基于BPMS的砂浆和混凝土细观模型研究

Investigation on mesoscopic model of mortar and concrete based on beam particle model solver

混凝土是由砂浆和骨料构成的非均质材料。在细观层面上评估混凝土的断裂过程有助于阐明混凝土的材料特性。采用C++编制的梁-粒子模型求解器(Beam Particle Model Solver,简称BPMS)对砂浆和混凝土进行二维数值分析。为了模拟混凝土的断裂,采用点阵法高效快速地建立细观尺度的颗粒模型。数值研究较好地呈现了砂浆和混凝土在单轴压缩条件下的破坏行为以及混凝土三点弯在冲击条件下的断裂过程,从而证实了BPMS的强健性及稳定性。

Concrete is a heterogeneous material composed of mortar and aggregate.Evaluating the fracture process of concrete at the mesolevel is helpful to clarify the material properties of concrete.The beam-particle model solver(BPMS)compiled by C++is used to conduct two-dimensional numerical analysis of mortar and concrete.In order to simulate the fracture of concrete,the dot matrix method is used to establish the mesoscale particle model efficiently and quickly.The numerical study shows the failure behavior of mortar and concrete under uniaxial compression and the fracture process of concrete under three-point bending under impact conditions,which confirms the robustness and stability of BPMS.