塑性変形能力に大きく影響を及ぼす要因であることに着目して研究を進めてきた。
    昨年度は590N/mm^2級高張力鋼を対象として簡単な数値解析及び載荷実験を行った。これらを通して通常塑性変形能力が期待できるとされている程度の幅厚比のフランジ板要素における局部座屈発生ひずみに対して考察を加え,材料の引張試験結果から得られる応力ひずみ関係を用いて規定応力度の定義法を決定した。ここで規定応力度は,申請者があらたに定義した材料定数であり,これにより実態ととしてに部材の塑性変形能力を簡便に評価されうる因子である。
    本年度は,昨年得られた規定応力度定義法を現在建築の分野で使用されている鋼材に対しても適応可能かどうかについて検討を加えた。まず400N/mm^2級から780N/mm^2級の現行使用されている鋼材の引張実験により,それらの材料特性の取りうる範囲を明らかにした。この材料特性の取りうる範囲を踏まえた上でで,載荷実験と数値解析により,現行使用されている鋼材の全種類にわたり本研究で提案する規定応力度を用いることで統一的に部材の塑性変形能力が評価できることを示した。さらに部材の塑性変形能力に影響を及ぼすであろう材料特性のうち,降伏応力度,降伏棚野長さ及びひずみ硬化勾配に注目し,パラメトリックな数値解析を通して,これらの影響を把握し塑性変形能力との関係を明らかにした。

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  • 局部座屈及び延性破壊の相互効果で決定づけられる高張力鋼梁の塑性変形能力評価

    Grant number：08750681  1996

    日本学術振興会  科学研究費助成事業 奨励研究(A)  奨励研究(A)

    五十嵐 規矩夫

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    Grant amount：\1100000 （ Direct Cost: \1100000 ）

    本研究は,梁の最大耐力決定要因として圧縮フランジの局部座屈と,引張フランジの延性破壊の両方を対象とし,梁の塑性変形能力がこれらの要因の相互効果により決定されるものとして捉えた。ここでは降伏比の高い高張力鋼を用いた梁を対象として,各板要素の幅厚比、材長を変数とし,実験を通してこれらの要因が梁の崩壊性状に与える基本的な影響を確認した。
    具体的には,梁の塑性変形能力を高める上で構成板要素の幅厚比を小さくすることは必要であるが,特定の幅厚比以下のものを使用する場合には,梁の最終崩壊形式が引張フランジの延性破壊となることがあり,小さい幅厚比の梁ほど塑性変形能力は小さくなることを明らかにした。また,ウエブ幅厚比の小さい梁は,フランジの局部座屈を抑制する効果によりフランジの局部座屈が成長せず,最大耐力が引張フランジの延性破壊で決まる可能性があり,延性破壊に関してもウエブ,フランジの相互作用を考慮する必要があることを示した。さらにウエブ,フランジの幅厚比が共に等しい同断面の梁においても材長が短くなると最大耐力が延性破壊が決定される可能性があり,梁の崩壊形式及び塑性変形能力評価にはモーメント勾配も考慮する必要があることを示した。
    同時に数値解析を通して,局部座屈と延性破壊の相互効果で決定される高張力鋼梁の塑性変形能力をフランジ幅厚比で整理し、最大耐力の決定要因が局部座屈から延性破壊に遷移するフランジ幅厚比の境界は,ウエブ幅厚比,材長により変化し,ウエブ幅厚比が小さいほどフランジ幅厚比の境界値は大きくなり,モーメント勾配がきついほど同様に大きくなることを明らかにした。また,梁の塑性変形能力を局部座屈と延性破壊の両面から評価し構成板要素の幅厚比で整理することができることを示した。

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  • 高軸力を受ける異種鋼材を用いたH形鋼柱部材の塑性変形能力評価

    Grant number：07750654  1995

    日本学術振興会  科学研究費助成事業 奨励研究(A)  奨励研究(A)

    五十嵐 規矩夫

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    Grant amount：\1000000 （ Direct Cost: \1000000 ）

    本研究は,フランジには軟鋼を使用したまま,ウエブに高張力鋼を使用したハイブリッド柱部材を提案し,その塑性変形性能について検討したものである。柱部材としてH形断面を用いた場合,断面中心に位置するウエブが軸力負担能力を十分に有しているならば,高軸力下においてもフランジのみならず,ウエブも曲げ応力を負担することができ,柱部材の有する曲げ耐力と塑性変形能力は耐震設計上十分な数値を確保する事が可能となる。本研究では,高張力鋼が高い降伏点を有するという特長を利用し,ウエブのみに高張力鋼を使用することで高軸力を保持し,十分な塑性変形能力を有し得る柱部材を提案した。
    ウエブに80キロ級の高張力鋼を使用したハイブリッド柱部材の載荷実験を通して,特に高軸力Fにおける力学性状について検討を加えた。試験体は,比較のために行った軟鋼柱部材も含めて9体であり,軸力比,ウエブ板厚をパラメータとした。その結果,ハイブリッド柱部材では高軸力下においても塑性中立軸がウエブ断面内に存在していることで,ウエブ断面内の圧縮応力分担領域が減少し,その結果として部材の最大耐力,塑性変形能力が向上することを明らかにした。さらにウエブの板厚をフランジ板厚よりも厚くした場合には,同時に連成局部座屈を抑えることができ,さらに部材の塑性変形能力が向上することを示した。
    また柱部材の最大耐力,塑性変形能力についての実験式を示した。この実験式は軸力と幅厚比の二乗の積(γ)で整理され,最大耐力は指数曲線的,塑性変形能力は直線的に表される。γの増加にともないハイブリッド柱部材と軟鋼柱部材との開きが大きくなり,ハイブリッド柱部材の有効性が顕著になることを明らかにした。さらに,このハイブリッド柱部材の塑性変形能力を,短柱圧縮試験より得られる構成板要素の局部座屈耐力を用いた塑性変形能力評価法を使用して,軸力比及び幅厚比の関係で整理した。

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