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.

Details

Title
Development of Live Load Distribution Factor Equation for Concrete Multicell Box-Girder Bridges under Vehicle Loading
Author
Choi, Won 1 ; Mohseni, Iman 1 ; Park, Jongsup 2 ; Kang, Junsuk 3   VIAFID ORCID Logo 

1  Department of Landscape Architecture and Rural Systems Engineering, Seoul National University, Seoul, South Korea 
2  Department of Civil Engineering, Sangmyung University, Cheonan, South Korea 
3  Department of Landscape Architecture and Rural Systems Engineering, Seoul National University, Seoul, South Korea; Research Institute of Agriculture and Life Science, Seoul National University, Seoul, South Korea 
Pages
1-14
Publication year
2019
Publication date
Dec 2019
Publisher
Springer Nature B.V.
ISSN
19760485
e-ISSN
22341315
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1186/s40069-019-0336-1
ProQuest document ID
2190328589
Copyright
International Journal of Concrete Structures and Materials is a copyright of Springer, (2019). All Rights Reserved., © 2019. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.