不同焊接方式下钢管桁架KK型搭接节点有限元分析.PDFVIP

CA M EO 凯 模 CA E案 例 库 ww w. ca m eo .or g.c n [文章编号] 1002-8528( 2008) 09-0001-05 不同焊接方式下 钢管桁架 KK 型搭接节点有限元分析 杨文伟1 ,王秀丽2( 1.宁夏大学基建处 ,银川 750021; 2.兰州理工大学土木工程学院,兰州 730050) [摘 要] KK型圆钢管搭接节点,搭接处隐藏焊缝焊接与否的问题, 现行钢结构设计规范( GB50017-2003)未作明确要求。 本文利用ANSYS 非线性有限元法,分析了搭接节点隐藏焊缝在焊与不焊2 种不同焊接方式下,搭接节点的支主管管径比 、径 厚比 、支主管厚度比 对节点极限承载力的影响。同时分析了在低周往复荷载作用下,搭接节点隐藏焊缝在焊与不焊 2 种 焊接方式下的滞回性能,并给出了滞回曲线。搭接节点不论对角支管相贯通还是一侧支管贯通, 隐藏焊缝焊与不焊对节点最 终破坏模式影响不大,对节点承载能力的影响也不是十分显著,隐藏焊缝不焊接节点滞回性能优于隐藏焊缝焊接节点。实际 工程中隐藏焊缝可以不焊接。 [关键词] KK型搭接节点 ;隐藏焊缝; 极限承载力;有限元分析; 滞回性能 [中图分类号] TU391; TU392 3 [文献标识码] A Finite Element Analysis for Unstiffened Overlapped CHS KK-Joints Welded in Different Ways YANG Wen-wei ( Capital construction office, Ningx ia University , Yinchuan 750021, China) WANG Xiu-li ( School of Civil Engineering, Lanzhou University of Technology , Lanzhou 730050, China) [Abstract] The question whether hidden weld in unstiffened overlapped CHS KK- joints is welded or not is not clearly metioned in current code for design of steel structures( GB50017-2003) . This paper mainly analyzes the influence of chord-to-brace diameter ratio , diameter- to- ply ratio and brace-to- chord ply ratio on the ultimate bearing capacity of the joints with the hidden weld welded in two different ways. the influence of welded and non-welded hidden welds of the joints on hysteretic property under low frequency loading is analyzed, and hystertic loops of the joints are obtained by using the ANSYS finite element method. The hidden weld of the joints, no matter which is same side brace or opposite brace, only has slight influence on the failure modes and limit capacity of the joints. Hysteretic property of the joints in which the hidden weld is non-welded is much better than the welded, so in project the joints with the hidden weld can be non-welded. [Key words] overlapped CHS KK- joints; hidden weld; ultimate capacity; finite element analysis; hysteretic property [收稿日期] 2008-01-10 [基金项目] 宁夏大学自然科学基金项目( ZR0633) ; 2008年宁夏自治区自然科学基金( NZ0817) [作者简介]