氯离子在混凝土中扩散传输的有限体积法模拟分析  

SIMULATION ANALYSIS OF CHLORIDE PENETRATION IN CONCRETE WITH FINITE VOLUME METHOD

作　　者：周新刚[1,2] 李克非[1] 陈肇元[1] 

机构地区：[1]清华大学土木工程系,北京100084 [2]烟台大学土木工程学院,山东烟台264005

出　　处：《工程力学》2013年第7期34-39,共6页Engineering Mechanics

基　　金：国家科技支撑计划计划课题-跨海集群工程混凝土结构120年使用寿命关键技术

摘　　要：基于氯离子在混凝土结构中的扩散传输理论,建立了氯离子扩散传输偏微分方程,讨论了边界与初始条件。根据因变量在有限大小的控制体积中满足守恒定理,建立了氯离子在混凝土中扩散传输的离散方程,编制了计算程序。算例分析表明,有限体积法可以很好地模拟氯离子在混凝土中的扩散传输,可以分析计算复杂边界条件下的混凝土内的氯离子分布,并对受氯离子侵蚀混凝土结构的使用寿命进行预测分析。Based on the diffusion transportation theory of chloride ion in concrete, the differential diffusion transportation equations have been proposed. The boundary and initial conditions of concrete members exposed to chloride ion environment are discussed. According to the mass conservation theorem in any finite control volumes of concrete, the differential equations of diffusion transportation can be derived as discrete equations. Matrix solution methods are designed for this Finite Volume Method （FVM）. Examples calculation shows that the FVM is a good numerical analysis method for diffusion transportation simulation in concrete. This method can be used to analyze the chloride ion profile in concrete with arbitrary boundary conditions, and to predict the service life of concrete structural members exposed to chloride ion environment.

关 键 词：结构工程 混凝土耐久性 氯离子侵蚀 扩散传输 有限体积法 氯离子分布 

分 类 号：TU528.33[建筑科学—建筑技术科学]