Experimental and numerical study of high-strength steel butt weld with softened HAZ

被引：16
作者：
Sun, Feifei [1 ]
Ran, Mingming [2 ]
Li, Guoqiang [1 ]
Xiao, Robert Y. [3 ]
Wang, Yan [4 ]
机构：
[1] Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai, Peoples R China
[2] Tongji Univ, Coll Civil Engn, Shanghai, Peoples R China
[3] London South Bank Univ, London, England
[4] BAOSTEEL Construct Co Ltd, Tech Dept, Shanghai, Peoples R China
来源：
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-STRUCTURES AND BUILDINGS | 2018年 / 171卷 / 08期
关键词：
failure; steel structures; strength & testing of materials; MECHANICAL-PROPERTIES; PLATE THICKNESS; JOINTS; MICROSTRUCTURE; METAL; ZONE;
D O I：
10.1680/jstbu.16.00102
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Static tensile tests were conducted on 26 butt welded joints on base steel of Q690 grade high-strength steel, which exhibits softening behaviour in the heat-affected zone (HAZ). Considering the challenges involved in simulating the butt weld with the HAZ, a new method was proposed for calibrating the true stress-strain relationship based on a trial-and-error approach using simulation through comparing the load-deformation response for three materials (base metal, weld metal and HAZ) in a butt weld. Good consistency on the load-deformation response between the simulation and the test was observed, validating the proposed method. Parametric study showed that the relative width of the softened zone and matching ratio have a significant influence on the ultimate strength of the butt weld and BS EN 1993-1-12 cannot be used directly to design a butt weld with a soft interlayer in the HAZ of high-strength steel.
引用
收藏
页码：583 / 597
页数：15
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