计算力学学报2016，Vol.33Issue(6)：924-931,8.DOI:10.7511/jslx201606019
基于降阶均匀化理论的混凝土双尺度力学性能分析
Two scale study on mechanical properties of concrete based on the reduced order homogenization theory
摘要
Abstract
Mesoscale characteristics of concrete have considerable influence on its macroscale mechanical properties .In this paper ,a random aggregate model ,which followed the probability distribution of real structure ,was established and used in FEM analysis to investigate relationship between the mesoscale characteristics and macroscale mechanical properties .Concrete was considered as a composite composed of aggregate ,mortar and the ITZ (Interfacial Transition Zone ) phase for simplification .Algorithms for generating ,distributing and meshing of random convex polyhedrons were programmed .Reduced order homogenization theory was proposed to reduce the calculation capacity with the mesoscale model ,by which the mesoscale model of concrete was preprocessed and a two‐scale algorithm was constructed . Uniaxial static compression simulations of concretes with different strengths were conducted with the two‐scale algorithm .It was shown that the two‐scale simulation results agreed well with both the experimental results and the mesoscale simulation results .The reduced order homogenization theory was proved to possess both high efficiency and high accuracy in multiple scale analysis of concrete .关键词
混凝土/降阶均匀化理论/随机骨料模型/细观力学/双尺度方法/静态压缩Key words
concrete/reduced order homogenization theory/random aggregate model/mesoscale mecha-nics/two-scale method/static compress分类
建筑与水利引用本文复制引用
陈东东,张先锋,郭磊,邓佳杰,高飞,何勇..基于降阶均匀化理论的混凝土双尺度力学性能分析[J].计算力学学报,2016,33(6):924-931,8.基金项目
爆炸冲击防灾减灾国家重点实验室（解放军理工大学）开放基金（DPMEIKF201405）资助项目． （）
