RT Journal Article
SR Electronic
A1 Moravcik, Milan
T1 Acceleration Response of the Railway Bridges - Verification of the Limit State of Acceleration
JF Communications - Scientific Letters of the University of Zilina
YR 2019
VO 21
IS 1
SP 59
OP 67
DO 10.26552/com.C.2019.1.59-67
UL https://komunikacie.uniza.sk/artkey/csl-201901-0009.php
AB 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.