钢结构箱形柱与梁异形节点力学性能分析  

Analysis on mechanical performances of steel box column-beam irregular joint

作　　者：薛建阳[1] 胡宗波[2] 刘祖强[1] 彭修宁[1] 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]武警工程学院建筑工程系,西安710086

出　　处：《建筑结构》2011年第6期42-47,共6页Building Structure

基　　金：国家自然科学基金(50978217);中国博士后科学基金(20080440814)

摘　　要：通过控制轴压比和梁高比,对6个钢结构箱形柱与梁异形节点模型进行拟静力试验,研究了钢结构异形节点的滞回曲线及其破坏特征,分析了钢结构异形节点的延性、极限承载力、强度与刚度退化、耗能能力等力学性能。结果表明:钢结构箱形柱与梁异形节点的抗震性能较好;位移延性系数在2.02～2.66之间,能够满足弹塑性极限变形的要求;节点域的耗能能力很强,小核心区耗能是节点耗能的主要方面;所有试件在层间位移角超过极限位移角时,强度与刚度无显著退化。Through quasi-static test of six different steel box column-beam irregular joint models,the behaviors of the hysteretic curve,failure mechanism were analyzed by taking the axial load level and beam height ratio into account.Some mechanical performances of steel irregular joint such as ductility,ultimate bearing capacity,degradation of strength and stiffness,energy dissipation were studied.The results indicate that the steel box column-beam irregular joint has good seismic performance and energy dissipation capacity.The ductility coefficient is between 2.02 and 2.66,which satisfies the requirements of plastic ultimate deformation.Steel irregular joint has stronger energy dissipation capacity.Energy dissipation in the small core area of panel zone plays key roles in energy dissipation of the specimen.Strength and stiffness degradation of all specimens are not notable when the interstory displacement exceeds ultimate displacement.

关 键 词：钢结构 异形节点 小核心区 强度与刚度退化 延性 耗能 

分 类 号：TU311.1[建筑科学—结构工程] TU317.1