Q460高强钢管柱-H形梁焊接节点循环拉伸性能试验研究  

Experimental study on cyclic tensile performance of tube column andH beam welded joint using Q460 high strength steel

作　　者：梁刚 陆志涵[1] 刘云贺 郭宏超[1,2] LIANG Gang;LU Zhihan;LIU Yunhe;GUO Hongchao(School of Civil Engineering and Architecture,Xi’an University of Technology,Xi’an 710048,China;State Key Laboratory of Eco-hydraulics in Northwest Arid Region,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学土木建筑工程学院,西安710048 [2]西安理工大学省部共建西北旱区生态水利国家重点实验室,西安710048

出　　处：《振动与冲击》2024年第4期303-313,共11页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51978571);中国博士后科学基金(2022M712562);陕西省自然科学基金项目(2020JQ-628);陕西省教育厅项目(21JK0795)。

摘　　要：为研究Q460高强钢管柱-H形梁焊接节点在地震作用下的力学行为,对11个梁翼缘板与柱段焊接组成的节点进行了低周循环拉伸性能试验,研究了梁翼缘板与钢管宽度比α、厚度比β以及钢管宽厚比λ等参数对节点破坏模式、承载力、延性和耗能能力的影响规律。结果表明:在循环拉伸荷载作用下,Q460高强钢管柱-H形梁焊接节点的失效模式主要分为连接处焊缝断裂、连接处钢管面板断裂或梁翼缘板被拉断三种;高强钢梁翼缘板与钢管宽度比、钢管柱宽厚比对焊接节点的受力行为影响较大,当宽厚比α由25.0减小到18.75时,节点的应变能减小了134%;当节点破坏时,具有新型焊接通过孔构造的焊接节点极限位移超过传统构造节点近2倍,前者延性性能较好。研究成果可为高强钢管柱与梁焊接节点的抗震设计以及进一步的理论研究提供依据。To study the mechanical behavior of tube column and H beam welded joint with Q460 high strength steel(HSS)under earthquake,11 specimens consisting of a flange plate of H-shaped beams that were welded to rectangular columns were tested under a cyclic tensile condition.The effects of the width ratio of the beam flange plate to the tube column,thickness ratio of the tube column on the failure mode,bearing capacity,ductility and energy dissipation capacity of the joint were studied.Results show that the failure modes of the tube column and H beam welded joint using Q460 HSS were mainly divided into three types after the cyclic tensile test:weld fracture at the connection,fracture failure of the tube column panel at the connection or tensile fracture of the beam flange.The width ratioαand the width thickness ratioλhave a greater impact on the mechanical behavior of welded joints with HSS,whenαdecreases from 25.0 to 18.75,the strain energy of the joint decreases by 134%.In addition,when a joint was damaged,the ultimate displacement of a welded joint with a new type of welded access hole construction is nearly two times greater than that of a traditional construction joint,and the former has better ductility.The results can provide a basis for seismic design and further theoretical research of tube column and H beam welded joint with HSS.

关 键 词：高强钢 焊接节点 循环拉伸试验 破坏模式 耗能能力 

分 类 号：TU391.01[建筑科学—结构工程] TU317.01