Author(s)

L Fryba

Abstract

The railway bridges may be intensively excited due to the high speed trains. Therefore, a simple theoretical model of a bridge was subjected to a row of axle forces which are moving along it. The integral transformation method, the Heaviside and Dirac functions expressed the solution in a comprehensive form. The numerical solution brings the deflection-time, bending moment- time and vertical acceleration-time histories of a bridge. The paper shows the effect of the speed up to 500 km/h and span (5 to 50 m) on the dynamic increments of bridge deflections due to three types of high speed trains, ICE 2, Eurostar and Talgo AV 2.

Keywords