碾压混凝土细观结构力学性能的数值模拟

Numerical simulation of meso-level mechanical properties of roller compacted concrete

本文在细观层次上将碾压混凝土看成是由硬化水泥粉煤灰砂浆体、粗骨料颗粒及二者间的粘结带构成的两相非均质复合材料 ,以随机骨料模型代表碾压混凝土的细观结构 ,采用有限元技术模拟了劈拉试件的开裂过程 ,所得碾压混凝土的劈拉强度与试验结果基本吻合 .为碾压混凝土破坏机理的研究、碾压混凝土力学性能的数值模拟提供了新的技术途径 .

The RCC is taken as a two\|phae composite material consisting of mortar matrix (including cement and fly ash),aggregate and bonds between matrix and aggregate on meso\|level.This random aggregate model is used to simulate the structure of RCC.The propagation process of cracks and the mechanical properties of RCC in split specimens are simulated using FEM.The simulation result agrees well with the experimental data.