Experimental investigation on fatigue behavior of butt-welded high-strength steel plates

被引：20
|
作者：
Tong, Lewei [1 ,2 ]
Niu, Lichao [1 ]
Ren, Zhenzhen [1 ]
Zhao, Xiao-Ling [3 ]
机构：
[1] Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai 200092, Peoples R China
[2] Tongji Univ, Zhejiang Coll, Dept Civil Engn, Shanghai 314051, Peoples R China
[3] UNSW Sydney, Dept Civil & Environm Engn, Sydney, NSW 2052, Australia
来源：
THIN-WALLED STRUCTURES | 2021年 / 165卷
基金：
中国国家自然科学基金;
关键词：
High strength steel; Butt-welded connections; Mechanical properties; S-N curves; Fatigue; PERFORMANCE; SECTIONS; MICROSTRUCTURE; JOINTS;
D O I：
10.1016/j.tws.2021.107956
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This paper presents an experimental investigation into mechanical properties and fatigue performance of butt welded high strength steel plates. Four typical high-strength steels (HSSs) were selected, with steel grades of 460, 550, 690, and 960 MPa. Mechanical properties were measured through monotonic tensile tests, cold bending tests, Charpy V-notch impact tests and hardness tests. A total of 114 fatigue tests were conducted on butt-welded high-strength steel plates. Comparisons of mechanical properties and fatigue performance are made among HSSs tested and conventional strength steels (CSSs) with a yield strength around 235 to 355 MPa. The natural slope of S-N curves for HSS butt-welded connections varied from 3 to 5. Two fatigue design approaches are recommended with one based on natural slope and one based on a fixed slope of 3 as for CSSs.
引用
收藏
页数：11
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