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Published: Građevinar 77 (2025) 8
Paper type: Original scientific paper
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Vertical-bending properties of composite box girder with corrugated steel web and steel bottom slab

Feng Cen, Pei-wei Gao

Abstract

A composite box girder with corrugated steel webs and a steel bottom slab is a new type of steel–concrete structure that works primarily in the vertical-bending state. This study proposes a method to derive the governing differential equations and natural boundary conditions that define the additional deflection induced by the shear-lag effect as the generalised displacement. Two shear-lag longitudinal warping displacement difference functions were set for the cantilever and flange slabs of the box girder to accurately analyse its mechanical properties. The proposed equations are verified by experimental and numerical data. This equations reflect the vertical-bending mechanical properties of the composite box girder, including the non-uniform distribution of normal stress in the flange slabs and the influence of the accordion effect, shear lag, and self-equilibrium conditions.

Keywords
composite box girder, stress distribution, accordion effect, shear lag effect, self-equilibrium condition

HOW TO CITE THIS ARTICLE:

Cen, F., Gao, P.: Vertical-bending properties of composite box girder with corrugated steel web and steel bottom slab, GRAĐEVINAR, 77 (2025) 8, pp. 745-756, doi: https://doi.org/10.14256/JCE.4074.2024

OR:

Cen, F., Gao, P. (2025). Vertical-bending properties of composite box girder with corrugated steel web and steel bottom slab, GRAĐEVINAR, 77 (8), 745-756, doi: https://doi.org/10.14256/JCE.4074.2024

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This paper is licensed under a Creative Commons Attribution 4.0 International License.
Authors:
4074 A1 WEB
Feng Cen
Nanjing University of Aeronautics and Astronautics, China
Department of Civil Engineering
4074 A2 WEB
Pei-wei Gao
Nanjing University of Aeronautics and Astronautics, China
Department of Civil Engineering