Determination method for truck axle weight limit based on structural damage state and reliability of RC girder bridges
Lang Liu,Manfei Xu,Yifei Zhao,Jingbo Liao,Min Duan
Abstract
Heavily loaded trucks have become an essential part of traffic flow, which causes significant threat to structural performance and even structural safety, under this circumstances, implementing truck weight limitation is of vital for guarantying bridge safety. This study aims to propose a framework for determining truck weight limitation, and mainly focuses on axle load limit. Firstly, one year of WIM data is utilized to analyze characteristics of trucks, then a non-parametric Bayesian network is constructed to synthesize spacing of axles based on observations available, to generate complete WIM database. Secondly, overloaded trucks are filtered and applied to the finite element model of a RC bridge to obtain bridge response, then, two damage states and four damage indices are defined according to material and structural performance. Finally, the probability density evolution method is adopted to perform reliability analysis, by constructing the relationship of axle load, damage indices and reliability index, axle load limitation is recommended. The proposed framework could provide reference to decision-makers responsible for traffic control.
Lang Liu, Manfei Xu, Yifei Zhao — School of Civil Engineering, Chongqing Jiaotong University, 66# Xuefu Avenue, Nan'an District, Chongqing 400074, China
Jingbo Liao, Min Duan — Wukang Company, China Merchants Chongqing Communications Technology Research and Design Institute Co., LTD, 33# Xuefu Avenue, Nan'an District, Chongqing 400067, China
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