Abstract
We have studied the derailment and overturning of railway vehicles during earthquakes. Numerical simulation clarified dynamic behaviors and running safety limits of a vehicle on a vibrating track. The results of the simulation are now effectively used for the design of railway structures. And vibration tests using a half-body car mounted on a shinkansen bogie were performed, that confirmed the validity of the numerical analysis. These results were premised on the sin wave vibration. This paper shows behaviors of vehicle on an observed vibration during an earthquake based on numerical simulation. And we suggest running safety limits for seismic motions that can be used in seismic design of railway structures.
