西南交通大学学报2013，Vol.48Issue(3)：395-401,7.DOI:10.3969/j.issn.0258-2724.2013.03.001
基于热点应力法的正交异性钢桥面板疲劳验算
Fatigue Assessment of Orthotropic Steel Bridge Deck Based on Hot Spot Stress Method
摘要
Abstract
The hot spot stress method was applied to fatigue assessment to solve the problem of fatigue cracking in orthotropic steel bridge deck.In this method,the hot spot stresses at check positions were calculated using the linear extrapolation method of International Institute of Welding and the ANSYS sub-model method.Based on hot spot stress method,the process of fatigue assessment for orthotropic steel bridge deck was provided,and the related problems were investigated in a case study on Yongjiang railway cable-stayed bridge.The results show that compared with the nominal stress method,the hot spot stress method can better reflect the cracking essence of orthotropic steel bridge decks.The fatigue assessment made for the rib located at the joint between diaphragms and the rib of the orthotropic steel bridge deck of the Yongjiang bridge reveals that the fatigue life span of the structure is 73 years.关键词
铁路斜拉桥/钢箱梁/正交异性钢桥面板/热点应力法/疲劳验算Key words
cable-stayed railway bridge/steel box girder/orthotropic steel bridge deck/hot spot stress method/fatigue assessment分类
交通工程引用本文复制引用
蒲黔辉,高立强,刘振标,施洲..基于热点应力法的正交异性钢桥面板疲劳验算[J].西南交通大学学报,2013,48(3):395-401,7.基金项目
铁道部重点课题资助项目(2009G004-C-2) （2009G004-C-2）
国家自然科学基金资助项目(51108382) （51108382）
