腹板摩擦式自复位圆钢管混凝土柱-钢梁连接节点受力性能有限元模拟及参数分析  

Numerical and parametric study on the mechanical properties of self-centering circular concrete-filled steel tubular column to steel beam connection with web friction device

作　　者：朱丽华[1,2] 吉翠茹 李鸿雕 花成龙 ZHU Lihua;JI Cuiru;LI Hongdiao;HUA Chenglong(State Key Laboratory of Green Building in Western China,Xi'an University of Architecture&Technology,Xi'an 710055,China;School of Civil Engineering,Xi'an University of Architecture&Technology,Xi'an 710055,China)

机构地区：[1]西安建筑科技大学省部共建西部绿色建筑国家重点实验室,陕西西安710055 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《地震工程与工程振动》2019年第5期104-112,共9页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51878552);国家重点研发计划资助项目(2017YFC0703600);陕西省重点研发计划重点产业创新链(群)项目(2018ZDCXL-SF-03-03-01)~~

摘　　要：为了减小钢管混凝土柱-钢梁框架结构震后的残余变形,提出了一种腹板摩擦式自复位圆钢管混凝土柱–钢梁连接节点形式。介绍了自复位节点的基本构造,并对其受力性能进行了理论分析。采用ABAQUS建立了9个边节点模型,对节点在循环荷载作用下的基本力学性能及耗能特性进行了研究,分析了钢绞线初始预应力、预应力钢绞线距离及数量、螺栓预紧力、摩擦片与梁腹板之间的摩擦系数等参数对节点受力性能的影响。结果表明,腹板摩擦式自复位圆钢管混凝土柱–钢梁连接节点具有良好的耗能和自复位能力;节点的初始刚度、临界开口弯矩和自复位能力随着钢绞线初始预应力、钢绞线的数量的增大而提高;节点耗能能力随着螺栓预紧力、摩擦片与梁腹板之间的摩擦系数的增大而提高。In order to reduce the residual deformation of concrete-filled steel tubular column to steel beam frame structure after earthquake,a kind of self-centering circular concrete-filled steel tubular column to steel beam connection with web friction device was proposed.The detail of the self-centering connection was introduced,and its mechanical properties were analyzed theoretically.9 numerical models of exterior connection were built up by ABAQUS.The mechanical properties and energy dissipation capacity of the self-centering connection under reversed load were investigated.The effect of the strand prestress force,the distance and amount of the strands,the bolt prestress force of web friction device and the friction coefficient of the friction plate and the beam web on the mechanical properties of the connection were analyzed.The calculation results show that the connection has good self-centering and energy dissipation capacity.It was also found that the initial stiffness,the imminent gap-opening moment and the self-centering capacity of the connection increased with the increasing of the initial strand prestress force and the amount of the strands,and the energy dissipation capacity of the connection enhanced with the increasing of the bolt prestress force of web friction device and the friction coefficient of the friction plate and the beam web.

关 键 词：自复位 圆钢管混凝土柱–钢梁连接节点 摩擦耗能 有限元分析 受力性能 

分 类 号：TU398.2[建筑科学—结构工程] TU352.1