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首页> 外文期刊>Advances in Concrete Construction >Corrosion initiation time models in RC coastal structures based on reliability approach
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Corrosion initiation time models in RC coastal structures based on reliability approach

机译：基于可靠性方法的钢筋混凝土海岸结构腐蚀起始时间模型

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The present work proposes new engineering models for determining corrosion initiation time in concrete reinforcing steels in marine environment. The models are based on Fick's second law that is commonly used for chloride diffusion. The latter is based on deterministic analyses involving the most influencing parameters such as distance of the concrete structure from the seaside, depth of steel concrete cover, ambient temperature, relative humidity and the water-cement ratio. However, a realistic corrosion initiation time cannot be estimated because of the uncertainties associated to the different parameters of the models. Therefore a reliability approach using FORM/SORM method has been applied to develop the proposed engineering models integrating a limit state function and a reliability index beta. As a result, the corrosion initiation time is expressed by new exponential engineering models where the uncertainties are associated to the model parameters. The main emerging result is a realistic decision tool for corrosion planning inspection.
机译：本工作提出了用于确定海洋环境中混凝土钢筋腐蚀开始时间的新工程模型。这些模型基于通常用于氯化物扩散的菲克第二定律。后者基于确定性分析，涉及到影响最大的参数，例如混凝土结构与海边的距离，钢筋混凝土覆盖层的深度，环境温度，相对湿度和水灰比。但是，由于与模型的不同参数相关的不确定性，无法估计实际的腐蚀开始时间。因此，已采用使用FORM / SORM方法的可靠性方法来开发提出的集成极限状态函数和可靠性指标beta的工程模型。结果，腐蚀开始时间由新的指数工程模型表示，其中不确定性与模型参数相关。主要出现的结果是用于腐蚀计划检查的现实决策工具。

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