Abstract
The purpose of paper analyzes influence of random road roughness on dynamic impact factor of Bridge subjected to a moving vehicle. The road roughness is assumed by a stationary random process. The bridge has three spans which is modeled by FEM. The moving vehicle has three axles and is idealized by 6-DOFs. Monte-Carlo method is used to create the random road roughness input. The governing equation of dynamic vehicle-bridge interaction is established by means of d’Alembert’s principle. Galerkin method and Green theory are applied to discrete the governing equation in the space domain. In this paper, Runge-Kutta methodology was used to solve the governing equation in the time domain. After analyzing with a series profile of road roughness input, it is going to obtain the response of bridge output which is also the random process. The FEM analysis totally agrees with the test results of KhueDong Bridge. Furthermore, the road roughness also was investigated to clarify the effects on dynamic impact factor.
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