方钢管混凝土柱节点的试验研究及非线性有限元分析  

EXPERIMENTAL INVESTIGATION AND NONLINEAR FINITE ELEMENT ANALYSIS ON THE BEHAVIOR OF CONCRETE-FILLED SQUARE STEEL TUBULAR COLUMN CONNECTIONS

作　　者：聂建国[1] 秦凯[1] 肖岩[2] 

机构地区：[1]清华大学土木工程系 [2]南加州大学土木工程系,洛杉矶90089

出　　处：《工程力学》2006年第11期99-109,115,共12页Engineering Mechanics

基　　金：国家自然科学基金资助项目(50438020)

摘　　要：基于方钢管混凝土柱内隔板式节点及外加强环式节点的低周反复荷载试验,在合理选择材料本构关系、破坏准则的基础上,采用通用有限元软件ANSYS对方钢管混凝土柱内隔板式节点和外加强环式节点进行了单调加载及循环加载作用下的受力性能分析。有限元分析得出的荷载-位移曲线及剪力-剪切变形曲线与试验结果吻合较好。在此基础上对外加强环式节点进行了参数分析,研究了方钢管混凝土柱的轴压比、宽厚比、核心混凝土强度及混凝土楼板高度对节点受力性能的影响,结果表明轴压比、宽厚比的影响较大。Based on the experiments of concrete-filled square steel tubular column connections with interior or exterior diaphragms under cyclic loading, 3-D nonlinear finite element models were used to analyze the mechanical properties of these two types of connections using ANSYS. Based on appropriate material stress-strain relations and failure criteria, finite element analyses were conducted under monotonic loading and cyclic loading. The load - deflection curves and shear force - deformation curves by finite element analyses show good agreement with those of the experiments. Parametric analyses were conducted on the connections with exterior diaphragms to investigate the influences of compression ratio, width to thickness ratio, strength of the concrete in the square steel tube and concrete slab height. It is found that compression ratio and width to thickness ratio are more important to the connections.

关 键 词：方钢管混凝土柱 内隔板式节点 外加强环式节点 有限元分析 参数分析 

分 类 号：TU317.1[建筑科学—结构工程]