竖向荷载对防屈曲组合钢板墙受剪性能的影响  

INFLUENCE OF VERTICAL LOAD ON SHEAR PERFORMANCE OF BUCKLING-RESTRAINED COMPOSITE STEEL PLATE SHEAR WALL

作　　者：陈麟[1] 赵锐荣[1] 周云[1] 

机构地区：[1]广州大学,广州510006

出　　处：《工业建筑》2011年第10期100-105,共6页Industrial Construction

基　　金：广东省基金团队项目(8351009101000001);广东省科技计划项目(2008B030303075);广州市科技计划项目(2008J1-C251-1);广州市属高校科技计划项目(08C048);广州大学减震控制与结构安全开放实验室基金项目

摘　　要：以ABAQUS为模拟平台,考虑内嵌钢板参与承重,建立两种防屈曲组合钢板墙模型BR-CSPWⅠ和BR-CSPWⅡ,后者的混凝土板与钢板共同承受竖向荷载。对防屈曲组合钢板墙的受剪性能、内嵌钢板的应力分布以及混凝土面外约束板的损伤与竖向荷载变化的相关性进行有限元分析,并对2个试件进行拟静力试验。结果表明:随竖向荷载增大,内嵌钢板与混凝土板间的相互作用加强,混凝土板损伤加剧。在混凝土板设计合理,面外约束刚度足够的情况下,内嵌钢板参与承重对防屈曲组合钢板墙的受剪承载力、受剪初始刚度以及耗能能力的削弱不显著,但竖向荷载会加重防屈曲组合钢板墙的边缘框架柱的受力负担,降低其抗弯能力。Two finite element models of buckling-restrained composite steel plate shear wall （BR-CSPW） named as BR-CSPW Ⅰ and BR-CSPW Ⅱ were constructed with the consideration of infill steel plate bearing vertical load. The difference between two models is the concrete plate and steel plate work together to bear vertical load in BR-CSPW Ⅱ. ABAQUS was used to conduct the analysis for the influence of vertical load on shear performance, stress distribution of infill steel plate and damage of concrete plate of BR-CSPW. Experimental studies on 2 shear wall specimens were carried out under cyclic lateral load. Analysis results show that with increasing of vertical load, the interaction between concrete plate and steel plate is enhanced and the damage of concrete plate is getting worse. The shear bearing capacity, initial stiffness and energy dissipation capacity of BR-CSPW will not decrease significantly under vertical load if the concrete plate is properly designed and detailed to provide sufficient out-of-plane restraining for steel plate. Under the action of vertical load, the bending capacity of boundary column is reduced for bearing more pressure.

关 键 词：防屈曲组合钢板墙 竖向荷载 受剪性能 耗能能力 损伤 

分 类 号：TU312.1[建筑科学—结构工程] TU392.4