硫酸盐侵蚀混凝土过程的有限元格式  

Finite element format of the sulfate eroding process in concrete

作　　者：魏晓峰[1] 焦楚杰[1] 高乐[1] 

机构地区：[1]广州大学土木工程学院,广东广州510006

出　　处：《混凝土》2011年第3期9-10,16,共3页Concrete

基　　金：国家自然科学基金项目(50708022);广东省自然科学基金项目(06301038);建设部科研开发项目(06-K1-37;07-K4-5;10-K3-27/10-K4-18);广州市属高校科技计划项目(62064);广州大学科研创新团队项目

摘　　要：混凝土硫酸盐侵蚀可视为一个瞬态过程,可采用多维瞬态扩散模型来模拟。为模拟硫酸盐侵蚀的过程,建立合适的SO42-扩散有限元格式至关重要。假设混凝土内部各点硫酸盐的浓度为空间域和时间域的函数,采用加权余量法和部分离散法,推导出瞬态浓度场的硫酸盐扩散微分方程,建立了三维瞬态有限元格式,为侵蚀过程的数值模拟奠定了较好的基础。The sulfate eroding process can be regarded as a transient process, and can be simulated by the multidimension and transient-diffusion model.Establishing an appropriate finite element format of SO4^2- diffusion is very crucial to simulate the eroding process.A hypothesis is made in this paper that the concentration of each point in concrete is a function concerning spatial domain and time domain.The weighted-residual and part-discrete method are used,and the sulfate diffusion differential equation was obtained,and the 3-D transient finite element format was built, which may be useful for the numerical simulation of the eroding process.

关 键 词：混凝土 瞬态 硫酸盐侵蚀 有限元格式 

分 类 号：TU528.01[建筑科学—建筑技术科学]