单向螺栓端板连接节点抗震性能数值分析  

Numerical analysis of seismic performance of unidirectional bolt end-plate joints

作　　者：韩志鹏 刘伟 杨睿 HAN Zhi-peng;LIU Wei;YANG Rui(School of Urban Construction&Transportation,Hefei University,Hefei 230601,China)

机构地区：[1]合肥大学城市建设与交通学院,安徽合肥230601

出　　处：《河南城建学院学报》2024年第6期16-24,40,共10页Journal of Henan University of Urban Construction

基　　金：安徽省自然科学基金面上项目(2108085ME189);安徽省高等学校自然科学研究重点项目(2024AH051538);安徽省高校学科(专业)拔尖人才学术资助项目(gxbjZD2022056)。

摘　　要：为深入探讨方钢管柱-H型梁单向螺栓端板连接节点抗震性能的影响因素,采用Abaqus有限元分析软件建立了9组有限元模型,分别对柱壁厚度、端板厚度、螺栓直径、柱轴压比、梁高度、梁翼缘厚度、梁腹板厚度、是否设置加劲肋及加劲肋厚度等参数进行了优化分析,研究了有限元模型的滞回曲线、骨架曲线、刚度退化和耗能能力等抗震性能指标。结果表明:当柱壁厚度从8 mm增至14 mm,节点的极限承载力和初始转动刚度分别提升91.6%、93.7%,相同加载位移的滞回耗能面积增大显著,等效黏滞阻尼系数增加50.0%;当梁的高度从200 mm增至350 mm,节点的极限承载力和初始转动刚度分别提升78.9%、157.1%,相同加载位移的滞回耗能面积增大显著,等效黏滞阻尼系数增加9.3%;其他参数的改变对节点的极限承载能力、初始转动刚度、等效黏滞阻尼系数和滞回耗能均有不同程度影响。To deeply explore the influencing factors of the seismic performance of the connection node between square steel tube columns and H-shaped beams with unidirectional bolt end-plate joints,9 sets of finite element models were established using Abaqus finite element analysis software.The optimization analysis focused on column wall thickness,end plate thickness,bolt diameter,axial compression ratio of the column,beam height,flange thickness of the beam,web thickness of the beam,stiffener arrangement,and stiffener thickness.The study examined the hysteresis loop,skeleton curve,stiffness degradation,and energy dissipation capacity of the finite element models as seismic performance indicators.The results show that when the column wall thickness increased from 8 mm to 14 mm,the ultimate load-bearing capacity and initial rotational stiffness of the node improved by 91.6% and 93.7%,respectively,and the area of hysteretic energy dissipation under the same loading displacement significantly increased,with the equivalent viscous damping coefficient increasing by 50.0%.When the beam height increased from 200 mm to 350 mm,the ultimate load-bearing capacity and initial rotational stiffness of the node improved by 78.9% and 157.1%,respectively,with a significant increase in the area of hysteretic energy dissipation under the same loading displacement and the equivalent viscous damping coefficient increasing by 9.3%.Changes in other parameters also had varying degrees of influence on the node′s ultimate load capacity,initial rotational stiffness,equivalent viscous damping coefficient,and hysteretic energy dissipation.

关 键 词：单向螺栓 抗震性能 滞回曲线 骨架曲线 刚度退化 耗能能力 

分 类 号：TU391[建筑科学—结构工程]