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

作　　者：赵宁宁 冯吉利[2] ZHAO Ningning;FENG Jili(School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454003,China;School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]河南理工大学土木工程学院,河南焦作454003 [2]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《混凝土》2024年第8期67-71,94,共6页Concrete

基　　金：国家重点研发计划项目(2016YFC0600901);国家自然科学基金(41172116,U1261212)。

摘　　要：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.

关 键 词：细观结构 梁-粒子模型 骨料 混凝土 点阵法 

分 类 号：TU528.01[建筑科学—建筑技术科学]