不同连接构造形式密肋复合墙体抗震性能试验研究

Experimental Research on Seismic Performances of the Multi-grid Composite Wall with Different Connection and Construction Forms

密肋复合墙结构采用预制装配式或现砌现浇方法建造时,其内部密肋复合墙与外部隐形框架之间可以采用三种连接构造形式。为研究不同连接构造形式对密肋复合墙体抗震性能的影响,对3片不同连接方式的1/2比例墙体试件进行低周反复荷载试验,总结了密肋复合墙体试件的破坏过程和破坏特点,分析3片墙体在承载力、滞回曲线、刚度、延性等方面的差异,并对其主要影响原因进行讨论。试验研究表明:当钢筋、混凝土及砌块用量基本相同时,三种不同连接构造形式墙体在破坏形态和延性方面差别不大,但其各自抗震性能并不相同,采用现砌现浇式制作的密肋复合墙抗剪承载力和刚度明显优于预制装配式。

The multi-grid composite wall structure can be constructed with prefabrication assembly construction method or cast-in-place method,and three connection and construction forms can be used in the structure between the inner composite wall and the outer frame.In order to find out how different connection and construction forms influence the seismic performances of multi-grid composite wall,cyclic reversed loading tests were conducted on 3 composite wall specimens of half scale.The failure process and features of specimens are introduced,and the seismic performance such as bearing capacity,hysteretic curve,stiffness,ductility were investigated,and the main reasons are discussed.Test results show that with the same amount of concrete,steel bar and blocks,the seismic performances of the walls with different connection and construction forms are different,and the bearing capacity and stiffness of the wall made by cast-in-place method are better than that of the wall made by prefabricated method,and the differences in failure characters and ductility ability among three type walls are minimal.