Fatigue reliability assessment of light-weighted steel-UHPC composite bridge deck

被引：3
作者：
Deng L. [1 ]
Xian Y. [1 ]
Shao X. [1 ]
机构：
[1] School of Civil Engineering, Hunan University, Changsha
来源：
Deng, Lu (denglu@hnu.edu.cn) | 2018年 / Central South University of Technology卷 / 49期
基金：
中国国家自然科学基金;
关键词：
Fatigue cumulative damage model; Fatigue life; Fatigue reliability; Light-weighted composite bridge deck;
D O I：
10.11817/j.issn.1672-7207.2018.03.026
中图分类号：
学科分类号：
摘要：
In order to investigate the fatigue reliability of a light-weighted composite bridge deck consisting of a steel deck and an ultra-high performance concrete (UHPC) structural layer, a finite element model for a girder segment of the Humen Bridge in Guangdong Province was established. The fatigue reliability indexes of typical fatigue-prone details of the steel-UHPC composite bridge deck and the asphalt concrete pavement bridge deck were calculated and compared, and the influence of a few parameters including the UHPC layer thickness on the fatigue life of light-weighted composite bridge deck was investigated based on the reliability theory and fatigue cumulative damage model. The results show that compared to the asphalt concrete pavement bridge deck, the light-weighted composite bridge deck can effectively increase the fatigue reliability of fatigue-prone details and extend the fatigue life of the light-weighted composite bridge deck. UHPC layer thickness, traffic volume growth and vehicle overloading rate have a significant impact on the fatigue life of the fatigue details of the light-weighted composite bridge deck. A 10 mm increment of UHPC layer thickness (within range of 35-55 mm) can extend the fatigue life by at least 37%; 5% annual traffic volume growth rate can reduce the fatigue life by more than 45%, and 50% vehicle overloading rate can reduce the fatigue life by about 70%. © 2018, Central South University Press. All right reserved.
引用
收藏
页码：711 / 717
页数：6
相关论文
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