Experimental study on cyclic tensile performance of tube column and H beam welded joint using Q460 high strength steel
LIANG Gang1,2, LU Zhihan1, LIU Yunhe1,2, GUO Hongchao1,2
1.School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an 710048, China;
2.State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
Abstract：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 flange plate of H-shaped beams that were welded to rectangular columns at flange plates 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 are studied. The results show that the failure modes of the tube column and H beam welded joint using Q460 HSS are 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 ratio α and the width thickness ratio λ have a greater impact on the mechanical behavior of welded joints with HSS, when α decreases 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 research results can provide a basis for seismic design and further theoretical research of tube column and H beam welded joint with HSS.
梁刚1,2，陆志涵1，刘云贺1,2，郭宏超1,2. Q460高强钢管柱-H形梁焊接节点循环拉伸性能试验研究[J]. 振动与冲击, 2024, 43(4): 303-313.
LIANG Gang1,2, LU Zhihan1, LIU Yunhe1,2, GUO Hongchao1,2. Experimental study on cyclic tensile performance of tube column and H beam welded joint using Q460 high strength steel. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(4): 303-313.
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