Control of the vibration acceleration of simple and continuous railway bridge surfaces with average span lengths under the effect of high-speed trains

Abstract

Controlling the maximum acceleration (a_max) of the bridge deck under the influence of a train is considered one of the important criteria determining the safety and operational stability of high-speed railway bridge structures. Eurocodes or TCVN 13594:2022 standards specify the exact values of a_max for the case of a spherical surface with/ or without ballast, however, there are no specific instructions on how to determine this parameter. Therefore, in cases where the design standard requires dynamic model analysis of the bridge structure, the maximum value a_max will be obtained from calculations using specialized structural analysis software. In cases where dynamic structural analysis of the bridge is not required, determining the maximum value of a_max will be difficult. This article presents the results of using a simplified method to evaluate the amax value for several types of simple and continuous bridge structures with medium span lengths commonly used on high-speed railways, aiming to contribute to bridge design on high-speed railway lines in Vietnam.