In the present paper, the dynamic behaviour of a TAV viaduct of Italian high-speed railway close to Modena (IT) is investigated. The viaduct consists of precast single C concrete beams with span 31.50 meters long and 9.00 meters wide (Fig. 1A). Clean span is 29.00 meters long. Beams are simply-supported to cantilever circular piers with 3.50 meters diameter. Beam cross section consists of a concrete deck 0.60 meters thick and lateral wings 0.7 to 0.8 meters thick. The main purpose of this study is the characterization of dynamic behaviour of the viaduct using both time domain and frequency domain methods. Identified parameters are modal frequencies, mode shapes and damping ratios. Results obtained adopting different time and frequency domain methods are compared.Experimental natural frequencies, modes and damping ratios have been evaluated starting from Frequency Response Function (FRF) by using the MDOF Circle Fit Method and Auto-Regressive Moving Average Vector (ARMAV) models.
Modal identification of a TAV viaduct using subspace models / Vincenzi, Loris; C., Mazzotti; M., Savoia. - ELETTRONICO. - (2006), pp. 1-10. (Intervento presentato al convegno 2nd International FIB Congress tenutosi a Naples nel June, 5 - 8).
Modal identification of a TAV viaduct using subspace models
VINCENZI, Loris;
2006
Abstract
In the present paper, the dynamic behaviour of a TAV viaduct of Italian high-speed railway close to Modena (IT) is investigated. The viaduct consists of precast single C concrete beams with span 31.50 meters long and 9.00 meters wide (Fig. 1A). Clean span is 29.00 meters long. Beams are simply-supported to cantilever circular piers with 3.50 meters diameter. Beam cross section consists of a concrete deck 0.60 meters thick and lateral wings 0.7 to 0.8 meters thick. The main purpose of this study is the characterization of dynamic behaviour of the viaduct using both time domain and frequency domain methods. Identified parameters are modal frequencies, mode shapes and damping ratios. Results obtained adopting different time and frequency domain methods are compared.Experimental natural frequencies, modes and damping ratios have been evaluated starting from Frequency Response Function (FRF) by using the MDOF Circle Fit Method and Auto-Regressive Moving Average Vector (ARMAV) models.
Pubblicazioni consigliate
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris
