Analysis of dynamic response of high-railway tunnel under vibrating load induced by high-speed train

With the development of high-speed railway, more attentions have been paid gradually about the issue of vibrating of high-railway tunnel induced by high-speed train. Dynamic responses of railway tunnel under the vibrating load has been analyzed by finite element method through using the numerical simulation of vertical vibrating load induced by high-speed train with excitation function. The response result of the displacements, velocities and accelerations at the top of tunnel are studied under the train speed at 200km/h~350km/h, and some conclusions are also drawn. The effect for tunnel displacement induced by the train speed is least, and for tunnel velocity is higher, and for tunnel acceleration is the highest. Under the situation of the train speed increases 0.75 times, i.e. 200km/h~350km/h, the displacements, velocities and accelerations at the top of tunnel increase 1.25, 2.30 and 1.35 times respectively.