小型承重立柱桁架结构设计及其焊接性能分析

小型承重立柱桁架结构设计及其焊接性能分析 Structural design and welding performance analysis of small load-bearing column truss 张苹 ZHANG Ping 1 first-author 张潇然 ZHANG Xiaoran 2 张元彬 ZHANG Yuanbin 1 山东建筑大学材料科学与工程学院 山东建筑大学材料科学与工程学院 Materials Science and Engineering School,Shandong Jianzhu University Materials Science and Engineering School,Shandong Jianzhu University 新南威尔士大学土木与环境工程学院 新南威尔士大学土木与环境工程学院 School of Civil and Environmental Engineering,University of New South Wales School of Civil and Environmental Engineering,University of New South Wales 设计了一个高度为180 mm的小型承重立柱桁架结构,通过失稳理论计算、实物承压测试,确定采用由六组立杆和三个圆环组成的圆柱形桁架结构,三个直径为56 mm的圆环分别位于顶面、底面和中间位置,且中间圆环采用比上下圆环直径略细的钢棒,六组立杆沿圆周均匀排列,每组两根立杆分别位于圆环内侧和外侧,并在同一个轴截面内。圆环的对接接头采用钨极氩弧焊焊接,圆环与立杆采用电阻点焊焊接。试验测试桁架的最大承载力为17 800 N,最大承载力与质量之比为82 N/g。 By theoretical instability calculation and physical bearing test,a small load-bearing cylindrical truss with 180 mm height is designed,which consisting of six groups of vertical rods and three rings. The three rings with diameter of 56 mm are located at the top,the bottom and the middle of the truss respectively,and the middle ring is made of steel bars with a slightly smaller diameter than the upper and lower rings. The six groups of vertical rods are arranged uniformly along the circumference,and the two vertical rods in each group is located inside and outside of the rings respectively,and in the same shaft section of the columns truss. The butt joints of the rings are welded by TIG welding,while the joints between the rings and the vertical rods are welded by resistance spot welding. The maximum load bearing capacity of the truss is 17 800 N,and the ratio of the maximum load bearing capacity to the mass is 82 N/g. 立柱桁架 承重 结构设计 焊接性能 column truss load bearing structural design welding performance TG457.11 2022-03-08 10 50