Dynamic responses of a train-track-bridge coupled system under earthquakes

Abstract The probability of a train running over bridge when an earthquake occurs is increasing with the total mileage China’s high-speed railway network expanding. To study this issue, three-dimensional train-track-bridge dynamic interaction system subjected to seismic excitations established based on commercial mathematical software. Besides, set motion equations are derived according multibody dynamics, finite element method theory and theory. Moreover, in order response bridges under earthquake, series experiments conducted scaled simple supported model ballastless track slab excited by shaking table tests. Meanwhile, strain rails, slabs, base plates girder various working conditions measured quasi-distributed optical fiber sensing stuck members. At last, each structure member demonstrated time frequency domains. Furthermore, isolation performance members, such as fasteners, cement asphalt (CA) mortar layer so on, explained details.