采用拉缝板连接的现浇框架填充墙抗震性能试验研究

Study on seismic performance of cast-in-place frame infilled wall with slit plate connection

为研究拉缝板连接的现浇PVC管空心填充墙对结构抗震性能的影响。试验设计了6榀足尺单层单跨混凝土框架试件,其中:2榀空框架,2榀无拉缝板刚性连接的PVC管空心填充墙框架和2榀有拉缝板柔性连接的PVC管空心填充墙框架,通过对各试件进行低周反复荷载试验,研究了拉缝板连接的现浇填充墙框架的破坏特征、滞回曲线、骨架曲线、耗能比和刚度退化等抗震性能指标。同时对拉缝板进行抗压承载力试验和材料拉伸试验。结果表明:加入PVC空心填充墙能提升框架的初始刚度和承载力;有PVC结构拉缝板的试件组的抗震性能介于空框架与无PVC结构拉缝板的试件组之间,加入PVC结构拉缝板能一定程度提高框架的耗能能力,减缓整体框架刚度退化。

In order to study the influence of cast-in-place PVC pipe hollow infill wall connected by tensile plate on the seismic performance of the structure.Six full-scale single-story and single-span concrete frame specimens were designed,including two empty frames,two PVC tube hollow infilled wall frames without rigid connection of slit plate and two PVC tube hollow infilled wall frames with flexible connection of slit plate.Through the low cyclic loading test of each specimen,the seismic performance indexes such as failure characteristics,hysteresis curve,skeleton curve,energy dissipation ratio and stiffness degradation of cast-in-place frame infilled wall with slit plate connection were studied.At the same time,the bearing capacity test and material tensile test were carried out on the seam plate material.The results show that the addition of PVC hollow infilled wall can improve the initial stiffness and bearing capacity of the frame.The seismic performance of the specimen group with PVC structural seam plate is between that of the empty frame and the specimen group without PVC structural seam plate.Adding PVC structural seam plate can improve the energy dissipation capacity of the frame to a certain extent and slow down the stiffness degradation of the whole frame.