铁路隧道地震动力响应数值分析

摘要

Based on a railway tunnel engineering example, the cross-section was simulated with two-dimensional plane strain model by using the finite element software. The viscoelastic dynamic artificial boundary was used in the model. The horizontal and vertical seismic wave acceleration vibration was introduced. The stability of the tunnel and dynamic stress, displacement and strain changing rule under the condition of the earthquake was analyzed with the method of numerical simulation.%基于某铁路隧道工程实例,运用有限元软件对其横断面采用二维平面应变模型进行模拟,模型采用粘弹性动力人工边界,引入水平和竖直地震波加速度激振,以数值模拟的方法分析了地震工况下隧道的稳定性及动应力、位移、应变变化规律.