As a part of a research project co-founded by the European Community, a series of 15 damage tests were performed on a prestressed concrete highway bridge in Switzerland. The ambient response of the bridge was recorded for each damage case. A dense array of instruments allowed the identification of a modal model with a total of 408 degrees of freedom. Six modes were identified in the frequency range from 0 to 16.7 Hz. The objective of this paper is to demonstrate the effectiveness of the Frequency Domain Decomposition (FDD) technique for modal identification of large structures. A second objective is to show the application of the FDD method as an efficient way to perform health monitoring of civil engineering structures. The modal properties, frequencies, damping ratios and mode shapes for the different damage cases were compared with those for the undamaged bridge.
|Titel||Proceedings of the SEWC2002 Structural Engineers World Congress|
|Forlag||Japan Structural Consulting Association (JSCA)|
|Status||Udgivet - 2007|
|Begivenhed||SEWC2002 Structural Engineers World Congress - Yokohama, Japan|
Varighed: 9 okt. 2002 → 12 okt. 2002
|Konference||SEWC2002 Structural Engineers World Congress|
|Periode||09/10/2002 → 12/10/2002|