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Development of Live Load Distribution Factor Equation for Concrete Multicell Box-Girder Bridges under Vehicle Loading

Cited 3 time in Web of Science Cited 3 time in Scopus
Authors
Choi, Won; Mohseni, Iman; Park, Jongsup; Kang, Junsuk
Issue Date
2019-03-13
Publisher
Springer Open
Citation
International Journal of Concrete Structures and Materials. 2019 Mar 13;13(1):22
Keywords
fnite element modellingdistribution factortruckbox bridges
Abstract
The evaluation and design of concrete bridges in large part depend on the transverse distribution characteristics of the live load carried and the service level. The live load distribution for continuous concrete multicell box-girder bridges varies according to bridge configuration, so when designing such bridges, it is important to determine the maximum negative stress at the piers, the midspan positive (tensile) stress and the deflection of the bridge when subjected to live loads. This paper reports an extensive parametric study to determine the maximum stress, deflection, and moment distribution factors for two span multicell box-girder bridges based on a finite element analysis of 120 representative numerical model bridges. Bridge parameters were selected to extend the parameters and ranges of current live load distribution factors defined by AASHTO LRFD specifications. The results indicate that the span length, number of boxes, and the number of lanes all significantly affect the positive (tensile) and the negative (compression) stress distribution factors. A set of equations proposed to describe the behavior of such bridges under AASHTO LRFD live loads yielded results that agreed closely with the numerically derived results for the stress and deflection distribution factors.
ISSN
2234-1315
Language
English
URI
https://hdl.handle.net/10371/147199
DOI
https://doi.org/10.1186/s40069-019-0336-1
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College of Agriculture and Life Sciences (농업생명과학대학)Research Institute of Agriculture and Life Sciences (농업생명과학연구원)Journal Papers (저널논문_농업생명과학연구원)
Graduate School of Environmental Studies (환경대학원)Dept. of Landscape Architecture (환경조경학과)Journal Papers (저널논문_환경조경학과)
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