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

页码：583 / 597

页数：15

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