Dynamic analysis of the light-rail-station viaduct under moving vehicle loads

摘要

In this paper, a dynamic analysis of light-rail-station viaduct under moving vehicles is presented. Moving vehicles are idealized as moving load-sequence. The overhead and multi-stories' light-rail-station viaduct is modeled by the three-dimensional finite element model. Then when applying the time-integration to the dynamic system, the equations of motion are efficiently solved based on these models. The proposed structure is then applied to a real overhead and multi-stories light-rail-station viaduct with a group of moving vehicles. The braking forces, attractive forces and lateral sway forces are also taken into accounts which correspond with the accelerated and decelerated processes of moving vehicles when they enter and depart the station. The dynamic responses of the light-rail-station viaduct and the riding comfort indices are computed. The results show that the formulation presented in this paper can efficiently and effectively predict the dynamic response of light-rail-stations viaducts under a normal operation condition.