冲压成型过程对焊接空心球节点力学性能影响研究  

Study on influence of stamping and forming process on mechanical properties of welded hollow spherical joints

作　　者：刘红波 高昊天[2] 陈志华 邱灿[1] LIU Hongbo;GAO Haotian;CHEN Zhihua;QIU Can(School of Civil Engineering,Hebei University of Engineering,Handan 056038,China;Key Laboratory of Coastal Civil Engineering Structure and Safety,Ministry of Education,Tianjin University,Tianjin 300072,China)

机构地区：[1]河北工程大学土木工程学院,邯郸056038 [2]天津大学滨海土木工程结构与安全教育部重点实验室,天津300072

出　　处：《建筑结构》2023年第3期103-108,共6页Building Structure

基　　金：国家自然科学基金面上项目(51878443)。

摘　　要：焊接空心球节点在制作和焊接过程中,会引起壁厚减薄率和焊接残余应力等初始缺陷,从而导致节点的力学性能的明显变化。采用有限元数值模拟方法,研究了焊接空心球节点制作和焊接过程中,壁厚减薄率和焊接残余应力的形成机理,研究了其对焊接空心球节点极限承载力的影响规律,发现壁厚减薄率和焊接残余应力对节点力学性能有较为显著的影响,建议在今后设计时适当考虑。In the manufacture and welding process of welded hollow spherical joints(WHSJs), initial imperfection such as wall thickness reduction and welded residual stress will be caused, which will lead to obvious changes in mechanical properties of joints. The formation mechanism and influence on the ultimate bearing capacity of wall thickness reduction and welded residual stress caused by manufacture and welding process of WHSJs was studied by using the finite element analysis method. The results show that the wall thickness reduction and welded residual stress have significant effects on the mechanical properties of WHSJs, which should be considered properly in the future design.

关 键 词：焊接空心球节点 冲压过程 焊接残余应力 壁厚减薄率 极限承载力 

分 类 号：TU391[建筑科学—结构工程]