Acceleration Response of the Railway Bridges –Verification of the Limit State of Acceleration

https://doi.org/10.26552/com.C.2019.1.59-67

  • Milan Moravcik
DOI: https://doi.org/10.26552/com.C.2019.1.59-67
Keywords: dynamic response of the railway bridges, acceleration, resonant speed, modal superposition method

Abstract

The dynamic response of a girder bridge under trains is studied with an emphasis on the vertical track acceleration. The vehicles are modelled as a series of moving loads. The efficiency of the method is demonstrated on the simply supported railway bridge of the length Lb = 38m subjected to the series of the bogie forces of the conventional IC train. The closed-form solution of the bridge response with the intention to resonance and cancellation effects is applied. The acceleration response is investigated for the resonance train speed c = 65 m/s = 234 km/h, considering the modes of vibration j = 1 and j = 1+3, because higher modes can have significant influence on the acceleration amplitude. The limits of acceleration due to the ballast stability and the traffic safety are evaluated.

Author Biography

Milan Moravcik

Faculty of Civil Engineering, University of Zilina, Slovakia

Published
2019-02-20
How to Cite
Moravcik, M. (2019). Acceleration Response of the Railway Bridges –Verification of the Limit State of Acceleration. Communications - Scientific Letters of the University of Zilina, 21(1), 59-67. https://doi.org/10.26552/com.C.2019.1.59-67
Issue
Vol 21 No 1 (2019)
Section
Civil Engineering in Transport