钢管混凝土分叉柱节点受力性能试验研究  

Experimental study on mechanical behavior of concrete filled steel tubular intersecting connections

作　　者：王伟[1] 严鹏[2] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]同济大学建筑工程系,上海200092

出　　处：《建筑结构学报》2013年第S1期123-127,共5页Journal of Building Structures

基　　金：国家自然科学基金重点项目(51038008)

摘　　要：以东方之门大厦为工程背景,选取截面形式为矩形钢管混凝土分叉柱节点和圆形钢管混凝土分叉柱节点各1个作为研究对象,对试验节点进行大比例模型单调加载试验,研究节点的屈服荷载、极限荷载和延性性能。试验过程中两节点试件的破坏模式分别表现为空心钢管柱部分受压屈曲破坏和钢管混凝土柱部分偏心受压破坏。试验结果表明:试件N-KZ1B和试件N-KZ2的极限荷载分别达到最不利设计荷载的3.89倍和4.18倍,2个节点试件均具有较高的屈服荷载和极限荷载,满足结构设计要求;当达到极限荷载时,钢管混凝土柱和空心钢管柱进入塑性状态,而节点域仍保持弹性,表明结构设计达到了强节点弱构件的抗震要求;同时节点试件变形能力较好,具有良好的延性性能。Based on the practical engineering project of the Oriental Gate,the large scale tests on concrete filled steel tubular intersecting connections were conducted.Two specimens with rectangular section and circular section were tested under monotonic loading.The failure modes of the two specimens were characterized by buckling of the hollow steel tube columns and eccentric compression damage of concrete filled steel tubular columns.Test results show that the ultimate strength of specimens N-KZ1B and N-KZ2 can reach 3.89 times and 4.18 times of the design load.Both specimens have enough yield and ultimate capacity to satisfy the design requirements.When the specimens reach the ultimate state,the components develop inelastic deformation while the core area of connection stays elastic,showing a favorable seismic performance.Test results indicate that specimens show relatively satisfying load carrying capacity as well as considerable ductility.

关 键 词：钢管混凝土分叉柱 节点 静力试验 受力性能 延性 

分 类 号：TU398.9[建筑科学—结构工程]