Fatigue Damage Evaluation of Orthotropic Steel Deck Considering Weld Residual Stress Relaxation Based on Continuum Damage Mechanics

被引：24

作者：

Cui, Chuang ^{[1
]}

Zhang, Qinghua ^{[1
]}

Bao, Yi ^{[2
]}

Bu, Yizhi ^{[1
]}

Ye, Zhongtao ^{[3
]}

机构：

[1] Southwest Jiaotong Univ, Dept Bridge Engn, 111 Sect Northbound 1,Second Ring Rd, Chengdu 610031, Sichuan, Peoples R China

[2] Univ Michigan, Dept Civil & Environm Engn, Ann Arbor, MI 48109 USA

[3] State Key Lab Bridge Struct Hlth & Safety, 103 JianShe Rd, Wuhan 430034, Hubei, Peoples R China

来源：

JOURNAL OF BRIDGE ENGINEERING | 2018年 / 23卷 / 10期

基金：

美国国家科学基金会;

关键词：

Orthotropic steel deck (OSD); Fatigue evaluation; Weld residual stress; Fatigue damage model; Weld residual stress relaxation; MODEL; CONNECTIONS; STRENGTH; DESIGN; JOINTS; TESTS; PLATE; SCALE; LOAD;

D O I：

10.1061/(ASCE)BE.1943-5592.0001280

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Weld residual stresses (WRSs) in orthotropic steel decks (OSDs) contribute prominently to fatigue damage. WRSs relax during the accumulation of fatigue damage. However, their effects are ignored in conventional methods of fatigue damage evaluation. This paper presents the first evaluation approach to fatigue damage that considers of the relaxation of WRSs. WRSs were analyzed using a thermomechanical analysis that took into account the relaxation of WRS. An elastic-plastic fatigue damage model was developed using continuum damage mechanics. The proposed model of fatigue damage was experimentally validated using fatigue tests on U-rib weld connection specimens under different cyclic loading conditions. The test results indicated the feasibility of the elastic-plastic fatigue damage model for predicting WRSs and fatigue damage in OSDs. Ignoring the effects of WRSs may result in the overestimation of fatigue life, resulting in structural designs that are not conservative enough.

引用

页数：10

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