Abstract
The conventional seismic design standard specifies a modeling way of train action on insufficient grounds. The aim of this paper is to clarify the mechanism of dynamic interaction between a train vehicle and a structure and to develop a reasonable modeling way of train action for seismic design of structure. The conclusions are as follows: 1) dynamic interaction is dominated by creep force between wheel flange and rail in the case of small vehicle response and by contact force between them in the case of large vehicle response; 2) the way in which train is modeled by assuming a train as a rigid mass gives most reasonable results for seismic design; 3) more accurate modeling of train action requires to consider the creep force and high-order vibration modes as well as the stiffness of vehicle.
