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Open AccessArticle

Dynamic Assessment of Axial Load in Tie-Rods by Means of Acoustic Measurements

by Carlo Resta 1,*,†, Giuseppe Chellini 2,† and Anna De Falco 1,†
1
Department of Energy, Systems, Territory and Construction Engineering, Università di Pisa, 56122 Largo Lucio Lazzarino, Pisa, Italy
2
Department of Civil and Industrial Engineering, Università di Pisa, 56122 Largo Lucio Lazzarino, Pisa, Italy
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Buildings 2020, 10(2), 23; https://doi.org/10.3390/buildings10020023
Received: 2 December 2019 / Revised: 10 January 2020 / Accepted: 22 January 2020 / Published: 5 February 2020
Tie-rods are structural elements of crucial importance in ancient buildings to ensure structural integrity and safety, so the assessment of their effectiveness via an estimation of the axial load is of great importance. Dynamic techniques are often employed using accelerometers to measure the frequency response of the tie-rods. In this work, the frequency response of tie-rods is obtained with acoustic recording, thus introducing general-purpose microphones to potentially replace more expensive and complex sensors in this application. Two microphones were tested, one of known technical characteristics, and a second for which they were unknown. A procedure was designed to overcome the technical limitations of the latter, and two experimental campaigns were conducted to test the proposed method. View Full-Text
Keywords: tie-rod axial load; cultural heritage; frequency response; contactless; acoustic measurements; low-cost device; dynamic identification tie-rod axial load; cultural heritage; frequency response; contactless; acoustic measurements; low-cost device; dynamic identification
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MDPI and ACS Style

Resta, C.; Chellini, G.; De Falco, A. Dynamic Assessment of Axial Load in Tie-Rods by Means of Acoustic Measurements. Buildings 2020, 10, 23.

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