Seismic performance of repaired prefabricated shear walls
Seismic performance of repaired prefabricated shear walls
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预制剪力墙修复后的抗震性能
DOI：
10.1016/j.cscm.2023.e01896
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发表时间：
2023
影响因子：
6.2
通讯作者：
Ma Haibin
中科院分区：
文献类型：
--
作者：
Wang Tan;Ma Xianqian;Jiang Ruinian;Dou Lijun;Liu Jun;Hao Yinlong;Liao Liwei;Zhou Zhijie;Cao Yibo;Ma Haibin
对震损建筑物进行快速加固和修复，对震后恢复正常生活具有重要意义。因此，有必要对目前广泛使用的装配式房屋采用不同的加固方法后的抗震性能进行研究。本文设计了两种不同的方法来修复地震损坏的剪力墙灌浆套筒组装。根据不同的损伤情况，第一种方法采用高强水泥浆置换受损混凝土，第二种方法采用水泥浆套加固并植入钢筋和钢筋网加固受损截面。对修补后的墙体与原墙体的破坏形态、承载力、延性、耗能能力、刚度退化等进行了对比分析。试验结果表明，两种修补方法均能恢复装配式剪力墙的承载力。在此基础上，采用有限元分析方法，对两个不同轴压比的修复后的地震损伤剪力墙进行了抗震性能分析。在试验研究和有限元分析的基础上，采用Park-Ang双参数地震损伤模型，计算了装配式剪力墙和修补后剪力墙的地震损失指标。
It is important to quickly strengthen and repair earthquake-damaged buildings to restore the normal life after earthquake. Therefore, it is necessary to study the seismic performance of widely-used assembled buildings repaired with different approaches. In this paper, two different methods are designed to repair seismically damaged shear walls assembled with grouted sleeves. Based on different damage scenarios, the first method uses high-strength grout to replace damaged concrete, and the second method uses grout jacketing with reinforcement implantation and reinforcing mesh to enhance the damaged cross-section. The repaired walls are compared with the original walls on the damage mode, bearing capacity, ductility, energy dissipation capacity, and stiffness degradation. The test results verify that both repair methods can restore the load-bearing capacity of the assembled shear walls. Further, the seismic performance of the two repaired seismic-damaged shear walls with different axial pressure ratios is analyzed using finite element analysis. The seismic loss indices of the original assembled and the repaired shear walls are calculated using the Park-Ang two-parameter seismic damage model based on the results of the experimental studies and the finite element analysis.