Study on spatial mechanical behavior of curved composite box girder with corrugated steel webs

被引：0
|
作者：
Xu L. [1 ]
Guo T. [1 ]
Zhang Y. [1 ]
Fan J. [2 ]
Yang Y. [1 ]
Wu W. [3 ]
Wang L. [3 ]
机构：
[1] School of Transportation Science and Engineering, Beihang University, Beijing
[2] Department of Civil Engineering, Tsinghua University, Beijing
[3] Gansu Province Transportation Planning, Survey & Design Institute Co., Ltd, Lanzhou
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2023年 / 44卷
关键词：
corrugated steel web; curved composite bridge; load transverse distribution factor; multi-box girder; static test;
D O I：
10.14006/j.jzjgxb.2023.S1.0019
中图分类号：
学科分类号：
摘要：
The composite box girder with corrugated steel webs and steel bottom plates has the advantages of high bearing capacity, good crack resistance, light self-weight, and convenient construction, and thereby has a promising potential for application in curved bridges. The static tests were conducted on the spatial mechanical behavior of curved composite double-box girders with corrugated steel webs. The key mechanical behavior including the bending stiffness, strain distribution, and support reaction force under elastic conditions were investigated. The results indicate that the outer arc side loading leads to a more obvious torsion effect. The normal strain distribution of the mid-span section conforms to the quasi-flat section assumption. Bearing disengagement may occur when the outer arc side is loaded. Based on experimental research, an elaborate finite element model for curved composite multi-box girder bridges with corrugated steel webs was established. The practical formula for calculating the load transverse distribution factor was derived by parametric analysis. The comparison with the numerical analysis results shows that the proposed empirical formula has high calculation accuracy, and the calculation error of more than 95% of the bridges is less than 10% . Compared with the AASHTO LRFD specification, the proposed formula can more accurately reflect the spatial mechanical characteristics of large curvature bridges, which can provide a reference for the simplified analysis and engineering design of such bridges. © 2023 Science Press. All rights reserved.
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页码：165 / 173
页数：8
相关论文
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