钢框架梁柱顶底角钢弱轴连接节点的滞回性能分析  

HYSTERETIC BEHAVIOR ANALYSIS OF WEAK-AXIS JOINT OF STEEL FRAME BEAM COLUMN BOTTOM ANGLE

作　　者：卢林枫[1] 宋文龙[1] 刘子龙 Lu Linfeng Song Wenlong Liu Zilong(l. School of Civil Engineering, Chang＇ an University, Xi＇ an 710061, China Xi＇ an Branch, Shenzhen Machinery Building Design Co. Ltd, Xi＇ an 710075, China)

机构地区：[1]长安大学建筑工程学院,西安710061 [2]深圳机械院建筑设计有限公司西安分公司,西安710075

出　　处：《钢结构》2017年第5期55-60,共6页Steel Construction

基　　金：国家自然科学基金项目(51278061)

摘　　要：基于目前对钢框架梁柱弱轴半刚性连接节点的研究现状,对顶底角钢弱轴连接节点进行了研究。首先通过ABAQUS模拟分析,在与试验对比验证的基础上,将一种新型节点域箱形节点作顶底角钢弱轴连接,设计7个试件,通过计算得到了在低周反复荷载作用下的弯矩-转角曲线、骨架曲线、耗能系数和初始刚度等节点参数,重点研究了角钢厚度、受拉角钢连接螺栓与角钢趾距离以及角钢肢长等设计参数对该种连接方式的工作性能的影响。研究发现:随着角钢厚度的增加,连接节点的承载能力、初始刚度和滞回性能明显提高,但抗震性能、耗能性能有所下降,随着受拉角钢连接螺栓与角钢趾的距离的增加,连接节点的承载能力、初始刚度和滞回性能均有所下降,但耗能性能有所提高,随着角钢肢长的增大,连接节点的承载能力随之降低,初始刚度和滞回性能变化不大,耗能性能变化也不明显。Based on the research status of the weak-axis semi-rigid joint of the steel frame beam column,the top-seat angle weak-axis joint were studied. Firstly,through the simulation analysis,based on the verification and testing of ABAQUS,7 specimens with seat-angle weak-axis connection were designed,some joint parameters under quasi-static loading were calculated,such as the moment-rotation curve,skeleton curve,energy dissipation coefficient and the initial stiffness. The paper focused on the effect of design parameters on the pertformance of connection,such as angle thickness,the distance of tension angle connection bolts and steel angle toes,and leg length. The research showed that with the increase of steel angle thickness,the bearing capacity,the initial stiffness and hysteretic performance of the joint were improved significantly,but the seismic behavior and energy dissipation capacity declined; with the increase of the distance of tension connecting bolts and angle toes,the bearing capacity,the initial stiffness and hysteretic properties of the joint were decreased,but the energy dissipation capacity was improved; with the increase of leg length of steel angle,the bearing capacity of joint decreased,the initial stiffness and hysteretic properties changed little while the energy dissipation capacity did not change significantly.

关 键 词：顶底角钢连接 节点域箱形 半刚性 弯矩-转角曲线 

分 类 号：TU391[建筑科学—结构工程]