Study on mechanical model of column footing in ancient timber structure based on rocking column

被引：0
|
作者：
Pan Y. [1 ,2 ]
An R. [1 ]
Chen J. [1 ]
Zhang Q. [1 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu
[2] Key Laboratory of Seismic Engineering of Sichuan Province, Southwest Jiaotong University, Chengdu
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2022年 / 43卷 / 06期
关键词：
Ancient timber structure; Column footing; M-θ mechanical model; Numerical model; Rocking process; Semi-rigid connection;
D O I：
10.14006/j.jzjgxb.2020.0737
中图分类号：
学科分类号：
摘要：
Timber columns are usually placed on the foundation directly in ancient timber structures, forming a column footing with compression capacity only and without tension capacity. Column footing is a semi-rigid joint when timber column rocks under the earthquake. To study the rocking mechanism of the column footing, firstly, the compression state of column footing was analyzed and the rocking process was classified. The judgment conditions of different rocking processes were proposed, and the moment-rotation (M-θ) mechanical model of column footing was established. Then, the mechanical model was validated by comparing it with the test results. Finally, the M-θ mechanical model was applied to the seismic analysis of ancient timber structures. The semi-rigid connection model and hinged model of the column foot were established and compared with the shaking table test results, respectively. The results show that the rocking process of timber columns can be divided into four types: elastic rocking of the full section, the elastic-plastic rocking of the small section, the elastic-plastic rocking of the large section, and the elastic-plastic rocking of the full section. The differences between the calculated results of the M-θ mechanical model and quasi-static test results are within 10%. Compared with the hinged column footing, the semi-rigid connection model results is closer to the dynamic response of the timber structure under earthquake. The differences between the results of the shaking table test and semi-rigid connection are within 20% for both peak acceleration and peak displacement. © 2022, Editorial Office of Journal of Building Structures. All right reserved.
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页码：196 / 206
页数：10
相关论文
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