首页 | 本学科首页   官方微博 | 高级检索  
     检索      

海洋环境下混凝土中钢筋表面氯离子浓度的随机模型
引用本文:吴瑾,吴胜兴.海洋环境下混凝土中钢筋表面氯离子浓度的随机模型[J].河海大学学报(自然科学版),2004,32(1):38-41.
作者姓名:吴瑾  吴胜兴
作者单位:河海大学土木工程学院,江苏,南京,210098
基金项目:国家自然科学基金资助项目(50079002)
摘    要:分析了海洋环境下氯离子在混凝土中的传输机理及其随机扩散过程.将扩散系数作为随机数,混凝土表面氯离子浓度、保护层厚度作为随机变量,建立混凝土中钢筋表面氯离子浓度分布的随机模型,推导出钢筋表面氯离子浓度的均值和方差.算例结果表明,该模型的计算值较传统的Fick扩散定律更接近试验值,可用于预测海洋环境下混凝土中钢筋表面的氯离子浓度.

关 键 词:海洋环境  混凝土  钢筋  氯离子浓度  浓度扩散  随机模型
文章编号:1000-1980(2004)01-0038-04
修稿时间:2004/11/11 0:00:00

Stochastic model of chloride ion concentration at steel-concrete interface in marine environment
WU Jin,WU Sheng-xing.Stochastic model of chloride ion concentration at steel-concrete interface in marine environment[J].Journal of Hohai University (Natural Sciences ),2004,32(1):38-41.
Authors:WU Jin  WU Sheng-xing
Abstract:The transportation mechanics and stochastic diffusion of chloride ions in concrete in the marine environment are analyzed. A stochastic model of the chloride ion concentration at steel-concrete interfaces is established with the chloride ion concentration at concrete surfaces and the thickness of concrete covers taken as random variables, and the chloride ion diffusion coefficient as a stochastic process. The mean value and variance of the chloride ion concentration at steel-concrete interfaces are obtained. The chloride ion concentration derived by this stochastic model shows better correlation with experimental data than that derived by the conventional Fick's second law. So, the stochastic model can be used to predict the chloride ion concentration at the steel-concrete interface in the marine environment.
Keywords:marine environment  concrete  steel-concrete interface  chloride ion concentration  concentration diffusion  stochastic model
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《河海大学学报(自然科学版)》浏览原始摘要信息
点击此处可从《河海大学学报(自然科学版)》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号