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Proceedings 2018, 2(8), 413; https://doi.org/10.3390/ICEM18-05286

In-Situ Experimental Modal Testing of Railway Bridges

1
REVOTEC, Department of Structural Dynamic, Engineering Company, 1070 Vienna, Austria
2
Austrian Institute of Technology, Mobility Department, 1210 Vienna, Austria
3
Vienna University of Technology, Institute of Structural Engineering / Steel Structures, 1040 Vienna, Austria
4
Austrian Federal Railway, Department of Bridge Structures, 1020 Vienna, Austria
Presented at the 18th International Conference on Experimental Mechanics, Brussels, Belgium, 1–5 July 2018.
*
Author to whom correspondence should be addressed.
Published: 30 May 2018
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Abstract

In this paper the potential application of experimental modal testing of railway bridges by application of the forced vibration excitation method is proposed to identify reliable and reproduceable values of the natural frequencies and damping coefficients. It will be shown, that the damping values that are determined by in-situ experimental modal testing are in most cases significant higher than the values given in EN 1991-2 and that the normative damping values are quite conservative. The measuring results of a framed concrete bridge with 16.1 m span length are presented and the dependence of dynamic parameters to seasonable temperature changes and to the size of bridge vibration amplitude will be discussed in detail.
Keywords: railway bridges; destabilization of ballast bed; natural frequency; structural damping; forced vibration excitation railway bridges; destabilization of ballast bed; natural frequency; structural damping; forced vibration excitation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Reiterer, M.; Lachinger, S.; Fink, J.; Bruschetini-Ambro, S.-Z. In-Situ Experimental Modal Testing of Railway Bridges. Proceedings 2018, 2, 413.

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