한국철도학회:학술대회논문집 (Proceedings of the KSR Conference)
- 한국철도학회 2003년도 춘계학술대회 논문집
- /
- Pages.337-342
- /
- 2003
주행차량에 의한 궤도 동적?성의 매개변수 분석
Parametric Analysis in Dynamic Characteristics of Railway Track due to Travelling Vehicle
- 발행 : 2003.05.01
초록
The dynamic load effects are conveyed to the railway bridges through tracks which are generated by moving trains The dynamic load effects may vary due to the dynamic characteristics of the applied vehicle loads and the railway bridges containing the track system. However, the track effects have been neglected or simplified by spring elements in the most studies since it is quite complex to consider the track systems in the dynamic analysis models of railway bridges. In this study, track system on railway bridges is modeled using a three-dimensional discrete-support model that can simulate the load carrying behavior of tracks. In addition, this program is developed with the precise 20-car model and a continuous PSC(prestressed concrete) box girder bridge, which is the main bridge type of Korea Train express(KTX). Three-dimensional elements are used for both. The dynamic response of railway bridges is found to be affected depending on whether the track model is considered or not. The influencing rate depends on the traveling speed and different wheel-axle distance. The dynamic bridge response is decreased remarkably by the track systems around the resonant frequency. Therefore, the resonance effect can be reduced by modifying the track properties in the railway bridge.
키워드