首页|单向载荷下高层建筑钢结构梁柱焊接节点的失效研究

单向载荷下高层建筑钢结构梁柱焊接节点的失效研究

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为确保高层建筑钢结构梁柱焊接节点在风载荷、地震载荷等单向载荷下具备抗裂性,保障高层建筑钢结构的安全,对单向载荷下高层建筑钢结构梁柱焊接节点断裂性能进行研究.设计单V坡口全熔透焊和角焊缝两种焊接形式的梁柱焊接节点试件,通过有限元模拟软件生成试件的三维模型,向试件施加单向载荷,用等效塑性应变指数(PI)、开裂指数(RI)及应力三轴度等分析试件的断裂形态.结果表明:在不同载荷阶段,单V坡口全熔透焊的PI指数、RI指数及应力三轴度均低于角焊缝焊接的试件,且随着载荷增加,单V坡口全熔透焊梁柱焊接节点的承载力未大幅下降.因此可知,单V坡口全熔透焊的焊接节点更适用于高层建筑钢结构.
Failure study of welded joints of steel structures in high-rise buildings under unidirectional loads
In order to ensure the crack resistance of welded joints of steel structures in high-rise buildings under unidirectional loads such as wind load and earthquake load,and to ensure the safety of steel structures in high-rise buildings,the fracture performance of welded joints of steel structures in high-rise buildings under unidirectional loads was studied.Two kinds of beam-column welded joint specimens with single V groove full penetration groove welding and fillet weld were designed.Three-dimensional models of the specimens were generated by finite element simulation software and unidirectional loads were applied to the specimens.The equivalent plastic strain index(PI),cracking index(RI)and stress triaxial degree were used to analyze the fracture morphology of the specimen when the load was applied.The results show that the PI index,RI index and stress triaxial degree of the beam-column welded joint specimens with single V beam-column weld are lower than those with fillet weld in different loading stages,and the bearing capacity of the beam-column welded joint specimens with single V beam-column weld with full penetration groove is not significantly reduced with the increase of load.Therefore,it can be seen that the welded joints of single-V bevelled all-penetration bevelled welding are more suitable for high-rise building steel structures.

unidirectional loadhigh-rise buildingssteel structurebeam and column welding jointscracking index

汪任凭、宋晓茜

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山西科技学院材料科学与工程学院,山西 晋城 048011

单向载荷 高层建筑 钢结构 梁柱焊接节点 开裂指数

2025

兵器材料科学与工程
中国兵工学会 中国兵器工业集团第52研究所

兵器材料科学与工程

北大核心
影响因子:0.334
ISSN:1004-244X
年,卷(期):2025.48(1)