Title: Experimental Contribution of the JRC ELSA laboratory for the Assessment and Control of Vibration of Structures and Cables
Citation: Proceedings of the 4th World Conference on Structural Control and Monitoring(4WCSCM); ISBN: 9780979496004 (CD-ROM) vol. 4th (2006) p. 382 (1-8)
Publisher: Department of Civil Engineeding, University of Southern California
Publication Year: 2006
JRC N°: JRC33193
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC33193
Type: Articles in periodicals and books
Abstract: The Joint Research Centre (JRC) of the European Commission (EC) is engaged since many years in research towards safety in structural mechanics mainly through the European Laboratory for Structural Assessment (ELSA, site of Ispra, Varese, Italy). The Laboratory contributes also to the assessment and the validation of innovation methodologies, technologies and systems for the control of vibration of structures and cables. ELSA gave a major contribution to two important European projects both partially funded by the EC General Directorate for Research. The first, titled “Active control in Civil Engineering (ACE)”, aiming at validating active systems for the control of vibrations of cable stayed bridges; the second, titled “Integrated Monitoring and Assessment of Cables (IMAC)”, aiming at better understanding of the vibration characteristics of the cables of bridges and validating of new diagnostic systems. In the framework of the project ACE, JRC contributed to the validation of the active control system performing a testing campaign on a large-scale mock-up of cables stayed bridge. The aim was to damp the cables and deck vibrations by using active hydraulic actuators in series with the two longest cables. The results showed that the system induces very high damping in the structure (until about 13%) and contributes to a very strong reduction of the bridge-deck vibration (from about 40 cm to 2-3 cm). In the framework of the project IMAC, JRC contributed by building a new facility allowing the installation of four cables 40-m long with inclination of about 22-degree. Tests for both ambient and forced vibrations have been performed and the results stored in the ELSA Internet accessible Database to be used by the Partners for assessment and interpretation as well as for the validation of non-destructive monitoring systems.
JRC Directorate:Space, Security and Migration

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