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Mathematical Problems in Engineering
Volume 2018 (2018), Article ID 7613231, 13 pages
https://doi.org/10.1155/2018/7613231
Research Article

Warping Torsional and Distortional Stress of Composited Box Girder with Corrugated Steel Webs

1School of Civil Engineering, Chang’an University, Xi’an 710061, China
2Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing 400045, China
3School of Civil Engineering, Chongqing University, Chongqing 400045, China

Correspondence should be addressed to Peng Qiao; nc.ude.dhc@gnepoaiq

Received 25 October 2017; Revised 24 January 2018; Accepted 20 February 2018; Published 1 April 2018

Academic Editor: Roman Wendner

Copyright © 2018 Peng Qiao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The torsional behaviors of composite box girders with corrugated steel webs are more obvious than traditional concrete girders due to the lower torsional rigidity. In this paper, the torsion and distortion of this kind of composite girder are studied. The formulas for warping normal stress and shear stress were put forward according to the second theory of Umanskii, considering the accordion effect of corrugated steel webs. Then, the influences of different dimensional parameters on the torsional and distortional stress are investigated. Results show that the effect of parameters on stress is different and implicit in composite box girders with corrugated steel webs. Under eccentric loads, the warping torsional and distortional stress in this kind of girder should not be neglected. Compared with girders under corresponding symmetric loads, the total warping stress may be as big as flexural normal stress, and the total shear stress usually reaches 30 to 50 percentage of flexural shear stress. So the warping stress and additional shear stress due to warping torsion and distortion are suggested to be calculated by the proposed equations in structural analysis, which are usually not taken into account in conventional concrete box girders.