墙脚可更换PEC剪力墙滞回性能研究

Seismic Behavior of Earthquake-resilient Partially Encased Composite Shear Wall

目前对于部分外包组合剪力墙(PEC剪力墙)基于震后可恢复性能设计方法的研究却很少,一定程度上限制该结构的发展与应用。为使PEC剪力墙的震后恢复,防屈曲支撑阻尼器被选作可更换构件,代替PEC剪力墙震后易于破坏的墙脚,通过有限元分析软件ABAQUS,模拟了恒定轴压下的普通PEC剪力墙的水平低周循环加载试验,对此剪力墙进行了有限元分析研究,同时与原结构滞回性能进行对比。结果表明:带可更换墙角构件的PEC墙结构具有良好的抗震能力、滞回曲线饱满且稳定、耗能能力优于普通PEC剪力墙、是一种双重防线的抗震结构体系。

Currently,there are few studies on the design methods of PEC shear wall with post-earthquake resilient performance,which limits the development and application of this structure.In order to achieve the earthquake-resilient behavior of PEC shear wall,the buckling-restrained damper was selected as a replaceable component to replace the vulnerable foot of the PEC shear wall.Finite element analysis software ABAQUS is adopted to simulate the horizontal low-cycle cyclic loading test of the ordinary PEC shear wall under constant axial pressure.And numerical study of the PEC shear wall with replaceable corner members was conducted and corresponding structural behaviors were compared with the original structure.The results show that the PEC wall structure with replaceable corner members has good seismic resistance,and the hysteresis curve is full and stable,which is a kind of anti-seismic structural system with double seismic fortification.