Reliability Analysis of Long‑Span Concrete Box Arch Bridge under Temperature Effect Combinations

ZHENG Junlin, School of Civil Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , China ;China Harbour Engineering Co ., Ltd., Beijing 100027 , ChinaFollow
JIANG Youbao, School of Civil Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , ChinaFollow
ZHENG Xinhao, School of Civil Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , China
LU Naiwei, School of Civil Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , China

Abstract

The existing design methods for concrete arch bridge structures do not consider the random characteristics of the eccentricity generated by load effects and overlook the influence of stochastic eccentricity on structural reliability.To address this deficiency,a calculation model for eccentricity under temperature effect combinations was derived.The random characteristics of eccentricity for different sections of the main arch of concrete arch bridges and their sectional bearing capacities were analyzed under different load parameter combinations.By utilizing the Monte Carlo method,reliability indices were computed for different sections of the main arch and different load parameter combinations after considering the random characteristics of eccentricity.The results indicate that considering the random characteristics of eccentricity leads to significant variability in the eccentricity of main arch sections,and the sectional bearing capacity may be governed by tensile strength.Reliability indices vary greatly with changes in the temperature-to-load effect ratio,suggesting that when the temperature-to-load effect ratio is significant,existing designs based on fixed eccentricity may lead to potentially unsafe designs.

Publication Date

2-22-2025

DOI

10.14048/j.issn.1671-2579.2025.01.019

First Page

159

Last Page

165

Submission Date

March 2025

Recommended Citation

Junlin, ZHENG; Youbao, JIANG; Xinhao, ZHENG; and Naiwei, LU (2025) "Reliability Analysis of Long‑Span Concrete Box Arch Bridge under Temperature Effect Combinations," Journal of China & Foreign Highway: Vol. 45: Iss. 1, Article 19.
DOI: 10.14048/j.issn.1671-2579.2025.01.019
Available at: https://zwgl1980.csust.edu.cn/journal/vol45/iss1/19

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