Study on fatigue life of orthotropic steel deck for urban rail transit based on fatigue model test and FEM modelling-Reference-Cited by-同舟云学术

Study on fatigue life of orthotropic steel deck for urban rail transit based on fatigue model test and FEM modelling

Published:2022-11-24 Issue: Volume: Page:
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Author:

ZENG Yong¹,WANG Shenxu¹,XUE Xiaofang¹,TAN Hongmei¹,ZHOU Jianting¹

Affiliation:

1. Chongqing Jiaotong University

Abstract

Abstract Orthotropic steel deck (OSD) structures are widely used in the bridge deck system of rail transit bridges. Reducing the amplitude of stress intensity factor is the most effective method to improve the fatigue life of OSD structures. In order to explore the fatigue crack propagation of OSD structure and the factors affecting the amplitude of structural stress intensity factor, linear elastic fracture mechanics and paris law is used for theoretical support in this paper. Firstly, a cable-stayed bridge of urban rail transit is taken as the research object, and a full-scale segment model of OSD structure is designed and static and fatigue tests are carried out. Based on the test data, the fatigue life of the structure is simulated and predicted. Finally, ABAQUS and Franc3D are used to analyze the influence of parameters, such as U-rib thickness, roof thickness and diaphragm thickness of OSD structure, on the amplitude of stress intensity factor. The test and FEM analysis results show that, the thickness of diaphragm and the height of U-rib have little effect on the fatigue life of OSD structure, appropriately increasing the thickness of top plate and U-rib has a positive significance for prolonging the fatigue life of the structure.

Publisher

Research Square Platform LLC

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