不同孔隙特征混凝土的单轴压缩力学性能仿真研究  

Simulation Study on Uniaxial Compression Mechanical Properties of Concrete with Different Pore Characteristics

作　　者：刘双缘 李良松 张小洁[1,2] LIU Shuangyuan;LI Liangsong;ZHANG Xiaojie(Hubei Key Laboratory of Disaster Prevention and Mitigation,China Three Gorges University,Yichang Hubei 443002,China;College of Civil Engineering and Architecture,China Three Gorges University,Yichang Hubei 443002,China;Ganxi Vocational College of Science and Technology,Xinyu,Jiangxi 338000;Sponge City Research Institute of Pingxiang University,Pingxiang Jiangxi 337000,China)

机构地区：[1]防灾减灾湖北省重点实验室(三峡大学) [2]三峡大学土木与建筑学院,湖北宜昌443002 [3]赣西科技职业学院,江西新余338000 [4]萍乡学院海绵城市研究院,江西萍乡337000

出　　处：《萍乡学院学报》2024年第6期5-10,共6页Journal of Pingxiang University

基　　金：江西省科技计划项目“萍乡海绵城市雨洪调蓄与水处理系统研究”(PY2023001)。

摘　　要：课题组采用蒙特卡罗方法生成了混凝土随机细观骨料模型,基于ABAQUS二次开发平台,运用Python语言生成混凝土不同组成部分的有限元几何模型,并赋予不同的力学参数,构建含孔隙水的饱和混凝土细观模型,研究不同孔隙率、孔隙扁平度和应变速率对饱和混凝土力学特性的影响。研究表明:饱和混凝土的抗压强度与弹性模量均随着孔隙率的增大而减小;随着孔隙扁平度的增大而增大;随着应变速率的增大而增大;饱和混凝土的抗压强度和弹性模量的动态因子与应变速率的对数呈线性关系。The research group adopted the Monte Carlo method to generate a random meso-scale aggregate model of concrete.Based on the secondary development platform of ABAQUS,the finite element geometric models of different components of concrete were generated through the Python language,and different mechanical parameters were assigned to construct a meso-scale saturated concrete model containing pore water.The influences of porosity,pore flatness and strain rate on the mechanical properties of saturated concrete were studied.The research results show that both the compressive strength and elastic modulus of saturated concrete decrease with the increase of porosity,increase with the increase of pore flatness,and increase with the increase of strain rate.The dynamic factors of the compressive strength and elastic modulus of saturated concrete have a linear relationship with the logarithm of the strain rate.

关 键 词：混凝土 孔隙率 孔隙扁平度 应变速率 

分 类 号：TU528[建筑科学—建筑技术科学]