|Table of Contents|

Orthogonalization Calculation of Fatigue Stress for U-rib Orthotropic Steel Deck of Rail Transit Box Girder(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2020年06期
Page:
100-107
Research Field:
Publishing date:

Info

Title:
Orthogonalization Calculation of Fatigue Stress for U-rib Orthotropic Steel Deck of Rail Transit Box Girder
Author(s):
YE Hua-wen1 DUAN Zhi-chao1 WANG Tian-qi1 LIU An-shuang2 QI Yong2
1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. T. Y. Lin International Engineering Consulting Co., Ltd., Chongqing 401121, China
Keywords:
urban rail transit bridge orthotropic steel deck U-rib fatigue stress orthogonalization method
PACS:
TU391
DOI:
-
Abstract:
In order to obtain the fatigue stress of orthotropic steel deck of urban rail transit box girder, an orthogonalization method was proposed based on finite element analysis method. Firstly, the longitudinal and lateral influence scope and the most unfavorable loading position were obtained for the typical orthotropic steel deck under the urban rail loadings, and the influences of key parameters were analyzed, such as the stiffness of damping pad, suspended diaphragm and stringer as well as ballast bed. Then the benchmark of the U-rib orthotropic steel deck of rail transit box girder was also proposed according to numerous engineering data statistics, meanwhile the finite element model was also established,and the influence coefficient was calculated based on the parameters including deck plate thickness, diaphragm height, diaphragm spacing, stringer height and two cutout shapes. Finally, the reliability and applicability of the orthogonalization method was validated by several examples. The results show that the structural stress under fatigue load of urban rail A is the most unfavorable. The stiffness of stringer has a significant influence on the fatigue stress.

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