Behavior of thick-walled CHS X-joints under cyclic out-of-plane bending

被引：49
|
作者：
Wang, Wei [1 ,2 ,3 ]
Chen, Yiyi [1 ,2 ]
Meng, Xiande [1 ]
Leon, Roberto T. [3 ]
机构：
[1] Tongji Univ, Dept Struct Engn, Shanghai 200092, Peoples R China
[2] State Key Lab Disaster Reduct Civil Engn, Shanghai 200092, Peoples R China
[3] Georgia Tech, Sch Civil & Environm Engn, Atlanta, GA 30332 USA
来源：
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH | 2010年 / 66卷 / 06期
基金：
中国国家自然科学基金;
关键词：
CHS Joints; Out-of-plane bending; Seismic behavior; Experiments; FE analysis; TUBULAR JOINTS; HYSTERETIC BEHAVIOR;
D O I：
10.1016/j.jcsr.2010.01.014
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This paper deals with experimental investigations to study the seismic behavior of thick-walled circular hollow section (CHS) X-joints subjected to out-of-plane bending (OPB). Important geometric parameters were varied in designing three full-scale joint specimens in order to evaluate their effect on connection behavior. Test results indicated that the failure modes and the connection efficiency of these joints significantly depended on the brace-to-chord thickness ratio tau and the brace-to-chord diameter ratio beta. The tension fracture was identified as a critical failure mode for thick-walled X-joints with large beta. CHS X-joints with larger beta ratio were found to demonstrate better connection ductility and more satisfactory energy dissipating capacity than those joints with smaller beta ratio under cyclic OPB loading. This observation was further verified by the proposed simplified analytical model results. Finite element (FE) analyses were performed to simulate the experimental behavior and facilitate the interpretation of the important test observations. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：826 / 834
页数：9
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