盖板式外加强环圆钢管柱-H形钢梁节点抗震性能的有限元分析  

Finite Element Analysis on the Seismic Behavior of Circular Steel Tubular Column to H-shaped Steel Beam Joint with Cover-Plate Externally Strengthened Ring

作　　者：徐培蓁[1] 陈超 杨雷 朱亚光[1] XU Peizhen;CHEN Chao;YANG Lei;ZHU Yaguang(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033

出　　处：《建筑钢结构进展》2021年第2期14-21,共8页Progress in Steel Building Structures

基　　金：国家自然科学基金(51578342)。

摘　　要：为研究盖板式外加强环圆钢管柱-H形钢梁节点的破坏特征和抗震性能,设计了柱径厚比、柱环径厚比、柱梁径宽比及梁腹板高厚比四类参数,通过ABAQUS软件对其进行有限元分析,探讨各参数对节点破坏模态、滞回曲线、骨架曲线、刚度退化、延性性能及耗能能力的影响。结果表明,该类节点破坏模态受各参数变化的影响,在节点核心区剪切破坏和梁端塑性铰破坏之间转变;节点的滞回曲线饱满,具有较好的延性和较强的能量耗散能力;骨架曲线、刚度退化受柱径厚比的影响显著;节点的极限承载力随着柱径厚比、柱梁径宽比及梁腹板高厚比的减小均有不同程度的提高。In order to investigate the failure mechanism and seismic behavior of circular steel tubular column to H-shaped steel beam joint with cover-plate externally strengthened ring,four parameters,including the ratio of diameter to thickness of the column,the ratio of the diameter of column to thickness of the strengthened ring,the ratio of diameter of column to width of the beam,and the ratio of height to thickness of beam web were designed.All of these parameters are analyzed using ABAQUS for evaluating their impacts to failure mode,hysteretic curve,skeleton curve,stiffness degradation,ductility and energy dissipation capacity.The results show that the failure modes of joints are affected by various parameters and transformed between the shear destruction in the core area of the joint and the destruction of plastic hinge at beam end.The hysteretic curves of the joints are full,with a good ductility and energy dissipation capacity.The skeleton curves and stiffness degradation are significantly affected by the ratio of diameter to thickness of the column.The ultimate bearing capacity of the joints increases with a decrease in the ratio of diameter to thickness of the column,the ratio of column diameter to beam width,and the ratio of height to thickness of beam web.

关 键 词：圆钢管柱-H形钢梁节点 有限元分析 抗震性能 破坏模态 参数分析 

分 类 号：TU352.1[建筑科学—结构工程] TU973.17