| 氯离子环境下钢筋混凝土结构耐久性寿命评估 |
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| 引用本文： | 吴瑾,吴胜兴.氯离子环境下钢筋混凝土结构耐久性寿命评估[J].土木工程学报,2005,38(2):59-63. |
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| 作者姓名： | 吴瑾 吴胜兴 |
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| 作者单位： | 1. 南京航空航天大学土木工程系
2. 河海大学土木工程学院 |
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| 基金项目： | 国家自然科学基金项目 (50 0 790 0 2 ) |
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| 摘 要： | 混凝土结构耐久性寿命终结的标志应视工程对象和使用要求不同而有不同 ,提出了氯离子环境下混凝土结构耐久性寿命评估的方法。将混凝土表面氯离子浓度、保护层厚度作为随机变量 ,将扩散系数作为随机过程 ,建立了混凝土保护层中氯离子浓度分布的随机模型 ,推导出了氯离子浓度的均值 ,用于计算钢筋开始锈蚀时间。本文对某海港西大堤钢筋混凝土护栏的耐久性寿命进行了评估 ,采用实测数据的耐久性寿命评估结果与现场调查结果较为一致
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| 关 键 词： | 氯离子环境 耐久性寿命 评估 |
| 文章编号： | 1000-131X(2005)02-0059-05 |
| 修稿时间： | 2003年11月2日 |
DURABILTY ASSESSMENT FOR REINFORCED CONCRETE STRUCTURES IN CHLORIDE ENVIRONMENT |
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| Wu Jin,Wu Shengxing.DURABILTY ASSESSMENT FOR REINFORCED CONCRETE STRUCTURES IN CHLORIDE ENVIRONMENT[J].China Civil Engineering Journal,2005,38(2):59-63. |
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| Authors: | Wu Jin Wu Shengxing |
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| Affiliation: | Wu Jin~1 Wu Shengxing~2 |
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| Abstract: | Definition of the end of the durability life of R.C. structures is dependent on the type and function of the structures. The methodology for durability assessment R.C. structures in chloride environment is presented. A stochastic model of the chloride ion concentration in the concrete cover is established by treating the chloride ion concentration at the concrete surface and the thickness of the concrete cover as random variables, and the chloride diffusion coefficient as a stochastic process. The mean value of the chloride ion concentration in the concrete cover is derived. The model can be employed to determine the time when corrosion initiates.The durdaility of the R.C. balustrades of a harbor west dam is assessed,using routine inspection data,and the results show good agreement with that of field investigation. |
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| Keywords: | chloride environment durable life assessment |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
