NUMERICAL ANALYSIS OF FATIGUE BEHAVIOR OF WELDED CFCHS T-JOINTS

被引：0

作者：

Gu, Min ^{[1
,2
]}

Tong, Le-Wei ^{[1
,2
]}

Zhao, Xiao-Ling ^{[3
]}

Zhang, Yun-Feng ^{[4
,5
]}

机构：

[1] Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai 200092, Peoples R China

[2] Tongji Univ, Coll Civil Engn, Shanghai 200092, Peoples R China

[3] Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia

[4] Univ Maryland, Dept Civil & Environm Engn, College Pk, MD 20742 USA

[5] Tongji Univ, Coll Civil Engn, Shanghai 200092, Peoples R China

来源：

ADVANCED STEEL CONSTRUCTION | 2014年 / 10卷 / 04期

关键词：

Concrete-filled circular hollow section; Welded joints; Fatigue life prediction; Fracture mechanics; Finite element analysis; STRESS INTENSITY FACTORS; TUBULAR JOINTS; SURFACE CRACK; K-JOINTS;

D O I：

暂无

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Fatigue life assessment of welded joints made of circular hollow sections (CHS) with concrete filled (CF) chord member subject to vehicle load is vital in designing of CFCHS arch truss bridge. A key issue in fatigue life assessment of such joints is how to accurately estimate the stress intensity factor. This paper describes a methodology for calculating the stress intensity factor of the hot spot region in the welded CFCHS T-joints based on a finite element analysis which considers weld modeling, crack modeling and nonlinear interface element between steel and concrete. A procedure for fatigue life estimation of welded CFCHS T-joints is also established. Discussions are made on the effect of the initial crack size and concrete strength on fatigue life and hot spot stresses. The majority of crack propagation life is found to be associated with the shallow crack stage. The proposed method gives reasonable estimation of fatigue life of welded CFCHS T-joints.

引用

页码：476 / 497

页数：22

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