哈尔滨工程大学学报2012，Vol.33Issue(12)：1486-1491,1514,7.DOI:10.3969/j.issn.1006-7043.201202026
管桁结构K型搭接节点滞回性能有限元数值分析
Numerical analysis of hysteretic behavior of unstiffened overlapped CHS K-joints in steel pipe structures by finite element method
摘要
Abstract
In the truss structure of a steel pipe, the question remains unclear whether hidden weld in unstiffened o-verlapped circular hollow sections (CHS) joints is welded or un-welded as has been previously mentioned in Chinas steel structures design codes ( GB500172-2003 ). In an effort to reveal the seismic performance of welded or un-welded hidden weld of the CHS K-joints, an experimental study, examining the hysteretic behavior of the CHS K-joints under cyclic loads was studied numerically utilizing the finite element method, i. e. ANSYS finite element software. Finite element models were set up and used to calculate the CHS K-joints with three-dimensional 4-node structural elastoplastic shell elements (shelll81). The data of hysteretic curves, skeleton curves and the stress distributions around the intersections were obtained by the finite element analysis for the CHS K-joints respectively. The results show that in unstiffened overlapped CHS K-joints, hysteretic performance of un-welded hidden weld is superior to the welded. The maximum stress of the CHS K-joints occurs mainly in the section where the two bracing members overlap, therefore, the overlapping ratio of overlap joints should remain as small as possible. All of the numerical analysis results were in agreement, approximately with the corresponding test results for the CHS K-joints, which also verifies the applicability and reliability of the finite element method in the study of hysteretic behavior of tubular joints.关键词
结构工程/空心管结构/桁架/K型搭接节点/滞回性能/有限元方法/试验研究Key words
structural engineering/ hollow structural section/ truss/ unstiffened overlapped CHS K-joints/ hysteret-ic behavior/ finite element method/ experimental study分类
建筑与水利引用本文复制引用
杨文伟,王秀丽..管桁结构K型搭接节点滞回性能有限元数值分析[J].哈尔滨工程大学学报,2012,33(12):1486-1491,1514,7.基金项目
国家自然科学基金资助项目(50968014,51068019) （50968014,51068019）
宁夏区自然科学基金资助项目(NZ12164). （NZ12164）
