方钢管混凝土框架-十字加劲薄钢板剪力墙的力学性能研究  

Study on mechanical behavior of concrete-filled square steel tubular frame-cross-stiffened thin steel plate shear walls

作　　者：王先铁[1] 白连平[1] 王连坤[2] 马尤苏夫 刘天龙[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]五邑大学土木建筑学院,广东江门529020

出　　处：《地震工程与工程振动》2013年第2期103-109,共7页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51108369;51208385);教育部博士点新教师基金(20116120120008);陕西省教育厅专项科研基金项目(11JKY0942)

摘　　要：采用大型通用非线性有限元软件ABAQUS 6.10分别对方钢管混凝土框架-十字加劲薄钢板剪力墙和非加劲薄钢板剪力墙进行了数值分析,对二者的受力特征、刚度、极限承载力、剪力分配及柱子的受力特征进行了研究。结果表明:当肋板刚度比为30时,十字加劲肋能够提高钢板剪力墙结构的弹性屈曲荷载、极限承载力、初始刚度,降低柱子轴压比对剪力初始分配的影响;在加载的初始阶段(顶点侧移角小于0.2%),钢板剪力墙承担了大部分剪力,随后墙板承担剪力的比例逐渐下降,框架承担的比例逐渐上升,当顶点侧移角达到1%时,框架和钢板剪力墙承担剪力的比例保持不变;方钢管混凝土框架-薄钢板剪力墙的滞回环饱满,滞回性能稳定。由于薄钢板墙拉力场作用,方钢管混凝土柱壁易与混凝土发生分离,在设计时应予以注意。This paper presents a nonlinear numerical analysis of the concrete filled square steel tube （CFT） frame with cross-stiffened thin steel plate shear walls （CSPSW） and unstiffened thin steel plate shear walls （USPSW）. The stiffness, the ultimate load capacity, the shear distribution and the load carrying mechanism of columns are in- vestigated. Results obtained from this study are as follows ： （ 1 ） When the stiffness ratio of stiffeners to panels is 30, the cross stiffeners not only increase the elastic buckling load, ultimate load capacity and stiffness of the steel plate shear wall, but also decrease the influence of axial compression ratio on the initial distribution of shear force. （2） Most of shear are taken by the steel plate shear walls in the initial stage of loading （ up to the drift angle of 0.2% ）, and with the increase of the lateral load, the steel plate shear wails take less shear force and the frame does more, the distribution of shear force becomes unchanged after the drift angle reaches 1%. （3） The hysteretic curve of the structure is stable. （4） The separation between the tube wall and core concrete appears because of the action of the tensile field.

关 键 词：方钢管混凝土柱 薄钢板剪力墙 抗剪承载力 剪力分配 滞回性能 

分 类 号：TU398[建筑科学—结构工程] P315.92[天文地球—地震学]