钢管腹板削弱型梁柱弱轴连接的抗震性能影响因素分析  

Influence Factors Analysis on the Seismic Behavior of Weak-Axis Tubular Web Reduced Beam Section Connection

作　　者：卢林枫[1] 张廷强 吕品 LU Lin feng;ZHANG Tingqiang;LYU Pin(School of Civil Engineering, Chang'an University, Xi'an 710061, China)

机构地区：[1]长安大学建筑工程学院

出　　处：《建筑钢结构进展》2019年第3期77-86,共10页Progress in Steel Building Structures

基　　金：国家自然科学基金(51278061)

摘　　要：在节点域箱形加强式工字形梁柱弱轴连接和钢管腹板削弱型(tubular web reduced beam section,TW-RBS)连接的基本形式上,提出了一种工字形柱与H形梁的钢管腹板削弱型弱轴(weak axis tubular web reduced beam section,WA-TW-RBS)连接。设计了3个系列共14个WA-TW-RBS弱轴连接节点的对比分析模型,采用有限元软件Abaqus对钢管的直径、厚度以及钢管中心距蒙皮板外边缘的距离进行了变参数分析,研究这些参数的变化对节点滞回性能、刚度退化、节点延性和塑性转动能力的影响。研究结果表明:在上述参数合理的取值范围内,WA-TW-RBS连接节点的延性系数能达到3.0以上,节点的塑性转动能力不小于0.03rad,并且能有效地实现塑性铰外移,是一种非常理想的钢框架抗震节点形式。所有模型在分析时,钢柱和节点域都处于弹性阶段,满足"强柱弱梁"和"强节点弱构件"的抗震设计理念。Base on the basic forms of box-strengthened joint region connection for the weak-axis of I-section column and tubular web reduced beam section(TW-RBS),a new weak axis tubular web reduced beam section(WA-TW-RBS)connection with the boxstrengthen joint region is proposed for the I-section column and H-shaped beam in the seismic frame.In order to investigate the mechanical and seismic behavior of WA-TW-RBS connection,three series of 14 WA-TW-RBS connection specimens are analyzed using FEM software Abaqus.The diameter and thickness of steel tube and the distance from steel tube center to the surface of end plate are changed in the FE analysis.The influences of these parameters on the hysteretic behavior,stiffness degradation,ductility,and plastic rotational capacity are studied.The FEM analysis results show that all the ductility coefficients of the WA-TW-RBS connections are greater than 3.0,and all the plastic rotation angles of the specimens are not less than 0.03 rad,and all the connections are beneficial to form the beam plastic hinge and offset them from the panel zone.In the analysis,the steel column and the panel zone of all the specimens are still in the elastic stage,which indicates the seismic design concepts of"strong column and weak beam" and "strong joint and weak member" are satisfied.

关 键 词：钢管腹板 削弱型梁柱弱轴连接 刚度退化 延性系数 塑性转动能力 抗震性能 

分 类 号：TU391[建筑科学—结构工程]