| 混凝土中氯离子时变扩散的边界元分析 |
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| 引用本文： | 杨绿峰,陈正,刘鸿亮,王燚. 混凝土中氯离子时变扩散的边界元分析[J]. 土木建筑与环境工程, 2011, 33(4): 73-79 |
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| 作者姓名： | 杨绿峰 陈正 刘鸿亮 王燚 |
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| 作者单位： | 广西大学 工程防灾与结构安全教育部重点实验室;土木建筑工程学院,南宁 530004;广西大学 工程防灾与结构安全教育部重点实验室;土木建筑工程学院,南宁 530004;广西大学 工程防灾与结构安全教育部重点实验室,南宁 530004;广西大学 工程防灾与结构安全教育部重点实验室,南宁 530004 |
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| 基金项目： | 国家自然科学基金（50768001）资助项目;广西科技计划课题（桂科能0992028-7）;广西自然科学基金重点项目（桂科自0991020Z;2011GXNSFB018013）;广西大学科研基金(XBZ100460)资助项目 |
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| 摘 要： | 氯离子在混凝土中的扩散是一个时变过程.考虑氯离子扩散系数的时间依赖性,将时变扩散系数引入混凝土的氯离子扩散模型中,通过变量代换,给出了时变扩散条件下氯离子扩散方程的基本解,并基于误差函数建立了氯离子扩散场补偿长度理论,分析了散场补偿长度系数的取值,在此基础上建立了时变扩散系数下混凝土中氯离子扩散分析的边界元法.通过算例...
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| 关 键 词： | 混凝土 氯离子 边界元 时变 扩散系数 |
| 收稿时间： | 2010-11-30 |
Boundary Element Method for Time-dependent Chloride Diffusion and the Chloride Distribution in Concrete |
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| YANG Liu-feng,CHEN Zheng,LIU Hong-liang and WANG Yi. Boundary Element Method for Time-dependent Chloride Diffusion and the Chloride Distribution in Concrete[J]. Journal of Civil,Architectrual & Environment Engineering, 2011, 33(4): 73-79 |
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| Authors: | YANG Liu-feng CHEN Zheng LIU Hong-liang WANG Yi |
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| Affiliation: | Key Laboratory of Disaster Prevention and Structural Safety,Ministry of Education;School of Civil Engineering and Architecture,Guangxi University,Nanning 530004,P.R.China;Key Laboratory of Disaster Prevention and Structural Safety,Ministry of Education;School of Civil Engineering and Architecture,Guangxi University,Nanning 530004,P.R.China;Key Laboratory of Disaster Prevention and Structural Safety,Ministry of Education,Guangxi University,Nanning 530004,P.R.China;Key Laboratory of Disaster Prevention and Structural Safety,Ministry of Education,Guangxi University,Nanning 530004,P.R.China |
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| Abstract: | The process of chloride diffusion in concrete is time-dependent.The boundary element method (BEM) with a time-dependent diffusion coefficient is presented for chloride diffusion in concrete based on the suitable transformation of variables.The fundamental solution of the partial differential equation for time-dependent chloride diffusion in concrete is developed,and the compensation length of the diffusion field is defined as well as the compensation coefficient.The scheme of BEM with a time-dependent diffusion coefficient is developed.Two examples are given to demonstrate the accuracy and efficiency of the presented method and the rationality and the importance of the compensation length for the method. |
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| Keywords: | concrete chloride boundary element method (BEM) time-dependent diffusion coefficient |
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