Interaction dynamics of a high-speed train moving on multi-span railway bridges with support settlements

0446894 - ÚTAM 2016 RIV BE eng C - Konferenční příspěvek (zahraniční konf.)
Yau, J. D. - Frýba, Ladislav
Interaction dynamics of a high-speed train moving on multi-span railway bridges with support settlements.
Proceedings of International conference on noise and vibration engineering (ISMA2014) and International conference on uncertainty in structural dynamics (USD2014). Leuven: Katholieke University Leuven, 2014 - (Sas, P.; Moens, D.; Denayer, H.), s. 955-963. ISBN 978-90-73802-91-9.
[International Conference on Noise and Vibration Engineering (ISMA). Leuven (BE), 15.09.2014-17.09.2014]
Institucionální podpora: RVO:68378297
Klíčová slova: loads * beams * railway bridge
Kód oboru RIV: JM - Inženýrské stavitelství
http://www.isma-isaac.be/publications/proceedings.html

After construction of rail bridges, differential support settlement at bridge foundations is one of the key issues being considered for running safety of trains and operation of railways. In this paper, the influence of ground settlement on dynamic interactions of train-bridge system will be studied. The train is simulated as a sequence of identical sprung mass units with equal intervals and the bridge system as a series of simple beams with identical properties. To resolve the train-induced vibrations of a beam structure with support settlements, the total beam response is decomposed into two parts: the static response due to vertical support settlement and the dynamic component caused by inertia effect of beam vibration. An exact solution for static displacement is presented by exerting the support displacements on the beam statically. Thus the remaining dynamic response of the vehicle/bridge coupling system can be computed by conventional vehicle-bridge interaction dynamic method. From the present study, the numerical results indicate that the inclusion of ground settlement is generally small on the bridge response, but it can amplify drastically the vertical response of the moving train. This conclusion is of significance in planning a rail route that has to cross a region with ground subsidence.
Trvalý link: http://hdl.handle.net/11104/0248864