MATEC Web Conf.
Volume 285, 201916th Symposium of Structural Dynamics (DYNKON 2019)
|Number of page(s)||8|
|Published online||12 July 2019|
Vibration damping in road bridges – two case studies of full scale experiments
Rzeszow University of Technology, The Faculty of Civil and Environmental Engineering and Architecture, 35-959 Rzeszów, Poland
* Corresponding author: firstname.lastname@example.org
The paper presents the results of a vibration damping analysis of two road viaducts. The analysis was based on displacement signals recorded during the dynamic load tests carried out before an acceptance process of the viaducts. To create an additional excitation, a 5 cm high threshold was located on the road during low-velocity passages. The Logarithmic Decrement (LD) was calculated using an exponential curve fit to free vibration amplitudes. A fundamental frequency of vibration was considered. To minimize the influence of signal imperfections, a filtration process was carried out using bandpass Infinite Impulse Response (IIR) Bessel filter. The results were correlated for various degrees of excitation resulting from different velocities of loading vehicles and the presence of the threshold. Examples of appropriate and inadequate signals for the damping analysis were shown.
© The Authors, published by EDP Sciences, 2019
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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