竖向槽钢加劲带缝钢板剪力墙力学性能分析

Mechanical Properties Analysis of Vertical Channel Steel Stiffened Steel Plate Shear Wall With Slits

针对带缝钢板剪力墙开设竖缝后墙板平面外凸和刚度下降的问题,提出了一种设置槽钢加劲的带缝钢板剪力墙。采用ABAQUS软件模拟单侧设置两道竖向槽钢加劲带缝钢板剪力墙。通过改变槽钢加劲肋高、肋宽和肋厚,设置若干对照组。从滞回曲线、骨架曲线和刚度退化曲线3个方面对其力学性能进行了分析。研究结果表明:槽钢加劲肋高的增加对3个方面参数影响不大。随着槽钢加劲肋宽和肋厚的增加,试件滞回曲线越来越饱满,峰值荷载最大增幅为4.60%,刚度变化最大为71.13%。槽钢加劲肋宽、肋厚的增加有效约束了墙板平面外屈曲,同时结构的耗能能力、承载力和整体稳定性也得到了提升。

In order to solve the problem of convex plane and decreasing stiffness of wall plate after opening vertical joint of shear wall with welded steel plate,a shear wall with welded steel plate stiffening was proposed.The setting of two vertical channel steel stiffened steel plate shear wall with slits on one side was simulated by ABAQUS software.The number of control group was set by changing the channel steel rib high,rib width and thickness of stiffener.The mechanical properties were analyzed based on the hysteresis curve,skeleton curve and rigidity degradation curve.The results show that the increase of channel steel stiffening rib heights nearly has no impact on the structure parameters of the above three aspects.With the width and thickness of channel steel stiffener increasing,the hysteretic curve of the specimen becomes more and more full,with the maximum increase of peak bearing capacity of 4.60%and the maximum change of stiffness of 71.13%.The increase of channel steel stiffener width and thickness effectively restrains the out-of-plane buckling of wall panels,meanwhile the energy dissipation capacity,bearing capacity and overall stability of the structure are also improved.