Fatigue Performance and Life Evaluation of Orthotropic Steel Deck of Main Bridge of Mingzhu Bay Bridge

被引：0
|
作者：
Liu P. [1 ]
Chen Y. [1 ]
Zhao J. [2 ]
An B. [2 ]
Wang Y. [3 ]
机构：
[1] School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang
[2] China Railway Bridge Engineering Bureau Group Co.Ltd., Tianjin
[3] School of Civil Engineering, Tsinghua University, Beijing
来源：
Bridge Construction | 2023年 / 53卷 / 06期
关键词：
fatigue life; fatigue performance; fatigue test; nominal stress method; orthotropic steel deck; structural details;
D O I：
10.20051/j.issn.1003-4722.2023.06.006
中图分类号：
学科分类号：
摘要：
Eight full-scale single-U-rib specimens were prepared for fatigue test to study the fatigue performance and evaluate the fatigue life of the orthotropic steel deck of the main bridge of Mingzhu Bay Bridge in Guangzhou. The specimens were fabricated in accordance with the design dimensions and structural details of the real bridge as well as the same site welding conditions. The fatigue failure vulnerable points and fatigue life curve of the deck were determined. Numerical simulation was conducted to analyze the fatigue behavior of the deck under actual vehicle loads, and the nominal stress method was used to predict the fatigue life the deck. The results demonstrate that the U rib-to-deck joints and the U rib-to-diaphragm joints are the fatigue vulnerable points, at 5 million cycles, the normal fatigue limits of the two locations are 42. 04 MPa and 60. 30 MPa, respectively. The maximum stress range of the U rib-to-deck joint is 14. 02 MPa, less than the normal fatigue limit, the fatigue life is not a concern. The maximum stress range of the U rib-to-diaphragm joint is 64. 73 MPa, greater than the normal fatigue limit,the fatigue life is predicted to be 158 years? exceeding the bridge design life of 100 years. © 2023 Wuhan Bridge Research Institute. All rights reserved.
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页码：41 / 46
页数：5
相关论文
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