Dynamic Analysis For Bridge-vehicle Interaction Of Urban Wide Bridges Based On Three Dimensional Roadway Roughness

With the rapid development of urbanization, urban scale unceasingly expands, the traffic flow increases continually. In order to relieve urban traffic pressure, in addition to improve the city's construction plan, expanding of the road road width has become necessary. Therefore, the width vesus lenghth ratio of wide bridge could be greater than 1. So, the urban bridge's structure form, design and construction techniques have its own characteristics, in order to guarantee bridge safety and unimpeded, so the dynamic analysis, especially the bridge-vehicle coupling vibration analysis is very necessary. Therefore, this paper mainly work is as follows:First of all, for considering bridge deck width of the bridge-vehicle coupling vibration, through improving harmonic superposition method, will improving 2d pavement spectrum extended to 3d space, and combined with MATLAB programming realize 3d simulation modeling of road roughness spectrum.Secondly, combined with ANSYS Parametric Design Language by using iterative method and Component Mode Synthesis respectively, modal synthesis simulation the bridge-vehicle coupling vibration, and will compeare result of simulation and the on field test, to verify the simulation model with its comptuing parameters.Then, the vehicle brake and accelerate are considered in the bridge-vehicle coupling vibration, vehicle finite element model of marching direction function war established, and through comparison with the semi-analytical solution to verify its accuracy.Finally, summarizes research achievements, and points out the problems existing in the still, discusses briefly the direction of further research.