水利水电技术2018，Vol.49Issue(4)：179-187,9.DOI:10.13928/j.cnki.wrahe.2018.04.025
基于三维细观结构轻骨料混凝土力学性能的数值模拟
3-D mesostructure-based numerical simulation of mechanical properties of lightweight aggregate concrete
摘要
Abstract
In order to study the failure mechanism of lightweight aggregate concrete from the aspect of mesostructure,a new type of meshing technique is proposed herein with SCDM software,and then a finite element model for 3-D mesostructural lightweight aggregate concrete is established.The failure process of the axial compressive and splitting tensile experiments are simulated and compared with those of the experimental results.The calculation result shows that the errors of both the calculated value and experiment value of the axial compressive and splitting tensile strengths are within 3.5％.During the process of the axial compressive experiment,the earliest crack occurs at the location of lightweight aggregate,which indicates that the lightweight aggregate is the weak link of the lightweight aggregate concrete.Following with the further increase of load,a conical interface with two opposite vertexes is finally formed.During the simulation of splitting tensile experiment,the earliest crack occurs at the location of lightweight aggregate too,which finally forms a wide and large major crack along with the increase of load and is perpendicular to the principal tensile stress.The comparative analysis of the experiment results shows that the simulation method proposed herein can better simulate the static mechanical properties of lightweight aggregate concrete.关键词
轻骨料混凝土/细观模型/数值模拟/轴心抗压/劈裂抗拉Key words
lightweight aggregate concrete/mesoscopic model/numerical simulation/axial compressive strength/split tensile strength分类
建筑与水利引用本文复制引用
李革,徐泽华,牛建刚..基于三维细观结构轻骨料混凝土力学性能的数值模拟[J].水利水电技术,2018,49(4):179-187,9.基金项目
国家自然科学基金项目(51368042) （51368042）
