title: Radar detection of pedestrian-induced vibrations on Michelangelo's David.
abstract: This paper summarizes the results of a two-day dynamic monitoring of Michelangelo's David subject to environmental loads (city traffic and pedestrian loading induced by tourists visiting the Accademia Gallery). The monitoring was carried out by a no-contact technique using an interferometric radar, whose effectiveness in measuring the resonant frequencies of structures and historic monuments has proved over the last years through numerous monitoring activities. Owing to the dynamic behavior of the measurement system (radar and tripod), an accelerometer has been installed on the radar head to filter out the movement component of the measuring instrument from the measurement of the David's displacement. Measurements were carried out in the presence and absence of visitors, to assess their influence on the dynamic behavior of the statue. A numerical model of the statue was employed to evaluate the experimental results.
authors.affiliation: Department of Information Engineering (DINFO), University of Florence, Florence, Italy.
authors.forename: Massimiliano
authors.initials: M
authors.lastname: Pieraccini
authors.affiliation: Department of Civil and Environmental Engineering (DICEA), University of Florence, Florence, Italy.
authors.forename: Michele
authors.identifier: http://orcid.org/0000-0002-8389-3355
authors.initials: M
authors.lastname: Betti
authors.affiliation: University of San Marino, San Marino, Republic of San Marino.
authors.forename: Davide
authors.initials: D
authors.lastname: Forcellini
authors.affiliation: Florence Engineering s.r.l., Florence, Italy.
authors.forename: Devis
authors.initials: D
authors.lastname: Dei
authors.affiliation: Department of Information Engineering (DINFO), University of Florence, Florence, Italy.
authors.forename: Federico
authors.initials: F
authors.lastname: Papi
authors.affiliation: Department of Civil and Environmental Engineering (DICEA), University of Florence, Florence, Italy.
authors.forename: Gianni
authors.initials: G
authors.lastname: Bartoli
authors.affiliation: Department of Civil and Environmental Engineering (DICEA), University of Florence, Florence, Italy.
authors.forename: Luca
authors.initials: L
authors.lastname: Facchini
authors.affiliation: Department of Civil and Environmental Engineering (DICEA), University of Florence, Florence, Italy.
authors.forename: Riccardo
authors.initials: R
authors.lastname: Corazzi
authors.affiliation: Department of Civil and Environmental Engineering (DICEA), University of Florence, Florence, Italy.
authors.forename: Vladimir Cerisano
authors.initials: VC
authors.lastname: Kovacevic
mesh_terms: D061725:Accelerometry; D004777:Environment; D006801:Humans; D007368:Interferometry; D008962:Models, Theoretical; D009144:Museums; D000069636:Pedestrians; D011825:Radar; D012613:Sculpture; D014186:Transportation; D014732:Vibration