Operational modal testing and FE model tuning of a cable-stayed bridge
- 1 June 2011
- journal article
- Published by Elsevier BV in Engineering Structures
- Vol. 33 (6), 2063-2073
- https://doi.org/10.1016/j.engstruct.2011.02.046
Abstract
The paper presents the results obtained from the application of different output-only modal identification techniques to ambient response data collected in two dynamic tests of a cable-stayed bridge and the subsequent finite element model correlation analysis. The first test, performed by using a traditional data acquisition system with servo-accelerometers, was aimed at investigating the vertical dynamic characteristics of the bridge. In the second test, an innovative radar vibrometer was used for non-contact measurement of deflection time series of the forestays and the identification of local natural frequencies of the stay cables.\ud In the theoretical study, vibration modes were determined using a 3D Finite Element model of the bridge and the information obtained from the field tests, combined with a classic system identification technique, provided a linear elastic model, accurately fitting the modal parameters of the bridge in its present conditionKeywords
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