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Keywords: structural health monitoring, operational modal analysis, finite element model, masonry tower, historical building.

Abstract

Masonry towers are quite widespread in Europe and represent an important portion of the built heritage that must be preserved, especially in high-seismicity regions. Very often, such masonry towers exhibit unique peculiar morphologic and typological characteristics, which might affect their different structural behaviours under horizontal loads. For this reason, accurate knowledge of their dynamical parameters is useful for seismic assessment and the design of risk mitigation interventions. In this work, the opportunities provided by dynamic identification techniques for the non-destructive evaluation of heritage structures are discussed with a focus on the Civic Tower and its annexes, located in Matelica, a village of Marche region (Italy). They were stricken by a long seismic sequence (Center Italy earthquakes between August and October 2016) and are investigated in detail in order to have an insight into their dynamic behaviour. Furthermore, the experimental investigations and the operational modal analysis results are presented, they are useful for defining the Finite Element (FE) model of the complex with a continuum approach. The monitoring system consists of several elements adequately connected. Many operative problems have conditioned the positioning of the instrumentation due to the limited accessibility of the structure, not only to the primary access but also to reach the top. However, it has been possible to identify with certain confidence the first five frequencies and their corresponding mode shapes. The results carried out after the updating procedure may be considered very good. The material data values estimated in this way will constitute an important reference for the evaluation of the state of the building.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 3 PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: B.H.V. Topping and J. Kruis Paper 8.4 Dynamic Identification and Numerical Calibration of a Masonry Tower F. Bianconi¹, G. Standoli¹, E. Giordano¹, A. Ferrante² and F. Clementi¹ ¹Dept. of Civil and Building Engineering, and Architecture, Polytechnic University of Marche, Ancona, Italy ²ILaboratoire de Mécanique et Génie Civil (LMGC), CNRS, University of Montpellier, France doi:10.4203/ccc.3.8.4 Full Bibliographic Reference for this paper F. Bianconi, G. Standoli, E. Giordano, A. Ferrante, F. Clementi, "Dynamic Identification and Numerical Calibration of a Masonry Tower", in B.H.V. Topping, J. Kruis, (Editors), "Proceedings of the Fourteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 3, Paper 8.4, 2022, doi:10.4203/ccc.3.8.4 Keywords: structural health monitoring, operational modal analysis, finite element model, masonry tower, historical building. Abstract Masonry towers are quite widespread in Europe and represent an important portion of the built heritage that must be preserved, especially in high-seismicity regions. Very often, such masonry towers exhibit unique peculiar morphologic and typological characteristics, which might affect their different structural behaviours under horizontal loads. For this reason, accurate knowledge of their dynamical parameters is useful for seismic assessment and the design of risk mitigation interventions. In this work, the opportunities provided by dynamic identification techniques for the non-destructive evaluation of heritage structures are discussed with a focus on the Civic Tower and its annexes, located in Matelica, a village of Marche region (Italy). They were stricken by a long seismic sequence (Center Italy earthquakes between August and October 2016) and are investigated in detail in order to have an insight into their dynamic behaviour. Furthermore, the experimental investigations and the operational modal analysis results are presented, they are useful for defining the Finite Element (FE) model of the complex with a continuum approach. The monitoring system consists of several elements adequately connected. Many operative problems have conditioned the positioning of the instrumentation due to the limited accessibility of the structure, not only to the primary access but also to reach the top. However, it has been possible to identify with certain confidence the first five frequencies and their corresponding mode shapes. The results carried out after the updating procedure may be considered very good. The material data values estimated in this way will constitute an important reference for the evaluation of the state of the building. download the full-text of this paper (PDF, 8 pages, 326 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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