Techno Press
Techno Press

Earthquakes and Structures   Volume 8, Number 5, May 2015, pages 1113-1126
DOI: http://dx.doi.org/10.12989/eas.2015.8.5.1113
 
Damage detection and localization on a benchmark cable-stayed bridge
Marco Domaneschi, Maria Pina Limongelli and Luca Martinelli

 
Abstract     [Full Text]
    A damage localization algorithm based on Operational Deformed Shapes and known as Interpolation Damage Detection Method, is herein applied to the finite element model of a cable stayed bridge for detecting and localizing damages in the stays and the supporting steel beams under the bridge deck. Frequency Response Functions have been calculated basing on the responses of the bridge model to low intensity seismic excitations and used to recover the Operational Deformed Shapes both in the transversal and in the vertical direction. The analyses have been carried in the undamaged configuration and repeated in several different damaged configurations. Results show that the method is able to detect the damage and its correct location, provided an accurate estimation of the Operational Deformed Shapes is available. Furthermore, the damage detection algorithm results effective also when damages coexist at the same time at several location of the cable-stayed bridge members.
 
Key Words
    cable-stayed bridge; damage localization; Operational Deformed Shapes; interpolation method
 
Address
Marco Domaneschi, Luca Martinelli: Department of Civil and Environmental Engineering, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy

Maria Pina Limongelli: Department of Architecture, Built Environment and Construction Engineering, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy
 

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