混凝土三维细观力学模型分析

Analysis of Concrete 3-D meso-mechanical Model

混凝土的级配及骨料含量对其宏观力学特性有直接影响,选择合适的骨料模型是进行混凝土细观力学数值模拟的前提,在已提出的三维随机凸多面体骨料模型的基础上选择合适的试件模型并进行有限元剖分,利用并行计算技术分别对湿筛混凝土试件三维球形骨料和凸多面体骨料细观模型进行了静载弯拉破坏数值模拟对比计算。计算结果表明,三维凸多面体骨料生成算法是可行的,能够满足混凝土三维细观力学模拟的需要。

The grade and aggregate content of concrete have a direct influence on its trait of macro- dynamics. A suitable model of the aggregate concrete with high aggregate content is a precondition to successfully execute concrete meso - mechanical simulation. Based on the algorithm and the 3 - D random convex polyhedron aggregate model, a parallel numerical computation of the wet - sieved concrete specimen was executed successfully to verify the model of random convex polyhedron aggregate.