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

页数：11

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