细观骨料模拟在混凝土路面中的应用

Application of Meso-Aggregate Simulation in Concrete Pavement

混凝土细观模型相对于宏观模型更能准确地反映出混凝土路面的力学性能。本文利用蒙特卡罗随机抽样原理生成不规则混凝土骨料的模型,将生成的骨料模型充填于混凝土中,建立三维三相混凝土细观骨料模型;运用LS-DYNA软件对细观混凝土骨料进行低速冲击仿真模拟,探究混凝土路面受冲击载荷作用下的破坏方式及裂纹扩展情况。

Compared with the macroscopic model,the concrete mesoscopic model can more accurately reflect the mechanical properties of the concrete pavement.In this paper,the Monte Carlo random sampling principle is used to generate irregular concrete aggregate models,and the generated aggregate models are filled in concrete to establish a three-dimensional three-phase concrete meso-aggregate model;the LS-DYNA software is used to simulate the lowspeed impact of the meso-level concrete aggregate,so as to explore the failure mode and crack growth of the concrete pavement under the impact load.