Research on Dynamic Characteristics of Mechanical Fast Loading Trolley Bridge in the Urban Rail Construction
With the rapid development of urban rail transit, more and more rail projects such as light railway and subway have been constructed in recent years. Rail constructions often locate in the main roads and always occupy a part of road, so the traffic capacity of the original road declines drastically and traffic jams occur. For the car playing a remarkable role in the traffic jams, this paper puts forward two types of structure, steel trussed girder-bridge and steel trussed cable-stayed bridge, as the car overpass, which is a special path only for cars. Presented and analyzed the model of the structures by the finite element program of ANSYS, the results of model analysis show that the strength and safety of the two structures can both meet the relevant specifications. Making further efforts on comparison of mechanics and construction features, the steel trussed cable-stayed bridge has been presented, for its advantages of quickly assembled with standard unit of steel truss cable-stayed, light weighted, self-balanced, rapid construction, and less damage to the road surface