翼缘连接板削弱型上焊下栓钢梁柱节点抗震性能有限元分析  

Finite element analysis of seismic behavior of bottom-flange-bolted and top-flange-welded steel beam-column joints with reduced flange connection plate

作　　者：巴金璐 董锦坤[1] BA Jinlu;DONG Jinkun(School of Civil and Architectural Engineering,Liaoning University of Technology,Jinzhou 121001,Liaoning,China)

机构地区：[1]辽宁工业大学土木建筑工程学院,辽宁锦州121001

出　　处：《地震工程学报》2024年第5期1118-1125,共8页China Earthquake Engineering Journal

基　　金：辽宁省自然科学基金面上项目(2023-MS-298)。

摘　　要：分析不同参数对节点抗震性能的影响,为梁柱翼缘连接板削弱型上焊下栓钢结构梁柱节点的设计提供参考。通过改变下翼缘连接板削弱区长度和框架梁截面形状,设计7组算例,利用有限元软件ABAQUS对翼缘连接板削弱型上焊下栓钢梁柱节点进行有限元分析,研究其破坏模式、滞回曲线、骨架曲线、最大承载力和螺栓孔径变化率。有限元分析结果表明:下翼缘连接板削弱长度过短无法达到塑性铰外移的目的,削弱长度过长则会导致严重的平面外屈曲;梁全截面削弱组的抗震性能优于半截面削弱组与无变化组。翼缘连接板削弱型上焊下栓钢梁柱节点能有效利用翼缘连接板削弱区的塑性变形、拼接区螺栓的滑移、螺栓杆与孔壁的挤压,以及板件的摩擦来实现耗能。This study investigates the impact of various parameters on the seismic performance of beam-column joints,contributing to the design reference for bottom-flange-bolted and top-flange-welded steel beam-column joints with reduced flange connection plates.Seven specimens were designed based on the changes in the reduced zone length of lower flange connection plates and different cross-sectional sizes of frame beams.The finite element software ABAQUS was used to analyze the seismic behavior of beam-column joints,including the failure mechanism,hysteretic loop,skeleton curve,maximum load capacity,and bolt-hole expansion rate.The results show that a short length of the reduced zone in the lower flange will fail to facilitate the outward shift of plastic hinges,while an excessive length would result in notable out-of-plane buckling.The seismic performance of beam-column joints with reduced full-section is superior to the other two types.In this paper,the bottom-flange-bolted and top-flange-welded steel beam-column joints with reduced flange connection plates can effectively improve the energy consumption capacity of the structure.

关 键 词：钢结构 梁柱节点 抗震性能 有限元分析 

分 类 号：TU391[建筑科学—结构工程]