“互”形节点钢框架抗震性能的有限元分析  

Finite Element Analysis of Seismic Behavior of Steel Frame with“HU”Joints

作　　者：方郓龙 郁有升[1] FANG Yunlong;YU Yousheng(School of Civil Engineering of Qingdao University of Technology,Qingdao 266525,China)

机构地区：[1]青岛理工大学土木工程学院,青岛266525

出　　处：《结构工程师》2023年第1期79-90,共12页Structural Engineers

基　　金：山东省自然科学基金项目(ZR2017MEE068)。

摘　　要：为研究“互”形节点钢框架的抗震性能,设计了三种不同节点形式的一榀两层单跨钢框架,分别为无悬臂梁段普通标准连接节点钢框架OSF、带悬臂梁段普通栓焊混合连接节点钢框架OHF和“互”形节点钢框架HXF,利用有限元软件ABAQUS对三种节点形式的钢框架进行了拟静力加载分析。同时,为分析P-Δ效应对“互”形节点钢框架抗震性能的影响,对5种不同荷载工况下的“互”形节点钢框架模型进行了有限元模拟。有限元分析结果表明:与其他节点形式钢框架相比“,互”形节点钢框架滞回曲线更加饱满,滞回环的面积更大,延性更好,刚度退化更慢,耗能能力更强。受P-Δ效应影响,柱顶竖向荷载越大“,互”形节点钢框架的极限承载力和耗能能力下降越显著。在施加柱顶荷载时,柱顶集中力作用工况下的“互”形节点钢框架受P-Δ效应影响更加显著,更符合真实的工况环境;梁上荷载对“互”形节点钢框架的极限承载力和延性影响较大,在设计时不应忽略。In order to study the seismic performance of steel frames with“HU”joints,a one-bay,two-story single-span steel frame with three different joints was designed,which were common bolt-welded mixed joint steel frame without cantilever beam OSF,OHF frame with cantilever beam,and HXF frame with“HU”joints.The finite element software ABAQUS was used to analyze the performance of three kinds of steel frames under quasi-static loading.In order to analyze the influence of P-Δeffect on the seismic performance of steel frames with“HU”joints,finite element simulations under five different loading conditions were carried out.The finite element analysis results show that the"HU"steel frames have fuller hysteresis curves,larger hysteresis loops area,better ductility,slower stiffness degradation and greater energy dissipation than other steel frames.Under the influence of P-Δeffect,the ultimate bearing capacity and energy dissipation capacity of steel frames with"HU"joints decreased significantly with the increase of vertical load at the column top.The P-Δeffect is more pronounced under the action of concentrated forces at the column top that match the actual working conditions.Beam loading has a great influence on ultimate bearing capacity and ductility of the steel frame with“HU”joints,which should not be ignored in design.

关 键 词：翼缘拼接板 耗能能力 刚度退化 P-Δ效应 

分 类 号：TU391[建筑科学—结构工程] TU352.11