混凝土细观结构的数值模拟研究  

Research on Numerical Simulation of Meso-structure of Concrete

作　　者：宋来忠[1] 廖大乾[1] Song Laizhong;Liao Daqian(College of Science,China Three Gorges Univ.,Yichang 443002,China)

机构地区：[1]三峡大学理学院,湖北宜昌443002

出　　处：《三峡大学学报（自然科学版）》2018年第6期56-60,共5页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金面上项目(11171181)

摘　　要：在细观层次上,混凝土作为具有增强颗粒的复合材料,可以视作大量形状不规则的增强颗粒及其孔洞随机分布的区域.首先,把增强颗粒及其孔洞假设成一类"星形颗粒",利用椭球的参数方程,采用参数曲面的自由变形技术,给出这类星形颗粒的参数方程.然后,基于星形的参数方程,给出了空间中任意点与星形颗粒位置关系的判断方法,并以此给出了大量形星形随机分布的区域的创建方法.数值实验表明:可以生成颗粒含量达到55%的二级配混凝土模拟试件,60%的三级配混凝土模拟试件,为对混凝土等复合材料进行细观热学、力学研究,提供了创建几何模型的方法.At the meso level,concrete as a composite material with reinforced particles can be regarded as a large number of irregularly shaped reinforcing particles/holes randomly distributed regions.First of all,assuming that the enhancement particles/holes are a kind of star-shaped particles;the parametric equation of the ellipsoid is used,and the parametric surface free deformation technology is used to give the parametric equations of such star-shaped particles.And then,based on the parametric equation of the star,the method for judging the relationship between any point in the space and the position of the star is given;and a method for creating a large number of randomly distributed regions in the shape of a star is given.Numerical experiments show that it is possible to generate secondary concrete simulation specimens with a particle content of 55% and 60% tertiary concrete simulation tests,respectively,to provide meso-thermal and mechanical studies of concrete and other composite materials,and to provide geometric models methods.

关 键 词：数值模拟 随机分布 星形 混凝土 

分 类 号：TU43[建筑科学—岩土工程]