Communications - Scientific Letters of the University of Zilina 2019, 21(1):59-67 | DOI: 10.26552/com.C.2019.1.59-67

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

Milan Moravcik1
1 Faculty of Civil Engineering, University of Zilina, Slovakia

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.

Keywords: dynamic response of the railway bridges; acceleration; resonant speed; modal superposition method

Received: October 12, 2018; Accepted: November 9, 2018; Published: February 20, 2019  Show citation

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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. doi: 10.26552/com.C.2019.1.59-67
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