混凝土细观模拟的不同建模技术影响分析

Analysis of Impact of Different Modeling Techniques on Concrete Mesoscopic Simulation

建立了圆形、正多边形、随机多边形3种不同形状骨料的150mm×150mm随机骨料模型,且将随机多边形骨料模型单元等效均质化后得到细观单元等效化模型,进行4种不同随机模型的影响分析.结果表明:随机多边形骨料模型的计算精度最高,正多边形骨料模型次之,且4种模型与试验结果的误差均在7%以内;随机骨料模型中,细观单元等效化模型运算效率较高,且能保证一定的计算精度.

A 150mm×150mm random aggregate model with three different shapes aggregates of circular,regular polygon and random polygon is established;and the micro-unit equivalent model is established by the equivalent homogenization of random polygon aggregate model unit;and then the influences of four different stochastic models are analyzed.The results show that the accuracy of the random polygon aggregate model is the highest;the regular polygon aggregate model followed;and the errors of the four models with the experimental results are within 7%;in the random aggregate models,the micro-unit equivalent model has higher computational efficiency,so as to ensure the certain degree of accuracy.