粒径计算方法对细观混凝土数值建模的影响  

Influence of Particle Size Calculation Method on Numerical Modeling of Meso-concrete

作　　者：朱天宇 陈忠辉[1] 张令非 年庚乾 ZHU Tianyu;CHEN Zhonghui;ZHANG Lingfei;NIAN Gengqian(School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《建筑材料学报》2024年第2期106-113,145,共9页Journal of Building Materials

基　　金：国家自然科学基金资助项目(52074292);“十三五”国家重点研发计划项目(2017YFC1503103)。

摘　　要：采用最小包围盒(MBB)法确定骨料粒径,并与采用等体积球(EVS)法计算的骨料粒径进行比较,分析了这2种粒径计算方法对细观混凝土内部结构的影响.结果表明:采用MBB法计算的骨料粒径与室内试验采用筛分法确定的骨料粒径更为接近;与MBB法相比,EVS法低估了球状、片状和盘状骨料的粒径,且被低估的骨料占比由大到小依次为球状、片状和盘状,EVS法高估了棒状骨料的粒径;粒径计算方法对细观混凝土内部结构的影响因骨料形状类型不同而呈现一定差异性.Aggregate particle size was measured by the minimum bounding box(MBB)method and compared with that calculated by the equal volume sphere(EVS)method.The results of these two methods on the internal structure of meso-concrete were analyzed.The results show that the aggregate particle size calculated by MBB method is close to that measured by sieving method in the laboratory test.Compared with the MBB method,the EVS method tends to underestimate the particle sizes of spherical,blade and disc types of aggregates,and the percentage of underestimated aggregates is in descending order as spherical,blade and disc types while that of the particles of rode type was overestimated.The influence of the particle size calculation method on the internal structure of meso-concrete shows some differences with respect to the type of aggregate shape.

关 键 词：混凝土 粒径计算方法 细观结构 形状类型 骨料粒径 

分 类 号：TU528.01[建筑科学—建筑技术科学]