Authorship：Lead author,　Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Architectural Institute of Japan  

DOI： 10.3130/aijt.31.1241

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Authorship：Lead author,　Corresponding author   Language：Japanese   Publisher：Architectural Institute of Japan  

This study conducted a static horizontal loading experiment on CLT rocking wall columns by introducing pre-stress. We understood the mechanical behavior in the case of changing the pre-stress amount and the PC bar’s cross-section.

We proposed a method for evaluating the relationship between the bending moment and the rotation angle of column base. The characteristics of the evaluation method are (i) Analyzed stress distribution cases at column bases and (ii) The uplifting of the column base was modelled using a spring model. The evaluation results could roughly reproduce the experimental values, although there were some improvements.

DOI： 10.3130/aijs.90.365

CiNii Research

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Authorship：Lead author,　Corresponding author   Language：Japanese   Publisher：JAPAN ASSOCIATION FOR EARTHQUAKE ENGINEERING  

Cross-laminated timber (CLT) mid-to-high-scale buildings are gaining widespread attention recently. However, developing damage control technology for CLT buildings to minimize damage and enable continued use after large earthquakes has not been established. This research aims to realize a wooden building with excellent performance maintenance after an earthquake experience by introducing a passively controlled CLT structure that uses a rocking wall column and a damper as part of the CLT earthquake-resistant frame. In previous research, the full-scale static shear test was conducted on a 1-story 1-bay passively controlled CLT structure by MATSUDA et al. (2023), and the passively controlled CLT structure, which has high performance of energy absorption and high origin return characteristics, were developed. To actively rock the wall columns, the column-beam joints of the passively controlled CLT structure are designed to have low rotational stiffness. In that test, while the behavior of the frame was analyzed, the behavior of the column-beam joint was not comprehensively identified. Therefore, we conducted the full-scale test on the column-beam joint of the passively controlled CLT structure to understand the mechanical behavior of the column-beam joint. Furthermore, the mechanical behavior of the CLT rocking frame proposed in this study was understood. We confirmed the differences in stiffness, maximum moment, force applied to the embedded surface, and size of the embedment and uplift when the joint shape assumed various shapes and positions. We also proposed a method to evaluate the relationship between the bending moment and rotation angle on the column-beam joints. Applying the idea of embedded triangular to the deformation of column-beam joints is a simple evaluation method that uses the compressive force of embedded triangular and the compatibility for the embedded triangular Equations. In this case, it was necessary to evaluate the uplift of the column-beam joints in advance, and we created a spring model to evaluate the uplift. Spring model was characterized by the stiffness of the tensional bolt, washer, and CLT connected in series. Although additional studies are required to reproduce the yield strength, it is believed that the test results can be accurately replicated.

DOI： 10.5610/jaee.25.4_176

CiNii Research

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Authorship：Lead author,　Corresponding author   Language：Japanese   Publisher：Architectural Institute of Japan  

The authors have previously proposed a calculation method to reproduce the mechanical behavior of the joints in CLT rocking frames as a damage control technology for mid- to high-rise wooden buildings. However, there are issues such as the model used for the evaluation may differ from the actual behavior, and the embedded stiffness at the contact area between the column and beam was calculated based on predictions from other literature. Therefore, the goal of this research is to understand the mechanical behavior of the column-beam joints of CLT rocking structures and repropose an evaluation method.

DOI： 10.3130/aijt.31.228

CiNii Research

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Authorship：Corresponding author   Language：Japanese   Publisher：Architectural Institute of Japan  

In this study, the static shear experiments were conducted to understand the mechanical behavior of the Shin-Kabe panel shear walls. Then, by applying the 4-Point Concentrated Method (reference 5), we proposed the mechanical model of the Shin-Kabe panel shear walls. The basic concept of the mechanical model is the same as the structural performance evaluation used in references 1) to 3), and we proposed the new concentrated method for the spring that expresses the nail effects. As a result, the new concentrated method was able to reproduce the experimental values well.

DOI： 10.3130/aijt.29.1308

CiNii Research

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Authorship：Corresponding author   Publishing type：Research paper, summary (national, other academic conference)  

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Authorship：Corresponding author   Publishing type：Research paper, summary (national, other academic conference)  

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Publishing type：Research paper, summary (national, other academic conference)  

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Publishing type：Research paper, summary (national, other academic conference)  

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Publishing type：Research paper, summary (national, other academic conference)  

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Language：English   Presentation type：Oral presentation (general)  

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Language：English   Presentation type：Poster presentation  

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Presentation type：Oral presentation (general)  

File： script7.pdf

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Presentation type：Oral presentation (general)  

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Presentation type：Oral presentation (general)  

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Other Link： https://www.aij.or.jp/paper/detail.html?productId=641661

Application no：特願2024-144277  Date applied：2024.8

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