| 海洋环境下基于可靠度的混凝土结构耐久性评估 |
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| 引用本文： | 孙晓珍,邵旭东,晏班夫.海洋环境下基于可靠度的混凝土结构耐久性评估[J].公路,2007(3):141-146. |
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| 作者姓名： | 孙晓珍 邵旭东 晏班夫 |
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| 作者单位： | 湖南大学桥梁工程研究所,长沙市,410082 |
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| 摘 要： | 钢筋锈蚀是造成混凝土结构耐久性失效的最主要原因,海洋环境下导致混凝土结构中钢筋锈蚀的主要因素是C l-侵蚀。本文考虑氯离子的渗透随机过程,建立了海洋环境下结构抗力的随机模型;以桥梁服役状态下,钢筋锈蚀导致结构性能劣化为出发点,运用可靠度分析方法,对海洋环境下钢筋混凝土结构不同时期计入耐久性的承载力进行了分析,并用于某跨海大桥墩柱的耐久性评估。
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| 关 键 词： | 耐久性评估 时变可靠度 可靠度指标 氯离子扩散 |
| 文章编号： | 0451-0712（2007）03-0141-06 |
| 修稿时间： | 2006-09-16 |
Reliability-Based Durability Assessment of Reinforced Concrete Structure in Marine Environment |
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| SUN Xiao-zhen,SHAO Xu-dong,YAN Ban-fu.Reliability-Based Durability Assessment of Reinforced Concrete Structure in Marine Environment[J].Highway,2007(3):141-146. |
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| Authors: | SUN Xiao-zhen SHAO Xu-dong YAN Ban-fu |
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| Institution: | Institute of Bridge Engineering, Hunan University, Changsha 410082, China |
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| Abstract: | The chloride-induced corrosion of steel reinforcement is one of the significant causes of deterioration of reinforced concrete structures.A stochastic model considering the random process of chloride diffusion is proposed to determine the resistance of structure in marine environment.The time-dependent reliability analysis considering the structural durability is then employed to investigate the load-carrying capability of reinforced concrete structures.The effectiveness of this method is finally illustrated on the performance evaluation of the piers of an in-service sea-crossing bridge. |
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| Keywords: | durability assessment time-dependent reliability reliability index chloride diffusion |
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