Probability calculation of rebars corrosion in reinforced concrete using css algorithms
来源期刊：中南大学学报(英文版)2015年第8期
论文作者：Mohsen-Ali Shayanfar Mohammad-Ali Barkhordari Mohammad Ghanooni-Bagha
文章页码：3141 - 3150
Key words：reinforced concrete; reliability index; chloride diffusion; carbonation; charged system search (CSS) optimization
Abstract: Reinforcement inside the concrete is protected from corrosion and its damages until several years after the construction. After corrosion initiation, the cross section of reinforcement begins to reduce and often load bearing of the reinforced concrete structure will be reduced significantly. Corrosion of reinforcements in concrete in polluted and contaminated areas can occur in two ways: chloride and carbonation. In this work, meta-heuristic approach of charged system search (CSS) is used to calculate corrosion occurrence probability due to chloride ions penetration. The model efficiency is verified by comparing the available examples in technical literature and results of Monte Carlo analysis. According to the analyses performed, using different probabilistic distributions regardless of probabilistic moments based on real distribution leads to diverse results. In addition, influence of each effective parameter in corrosion occurrence varies by changing other parameters.
Mohsen-Ali Shayanfar, Mohammad-Ali Barkhordari, Mohammad Ghanooni-Bagha
(The Centre of Excellence for Fundamental Studies in Structural Engineering,
Iran University of Science and Technology, P.O.BOX: 16765-163, Narmak, Tehran, Iran)
Abstract:Reinforcement inside the concrete is protected from corrosion and its damages until several years after the construction. After corrosion initiation, the cross section of reinforcement begins to reduce and often load bearing of the reinforced concrete structure will be reduced significantly. Corrosion of reinforcements in concrete in polluted and contaminated areas can occur in two ways: chloride and carbonation. In this work, meta-heuristic approach of charged system search (CSS) is used to calculate corrosion occurrence probability due to chloride ions penetration. The model efficiency is verified by comparing the available examples in technical literature and results of Monte Carlo analysis. According to the analyses performed, using different probabilistic distributions regardless of probabilistic moments based on real distribution leads to diverse results. In addition, influence of each effective parameter in corrosion occurrence varies by changing other parameters.
Key words:reinforced concrete; reliability index; chloride diffusion; carbonation; charged system search (CSS) optimization
