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Research on Seismic Performance of an Innovative Upper-Lower Half-Story Precast Shear Wall

机译:一种创新的上下半层楼层预制剪力墙抗震性能研究

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摘要

An innovative precast connection (the precast connection installed in the middle of the shear wall) was proposed for the shear wall. To verify the effectiveness of the proposed precast connection, two cast-in-situ shear walls (RCW1 and RCW2) and three precast shear walls (PCW1, PCW2, and PCW3) were manufactured and investigated. The construction joints were inserted in the bottom and the middle for RCW1 and RCW2; and the structural glue horizontal connection, structural glue cogged connection, and cast-in-situ plug grouting connection were utilized for PCW1, PCW2, and PCW3, respectively. The failure mode, loading capacity, ductility, stiffness degradation, and energy dissipation of specimens were analyzed under the horizontal low-frequency cycled loading. Simultaneously, a numerical simulation was carried out on the ABAQUS software, and simulation results were consistent with experimental results. The result showed that the moment-shear failure occurred in all the specimens except PCW1; the bottoms of PCW2 and PCW3 were still vulnerable regions. The bearing capacity and the ductility of RCW2 were improved to different degrees by installing the construction joint in the middle of the shear wall. Specifically, the structural glue cogged connection and the cast-in-situ plug grouting connection have no obvious effect on the reduction of bearing capacity but can improve the ductility of the specimen; the stiffness degradation and energy dissipation of RCW1, RCW2, PCW2, and PCW3 were basically the same.
机译:提出了一种创新的预制连接(安装在剪力墙中间的预制连接),用于剪切墙。为了验证所提出的预制连接的有效性,制造并研究了两个铸造原位剪力墙(RCW1和RCW2)和三个预制剪力墙(PCW1,PCW2和PCW3)。将施工接头插入底部和中间用于RCW1和RCW2;并且,用于PCW1,PCW2和PCW3,使用结构胶水卧式连接,结构胶凝固连接和铸造就地插头灌浆连接。在水平的低频循环载荷下分析了故障模式,装载能力,延展性,刚度降解和试样的能量耗散。同时,在ABAQUS软件上进行数值模拟,仿真结果与实验结果一致。结果表明,除PCW1之外的所有标本中发生的时刻剪切失败; PCW2和PCW3的底部仍然是弱势区域。通过在剪切墙的中间安装施工接头,轴承容量和RCW2的延展性得到改善到不同程度。具体地,结构胶凝固的连接和浇铸原位插头灌浆连接对轴承容量的降低没有明显影响,但可以改善样品的延展性; RCW1,RCW2,PCW2和PCW3的刚度降解和能量耗散基本相同。

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