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Zhou Y.-J.,Key Laboratory of Bridge Detection and Reinforcement Technology Ministry of Communication | Zhao Y.,Key Laboratory of Bridge Detection and Reinforcement Technology Ministry of Communication | He Q.-H.,Key Laboratory of Bridge Detection and Reinforcement Technology Ministry of Communication | Shi Q.-B.,Key Laboratory of Bridge Detection and Reinforcement Technology Ministry of Communication | Song Y.-F.,Key Laboratory of Bridge Detection and Reinforcement Technology Ministry of Communication
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2012

In order to study the sensitive influencial parameters of impact factors for rigid-continuous combined bridge, finite element model for bridge-vehicle coupled vibration was set up, in which the vehicle was simplified as a three axial half-car model. The influencial parameters include the frequency ratio between bridge and vehicle, the roughness of deck, the mass of vehicle, the damping ratio of vehicle, the velocity of vehicle, the driving mode of vehicle, the rigidity of bridge, the arrangement of bridge and the soil-structure-interaction mode. Orthogonal test table was then employed to study the structural impact factors with respect to deformation and bending moment at critical sections and thus to find the sensitive parameters. The results show that the impact factor for the combined bridge calculated according to the general code for design of highway bridges and culverts tends to be lower, and the frequency ratio between bridge and vehicle, the roughness of deck and the velocity of vehicle are the sensitive parameters affecting the impact factors. Therefore the impact factor should be interpreted as a function of muti-parameters rather than only one parameter. Source

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