The Aurelian Column has been investigated by the ENEA Research Center and NHAZCA S.r.l. (Spin-off company of "Sapienza" University of Rome) in order to characterize its dynamic properties for the assessment of its health status. In one day field work, a seismometric array made up of 24 short period (1 s) single channel sensors have been installed from the base of the column up to its top and centralized to a single acquisition unit. Two interferometric coherent radar sensors were also temporary installed at a distance of 25 m from the base of the column in the surrounding square in two orthogonal directions, in order to integrate seismometric data. Main achieved results on the dynamic characteristics of the column are: two dominating translational frequencies very close each to the other, 1.26 and 1.32 Hz. By the analysis of the modal shapes for the achieved resonance frequencies, an anomaly is detected at about 25 m height, thus driving to hypothesize a mechanical discontinuity of the structure. © 2015, International Society for Structural Health Monitoring of Intelligent Infrastructure, ISHMII. All rights reserved.
Dynamic characterization of tower structures by means of interferometry measurements
Verrubbi, V.;Clemente, P.;Bongiovanni, G.
2015-01-01
Abstract
The Aurelian Column has been investigated by the ENEA Research Center and NHAZCA S.r.l. (Spin-off company of "Sapienza" University of Rome) in order to characterize its dynamic properties for the assessment of its health status. In one day field work, a seismometric array made up of 24 short period (1 s) single channel sensors have been installed from the base of the column up to its top and centralized to a single acquisition unit. Two interferometric coherent radar sensors were also temporary installed at a distance of 25 m from the base of the column in the surrounding square in two orthogonal directions, in order to integrate seismometric data. Main achieved results on the dynamic characteristics of the column are: two dominating translational frequencies very close each to the other, 1.26 and 1.32 Hz. By the analysis of the modal shapes for the achieved resonance frequencies, an anomaly is detected at about 25 m height, thus driving to hypothesize a mechanical discontinuity of the structure. © 2015, International Society for Structural Health Monitoring of Intelligent Infrastructure, ISHMII. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
