钢板墙与防屈曲组合钢板墙的受剪性能分析

摘要

Buckling-restrained composite steel plate shear wall (BR-CSPW) is a new type of earthquake-resisting element. With varying height-to-thickness ratio A of the steel plate, the shear performance of BR-CSPW and steel plate shear wall (SPW) under shear loading is studied by means of nonlinear finite element analysis using ABAQUS software. Large-deflection effect and out-of-plane initial imperfection are taken into account. To further identify the effect of internal force on the behavior of boundary column, interaction between steel plate and boundary column of BR-CSPW and SPW is also investigated. The results show that, according to different A, SPW can be categorized into three groups-thin SPW, medium thickness SPW and thick SPW; BR-CSPW resists the story shear by yielding in shears, and has relatively much higher shear capacity and energy dissipation capacity, which indicates that Using BR-CSPW instead of thin SPW and medium thickness SPW is feasible and won't cause the adverse effect of diagonal tension field action on the boundary column, as a result, is more advantageous to the desire for ductile design criterion of strong boundary frame-weak steel plate wall.%考虑几何非线性和面外初始缺陷,通过变化内嵌钢板的高厚比λ,考察了钢板墙与防屈曲组合钢板墙在水平荷载作用下的承载力、抗侧刚度和滞回性能的差异,并对比分析了两种墙体的内嵌钢板与边缘框架柱的相互作用.结果表明,随λ由大到小变化,钢板墙可分为薄钢板墙、中厚钢板墙和厚钢板墙三类；由于受到面外约束的作用,与钢板墙相比,防屈曲组合钢板墙具有更好的抗剪承载力和耗能能力,利用防屈曲组合钢板墙替代中厚钢板墙和薄钢板墙是经济可行的,且不存在因屈曲后拉力场效用对边柱产生的附加弯矩作用,更有利于实现“强框架弱墙体”的延性设计.