Analysis and experimental study on torsion and distortion of single box three-cell cantilever girder with corrugated steel webs

被引：0

作者：

Deng W. ^{[1
]}

Mao Z. ^{[1
]}

Liu D. ^{[2
,3
]}

Zhang J. ^{[1
]}

机构：

[1] College of Civil Engineering, Nanjing Tech University, Nanjing

[2] School of Civil and Transportation Engineering, Hohai University, Nanjing

[3] Jiangsu Transportation Research Institute Co., Ltd, Nanjing

来源：

Jianzhu Jiegou Xuebao/Journal of Building Structures | 2020年 / 41卷 / 02期

关键词：

Bridge engineering; Corrugated steel web; Distortion; Model test; Single box three-cell girder cantilever girder; Torsion;

D O I：

10.14006/j.jzjgxb.2017.0462

中图分类号：

学科分类号：

摘要：

To study the torsion and distortion performance of single box three-cell girder with corrugated steel webs in cantilever state, the differential equations of torsion and distortion for the girder were derived considering the corrugation effect of corrugated steel webs and based on the second theory of Umanskii and the theory of box girder. Then, the calculations of the warping normal stress and shear stress caused by constrained torsion and distortion were solved by employing the initial parameter method and the elastic foundation beam method respectively. The calculation formulae proposed in this paper were verified by a single box three-cell double cantilever girder with corrugated steel webs under partial loads and symmetrical loads. Finally, for the single box three-cell composite girder with corrugated steel webs under partial load, the effects of parameters such as height, width and thickness of corrugated steel webs on the warping stress were analyzed by the theoretical model. The results show that the torsion and distortion effects of the single box three-cell cantilever girder with corrugated steel webs can be accurately calculated by the theoretical formulas. The warping normal stress of the cantilever beam is mainly caused by the distortion deformation while the warping shear stress is mainly produced by the restrained torsion. The warping normal stress and shear stress caused by the torsion and distortion of the single box three-cell cantilever girder with corrugated steel webs cannot be ignored because the ratio of the warping stress to the bending stress of the cantilever beam is large. The height and width have a significant influence on the warping stress of single box three-cell composite girder with corrugated steel webs, and the thickness of corrugated steel webs has almost no effect. © 2020, Editorial Office of Journal of Building Structures. All right reserved.

引用

页码：173 / 181

页数：8

共 16 条

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