The Research On The Vibration Responses Of Continuous Beam Bridge Under Combined Seismic Loads And Moving Vehicle Loads

This paper mainly studies the response of continuous beam bridge under combined seismic load and moving vehicle load. The Sixianjiao bridge of Gui-Guang Railway is taken as the example for simulation. The finite element model is created by using the finite element software ANSYS. In this paper, the dynamic responses of internal forces and displacement of the bridge under three combined loads, it also provides accurate and valuable data on safety indicators.The main contents include the followings.1.This paper takes the continuous beam of Sixianjiao bridge of Gui-Guang Railway as the example. By using the finite element software ANSYS, the finite element model is created, and the dynamic responses of the model undergoing moving load is gotten.The influencing factors includes train speed and train load.2.Considing the different seismic load combination, the paper carries out a series of numerical simulations by using the finite element model of the continuous beam of Sixianjiao bridge of Gui-Guang Railway, what is more, the effect of the pier’s height on the dynamic responses is also discussed.3.Based on the former studies, derailment coefficient and lateral force are introduced as safety indicators when train is runing. In order to carry out a comprehensive and systematic study of the dynamic response of continuous beam bridge, eight different working conditions based on the difference of train’s velocities and seismic loads are simulated. By using the transient analysis module providing by ANSYS software, the eight different working conditions results of which are studied in order to evaluate the safety of the trains which is running on the rail are simulated.