作　　者： ; ; ;

机构地区： 广州大学土木工程学院

出　　处： 《混凝土》 2011年第3期9-10,16,共3页

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

领　　域： [建筑科学]