高速公路加筋土体的滑移变形过程模拟

首先分析了加筋土颗粒接触面处的单元剪切刚度矩阵,并考虑土体剪切破坏的应力特点,引入莫尔库伦强度准则对加筋土体的微元强度进行度量,从而建立了模拟加筋土体滑移变形过程的统计损伤本构模型.在此基础上,进而提出一种较完备的,且参数少、物理意义明确的模型参数确定方法.最后,通过与常规直剪试验曲线的对比分析,发现该模型能够模拟加筋土体的滑移变形特性,并进而探讨了土体抗剪强度随法向应力的变化规律,从而验证了模型的合理性.

Simulation of the Slipping Deformation Process of Reinforced Soil in Expressways

Firstly,the shear element stiffness matrix of contact surface for reinforced soil-structure was analyzed,the failure characteristics of shear stress were considered,the Mohr-Coulomb strength criterion was considered to measure microcosmic element strength of reinforced soil,and a statistical damage constitutive model for the simulating process of reinforced soil slipping deformation was established.Secondly,on the basis of this,a comprehensive approach to determine model parameters was proposed,and this mod...