In this thesis, the running safety of high-speed railway vehicles(K-TGV) subjected to earthquake loading is studied. A computer program is developed, which can simulate dynamic responses of vehicles subjected to earthquake loading. The analysis considers two types of vehicles: i.e. a 2-axle vehicle with 13 DOF's and a power car of K-TGV with 38 DOF's. It can also consider the interaction with the substructure, a prestressed concrete box girder bridge with 40m span which is a typical bridge constructed for Kyung-Bu High-speed Railway.
The dynamic behavior of the vehicle is analyzed, while the track is subjected to lateral vibration due to earthquakes. El Centro record and several cases of simulated earthquakes compatible with the Korean Railway Design Codes are considered. The creep force module developed in this study is verified, and the results of this study are compared with those of others.
Based on the results of this study, the running safety of the K-TGV can be confirmed against El Centro earthquake. However the risk of derailment increases for the earthquake which has low frequency components. So it may be necessary to enhance the soil stiffness, if the stiffness of the soil layer is not large enough.
