装配式夹心剪力墙结构抗震性能研究  

Seismic behavior of precast sandwich shear wall structure

作　　者：徐刚[1] 张瑞君 李爱群[1,2] XU Gang;ZHANG Ruijun;LI Aiqun(School of Civil Engineering,Southeast University,Nanjing 211189,China;Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]东南大学土木工程学院,江苏南京211189 [2]北京建筑大学北京未来城市设计高精尖创新中心,北京100044

出　　处：《建筑结构学报》2020年第9期56-67,共12页Journal of Building Structures

基　　金：国家重点研发计划(2017YFC0703600);国家自然科学基金项目(51438002,51708257)。

摘　　要：夹心剪力墙包含夹心段和暗柱,在装配式夹心剪力墙结构中只考虑暗柱区域的竖向连接。为了研究采用不同连接形式的装配式夹心剪力墙结构的抗震性能,设计了3种连接形式,即湿式连接、干式刚性连接和摩擦耗能连接,并对3种连接形式的装配式夹心剪力墙结构进行了拟静力试验。结果表明:采用湿式连接和干式刚性连接的结构抗震性能基本一致,两者都主要依靠底层的塑性变形耗散能量;夹心构造改变了传统低矮剪力墙容易发生剪切破坏的模式,该类剪力墙主要发生弯曲变形及破坏;在采用摩擦耗能连接的结构中,混凝土结构主体在加载结束时仍保持弹性工作状态,刚度和承载力均较采用刚性连接结构的低,累积耗能未降低,摩擦耗能连接件达到了耗散地震能量和保护混凝土结构主体免遭塑性破坏的目的,底层水平缝处的连接件依靠水平缝的开合位移耗散能量,竖缝处的连接件依靠竖缝两侧墙体的相互错动位移耗散能量;采用摩擦耗能连接的结构需要额外的预应力增大其自复位能力。另外,建立了数值分析模型,采用分层壳和桁架单元分别模拟夹心剪力墙和接缝处的连接件,模拟分析的滞回曲线和主应变分布与试验结果吻合较好,该数值分析模型可用于模拟装配式夹心剪力墙结构在地震作用下的响应。There are sandwich regions and embedded columns in the sandwich shear wall,while only the vertical connections of the embedded columns are considered in the precast sandwich shear wall structure.To study the seismic behavior of precast sandwich shear wall structures with different connection types,three types of connections,including wet connection,dry rigid connection,and frictional energy dissipation connection,were designed for precast sandwich shear wall structures,which were subjected to pseudo-static tests.The experimental results indicate that the seismic performance of the structure with wet connections and that with dry rigid connections are basically the same,and both structures rely on the plastic deformation and damage of the bottom floor to dissipate energy.The failure mode of sandwich shear walls is significantly different from the shear failure mode of regular squat shear walls,and bending deformation and failure occurre in the sandwich shear walls.In the structure with frictional connectors,the main concrete structures remain elastic when the tests were completed,and the stiffness and lateral load capacity are lower than those of the structure with rigid connections.However,there is no decrease in the energy dissipation capacity,which shows that the frictional connectors can effectively dissipate energy and protect the main structure from damage.The frictional connectors in bottom horizontal joints dissipate energy by gap-opening and gap-closing,and the frictional connectors in vertical joints dissipate energy by relative vertical displacement of adjacent walls.Additional prestressing force is needed for the structure with frictional connectors to provide enough self-centering capability.In addition,numerical models were established to simulate the precast sandwich shear wall structures by using multi-layer shell elements and truss elements.The simulated results show that the hysteretic curves and principal strain distribution are in good agreement with the experimental results,which indicate that

关 键 词：装配式结构 夹心剪力墙 拟静力试验 抗震性能 摩擦耗能 

分 类 号：TU973.12[建筑科学—结构工程] TU317.1