Numerical and theoretical research on spatial shear lag effect of self-anchored suspension bridge steel box girder

Archives of civil engineering

article

Yanfeng Li¹  Ying He¹  Longsheng Bao¹  Baoyun Sun¹  Qinghe Wang¹ 

[1] School of Transportation Engineering, Shenyang Jianzhu University

关键词: self-anchored suspension bridge;    steel box girder;    shear lag effect;    finite element analysis;   

DOI  :  10.24425/ace.2021.137189

学科分类：建筑学

来源: Polska Akademia Nauk * Instytut Podstawowych Problemow Techniki / Polish Academy of Sciences, Institute of Fundamental Technological Research

【 摘 要 】

The shear lag effect of the steel box girder section in a self-anchored suspension bridge was investigated in this study. Finite element analysis software Midas Civil was used to discretize the girder under analysis into space plate elements and establish a plate element model. The law of shear lag in the longitudinal direction of the girder in the construction and completion stages was determined accordingly. The shear lag coefficient appears to change suddenly near the side support, middle support, side cable anchorage area, and near the bridge tower support of the steel box girder under the imposed load. The most severe shear lag effect is located near the side support and near the side cable anchorage area. Steel box girder sections are simulated before and after system conversion to analyze the shear lag coefficient in the bridge construction stage. The results show that the shear lag coefficient markedly differs before versus after system conversion due to the different stress mechanisms. The finite element analysis results were validated by comparison with the results of an analysis via analogous rod method.

【 授权许可】

Unknown