Stress characteristics and cracking mechanism of web-to-stiffener weld in steel plate girder bridges under bending-shear action

doi:10.1016/j.istruc.2024.107088

	Stress characteristics and cracking mechanism of web-to-stiffener weld in steel plate girder bridges under bending-shear action
	Yao, Yue 1,2; Fu, Zhongqiu 2; Ji, Bohai 2; Wang, Qiudong 3; Gong, Yunhao 4
	2024-10
发表期刊	STRUCTURES
ISSN	2352-0124
卷号	68
摘要	The web-to-stiffener weld was subjected to bending-shear action, which was always neglected in previous research and affected the accuracy of fatigue evaluation. In this study, multi-scale FEMs (finite element models) of steel plate girder bridges were established to investigate the deformation characteristics, thus revealing the generating mechanism of bending-shear action. The fatigue comparison tests under bending-shear load and bending load were conducted to identify the cracking mechanism and its impact. The stress characteristics at the weld end were further explored through the structural mechanical model and verified by FEMs. The results show that the bending-shear action was caused by the inward and downward pulling by the stiffener on the web, and would lead to a premature transition from fatigue cracking to brittle fracture. The ratio of shear stress to normal stress was independent of load, inversely proportional to gap height, and positively related to web thickness, which could provide support for the accurate fatigue evaluation of web-to-stiffener weld.
关键词	Steel plate girder bridge Web-to-stiffener weld Bending-shear action Fatigue
其他关键词	FATIGUE DAMAGE
DOI	10.1016/j.istruc.2024.107088
收录类别	SCIE
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Civil
WOS记录号	WOS:001299608700001
出版者	ELSEVIER SCIENCE INC
原始文献类型	Article
引用统计	被引频次[WOS]：0 [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.library.ouchn.edu.cn/handle/39V7QQFX/171605
专题	国家开放大学江苏分部
通讯作者	Fu, Zhongqiu
作者单位	1.Jiangsu Open Univ, Coll Civil Engn, Nanjing 210036, Peoples R China; 2.Hohai Univ, Coll Civil & Transportat Engn, Nanjing 210024, Peoples R China; 3.Nanjing Forestry Univ, Coll Civil Engn, Nanjing 210037, Peoples R China; 4.China Construct Eighth Engn Div Corp Ltd, Shanghai 200112, Peoples R China
第一作者单位	国家开放大学江苏分部
第一作者的第一单位	国家开放大学江苏分部
推荐引用方式 GB/T 7714	Yao, Yue,Fu, Zhongqiu,Ji, Bohai,et al. Stress characteristics and cracking mechanism of web-to-stiffener weld in steel plate girder bridges under bending-shear action[J]. STRUCTURES,2024,68.
APA	Yao, Yue,Fu, Zhongqiu,Ji, Bohai,Wang, Qiudong,&Gong, Yunhao.(2024).Stress characteristics and cracking mechanism of web-to-stiffener weld in steel plate girder bridges under bending-shear action.STRUCTURES,68.
MLA	Yao, Yue,et al."Stress characteristics and cracking mechanism of web-to-stiffener weld in steel plate girder bridges under bending-shear action".STRUCTURES 68(2024).