基于PFC的路用混凝土三轴力学细观参数影响研究  

Research on the Influence of Triaxial Mechanical Microscopic Parameters of Road Concrete Based on PFC

作　　者：赵龙 ZHAO Long(Changsha Kexin Highway Engineering Testing and Inspection Co.,Ltd.,Changsha 410208,Hunan,China)

机构地区：[1]长沙科信公路工程试验检测有限公司,湖南长沙410208

出　　处：《工程技术研究》2023年第11期117-119,共3页Engineering and Technological Research

摘　　要：为研究雄黄高速公路混凝土材料宏观力学水平,文章采用PFC颗粒流离散元仿真计算方法,探讨了不同细观参数下模型试样应力、应变特征。研究表明,有效模量细观参数不会影响试样应力应变走向趋势,而刚度比对此会有影响;有效模量、刚度比细观参数与试样承载应力均为正相关关系,且刚度比0.8后试样承载应力增幅减小;围压效应可促进有效模量对承载应力的增强作用,但刚度比受围压效应影响与前者相反。In order to study the macroscopic mechanical level of concrete materials in Xionghuang Expressway,the PFC particle flow discrete element simulation method is used to discuss the stress and strain characteristics of model samples under different microscopic parameters.The results show that the microscopic parameters of effective modulus will not affect the trend of stress and strain of the sample,while the stiffness ratio will affect it.The microscopic parameters of the effective modulus and stiffness ratio are positively correlated with the bearing stress of the sample,and the increase in the bearing stress of the sample decreases after the stiffness ratio reaching 0.8.The confining pressure effect can promote the enhancement of the effective modulus to the bearing stress,but the influence on stiffness ratio by the confining pressure effect is opposite to the former.

关 键 词：PFC 混凝土 三轴力学 细观参数 

分 类 号：TV431[水利工程—水工结构工程]