Mesomechanics Numerical Simulation of High-Speed Railway Tunnel Under the Action of Aerodynamic Effect

Based on the study of pressure change law on tunnel lining,a concrete mesomechanics model with its own pore space is presented.The mechanical properties of the concrete are simulated in middle cross section of the tunnel lining vault during the process of high-speed train running in the tunnel.The stress diagram along the x axis and the first principal stress diagram are obtained at different time spans.The result indicates that the aerodynamic effect of the high-speed railway tunnel has an important influence on the mesomechanics properties and durability of the high-speed railway tunnel lining.