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Seismic behaviour of an earthquake-resilient prefabricated beam-column cross joint

可恢复功能装配式梁柱中柱节点抗震性能研究

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Abstract

Earthquake-resilient structures have become a hot topic in seismic research. Based on the concept of damage control, this paper presents a new type of earthquake-resilient prefabricated beam-column cross joint (ERPCJ). After a strong earthquake, the function of the joint can be quickly restored because damage is concentrated mainly on replaceable connecting parts. First, the construction and advantages of the ERPCJ are explained, and its seismic design requirements are established. Then, the theory behind the design of the ERPCJ is proposed and verified by numerical simulation using eight ERPCJ models. The hysteretic behaviour of the ERPCJ was investigated using the finite element (FE) method considering the effects of the weakening profile in the flange cover plate, the thickness and strength of the flange cover plate, the distance between the middle bolts, the gap between the beams, and the bolt hole shape. Finally, cyclic loading and repairing tests were conducted on a basic specimen, and the rationality of the design theory was verified. The seismic performance and the post-earthquake resilience performance of the joint were investigated. Numerical analysis and experiments showed that the proposed design theory could accurately predict the yield load of the ERPCJ. A reasonably well-designed ERPCJ should have good bearing capacity, collapse resistance capacity, seismic performance, and post-earthquake resilience performance. The thickness and strength of the flange cover plate, the distance between the middle bolts, and the gap between the beams have a large effect on the seismic behaviour of the joint, and so should be properly designed.

中文概要

目的

提出一种震后功能可快速恢复的装配式中柱节 点,并建立其设计理论;考察装配式中柱节点的 抗震性能及震后修复性能,并提出设计建议。

创新点

提出一种可快速恢复震后功能的装配式中柱节 点;2. 提出装配式中柱节点设计理论,并通过数 值手段对其合理性进行校核;3. 试验研究考察基 础试件的抗震性能及震后修复性能。

方法

1. 通过理论分析手段建立装配式中柱节点设计理 论;2. 利用数值模拟手段通过4 组8 个算例来验 证节点设计理论,并对节点抗震性能进行数值研 究;3. 对基础试件进行低周往复荷载试验研究及 修复试验研究,进一步验证设计理论的合理性, 并考察节点的抗震性能及震后修复性能。

结论

1.提出的设计理论可准确地预测装配式中柱节点 的屈服荷载;2. 设计合理的装配式中柱节点具有 良好的承载性能及滞回特性,可满足结构震后功 能修复要求;3. 翼缘连接盖板厚度和材性、中间 螺栓间距和梁段间隙参数对节点抗震性能影响 较大,需合理设置。

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Authors and Affiliations

  1. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing, 100124, China

    Ai-lin Zhang, Ying-xia Wu & Zi-qin Jiang

  2. China State Construction Engineering Corporation, Beijing, 100029, China

    Xu-qiao Zhang

  3. Beijing Engineering Research Center of High-rise and Large-span Prestressed Steel Structure, Beijing, 100124, China

    Ai-lin Zhang & Zi-qin Jiang

  4. School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China

    Chao Dou

Authors
  1. Ai-lin Zhang
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  2. Ying-xia Wu
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  3. Zi-qin Jiang
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  4. Xu-qiao Zhang
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  5. Chao Dou
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Correspondence to Zi-qin Jiang.

Additional information

Project supported by the National Key Basic Research and Development Program of China (No. 2016YFC0701504), the National Natural Science Foundation of China (No. 51608014), the Natural Science Foundation of Beijing, China (No. 8174060), and the China Postdoctoral Science Foundation (No. 2017T100020)

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Zhang, Al., Wu, Yx., Jiang, Zq. et al. Seismic behaviour of an earthquake-resilient prefabricated beam-column cross joint. J. Zhejiang Univ. Sci. A 18, 927–941 (2017). https://doi.org/10.1631/jzus.A1700358

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  • DOI: https://doi.org/10.1631/jzus.A1700358

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