Operational modal analysis and assessment of an historic RC arch bridge

Gentile, Carmelo; Gallino, N.

doi:10.2495/str070491

Cited by 4 publications

(2 citation statements)

References 2 publications

(1 reference statement)

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“…This method takes advantages from natural sources of vibration (wind, traffic, sea waves etc.) instead of having to shake the structure artificially [5,6]. The difficulty associated with output-only test is that the measured response is often noisy and contains the characteristics of the structure as well as the characteristics of the unknown excitation force.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Identification of the Sansepolcro (Italy) Museum and the Wall Supporting the Resurrection of Christ by Piero Della Francesca

Lacanna¹,

Ripepe²,

Deguy³

et al. 2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Dynamic identification is considered a powerful technique for testing the conservation status of buildings as their natural frequencies, damping and modal shapes are directly related to their rigidity and structural integrity. This issue is of crucial interest when historical structures are in area of high seismic level, as SanSepolcro city which has experienced earthquakes up to a maximum intensity of I max = X MCS scale. The dynamic response is suitable for ancient structures because is performed by measuring ambient vibrations instead of actively shaking the building. The results obtained from dynamic tests might be used to validate the assumptions used in numerical modeling in order to reduce the uncertainties related to the soil-structure interaction and to the structural parameters. In this framework, we show how an automatic identification procedure can track in real-time the dynamic response of the museum in Sansepolcro (Italy) using operational modal analysis (OMA). The dynamic characteristics, of the SanSepolcro museum and the wall supporting the mural painting of Resurrection of Christ, were identified by installing a temporary network of 10 seismic sensors. The OMA technique was performed using enhanced frequency domain decomposition (EFDD) which has allowed to detect the first four modal shapes, damping and structural frequencies. The dynamic characteristics were used to calibrate a more realistic and reliable 3D-FEM numerical model. Integrating, the results of the dynamic indetification with 3D-FEM model analysis, has provided important information to understand the complicated system of connections between the existing walls.

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Section: Introductionmentioning

confidence: 99%

Dynamic Identification of the Sansepolcro (Italy) Museum and the Wall Supporting the Resurrection of Christ by Piero Della Francesca

Lacanna¹,

Ripepe²,

Deguy³

et al. 2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

View full text Add to dashboard Cite

show abstract

“…Within a systematic surveillance program of the main infrastructures owned by the Province of Lecco -such as the Victory Bridge [3] and the new cable-stayed bridge on the Adda river [4,5] -three different ambient vibration tests were recently carried out on the roadway deck of the Paderno bridge by the VibLab (Laboratory of Vibrations and Dynamic Monitoring of Structures) of Politecnico di Milano. The first test, performed at the end of June 2009, was aimed at investigating the vertical dynamic characteristics of the bridge; subsequently, two other tests were carried out to check the variation over time of the previously identified resonant frequencies (September 2009) and to investigate the transverse dynamic behaviour (October 2009).…”

Section: Introductionmentioning

confidence: 99%