基于细观层次混凝土骨料模型生成方法研究分析

An Analytical Survey on Generation Methods of Meso-level Aggregate Models for Concrete

混凝土细观数值模拟分析成为了一种有前景替代大量宏观试验的方式,但目前数值模拟中缺少成熟的细观力学模型。重点介绍了混凝土的3种细观力学模型,即随机骨料模型、数字图像模型和参数等效化单元模型,详细说明这3种细观骨料模型的生成特点、关键问题和研究成果,对比分析3种细观模型的生成效率、网格化分、计算效率和精确度等,并提出了在这方面有待进一步研究的问题。

The meso-level numerical simulation and analysis of concrete is becoming apromising way to replace the large amount of macroscopic experiments.However,there is no enough experienced mechanical model of mesolevel in numerical simulation.This paper mainly introduces three kinds of meso-level models of concrete which are random aggregate model,digital image model and parameter equivalent unit model.The generation characteristics,the key difficulties and the research results have been illustrated in detail.Further problems are put forward in order to make progresses after the contrastive analysis of the characteristics of generating efficiency,the grid dividing,the calculating efficiency and accuracy of the three models.