MATEC Web of Conferences
Volume 24, 2015EVACES’15, 6th International Conference on Experimental Vibration Analysis for Civil Engineering Structures
|Number of page(s)||6|
|Section||Vibration testing and measurement techniques|
|Published online||19 October 2015|
Pilot testing of a hydraulic bridge exciter
1 Royal Institute of Technology, Division of Structural Engineering and Bridges, Stockholm, Sweden
2 The Swedish Transport Administration, (Trafikverket), Sweden
3 Tyréns AB, Stockholm, Sweden
a Corresponding author: Mahir.Ulker-Kaustell@tyrens.se
This paper describes the development of a hydraulic bridge exciter and its first pilot testing on a full scale railway bridge in service. The exciter is based on a hydraulic load cylinder with a capacity of 50 kN and is intended for controlled dynamic loading up to at least 50 Hz. The load is applied from underneath the bridge, enabling testing while the railway line is in service. The system is shown to produce constant load amplitude even at resonance. The exciter is used to experimentally determine frequency response functions at all sensor locations, which serve as valuable input for model updating and verification. An FE-model of the case study bridge has been developed that is in good agreement with the experimental results.
© Owned by the authors, published by EDP Sciences, 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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