基于GTM法设计沥青混合料的旋转剪切过程中相互作用的力学损伤机理研究

Study on Mechanical Damage Mechanism of Interaction during Rotary Shear for Asphalt Mixture Design based on GTM method

运用离散元理论模拟了基于GTM法设计沥青混合料的旋转剪切过程中相互作用的力学损伤作用机理,得出了GTM沥青混合料在试模内旋转剪切过程中颗粒变形、旋转规律,孔隙率发展程度、剪切带形成、剪切破坏直至压缩的全过程,以及GTM沥青混合料颗粒沿剪切面的定向排列和运动变化规律。从细观角度揭示了混合料在旋转剪切过程中颗粒的力学作用机理,将为今后工程现场检测提供技术基础。

In this paper,adopting theory of discrete element,the mechanical damage mechanism of interaction during rotary shear for asphalt mixture design based on GTM method has been simulated,so,particle deformation,rotation rule,degree of porosity development,shear band formation,the entire process of shear failure until compression,as well as the alignment and movement variation law of GTMasphalt particles along the shear plane during the rotation shear process of GTMasphalt mixture within the test module have been obtained.The mechanical mechanism of the GTM asphalt mixture particles during rotation shear process has been obtained from the microscopic point of view,which could provide a technological basis of field testing for future works.