Time-Dependent Safety Performance Assessment of Highway Bridges Considering Mechanical Behavior of Corroded Steel Reinforcement Subject to Carbonation-Induced Corrosion

Abstract:

A structural probabilistic resistance model was developed taking mechanical behavior of corroded reinforcing bars obtained from rapid corrosion specimens and real bridges and bonding performance between concrete and steels into accounts in this paper. Probabilistic model was used to capture randomness and variabilities of materials, geometrical size, corrosive process and corrosion ingredients. A time-dependent reliability model was used to predict probability of structural flexural failure incorporating existing dead load and live load model. It is found form results that probability of flexural failure for corrosive condition of highway bridges is about 18% higher than that predicted for no deterioration condition over next 100 years. It is from results indicated that an improvement in concrete durability specification such as increasing concrete cover and concrete strength can ameliorate the time dependent safety performance of highway bridges.

• Periodical: Applied Mechanics and Materials (Volumes 256-259)
• Pages: 1515-1519
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.256-259.1515
• Online since: December 2012
• Authors: Jian Xin Peng, Jian Ren Zhang
• Keywords: Carbonation-Induced Corrosion, Degradation, Highway Bridge, Reliability, Safety

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