Giamundo, Vincenzo (2014) Seismic assessment and retrofit of historical masonry barrel vaults. [Tesi di dottorato]

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Item Type: Tesi di dottorato
Lingua: English
Title: Seismic assessment and retrofit of historical masonry barrel vaults
Creators:
CreatorsEmail
Giamundo, Vincenzovincenzo.giamundo@unina.it
Date: 29 March 2014
Number of Pages: 202
Institution: Università degli Studi di Napoli Federico II
Department: Strutture per l'Ingegneria e l'Architettura
Scuola di dottorato: Ingegneria industriale
Dottorato: Ingegneria dei materiali e delle strutture
Ciclo di dottorato: 26
Coordinatore del Corso di dottorato:
nomeemail
Mensitieri, Giuseppegiuseppe.mensitieri@unina.it
Tutor:
nomeemail
Manfredi, GaetanoUNSPECIFIED
Lignola, Gian PieroUNSPECIFIED
Date: 29 March 2014
Number of Pages: 202
Uncontrolled Keywords: Seismic assessment; Masonry vaults; Seismic retrofit; Shaking table tests; FEM Analysis;
Settori scientifico-disciplinari del MIUR: Area 08 - Ingegneria civile e Architettura > ICAR/09 - Tecnica delle costruzioni
Date Deposited: 13 Apr 2014 11:05
Last Modified: 30 Apr 2016 01:00
URI: http://www.fedoa.unina.it/id/eprint/9763

Abstract

Recent earthquakes in Italy highlighted the extreme vulnerability of historical buildings. Masonry vaults, which represent artistic valuable elements, have been recognised as the most vulnerable elements of such buildings. Therefore, the knowledge of their seismic performances, as well as potential retrofit techniques, meets the need to protect cultural heritage buildings which are prone to natural hazards. Vault dynamic behaviour is generally studied according to simplified methods or, as an alternative, to complex Finite Element (FE) analyses. However, a deep knowledge of their dynamic behaviour is still lacking from an experimental point of view. In order to investigate the seismic behaviour of masonry vaults, shaking table tests have been performed of a full scale masonry barrel vault. After the tests, the vault has been retrofitted by means of mortar joint repointing, grout injections and Inorganic Matrix FRP Grid (IMG). Then shaking table tests have been performed on the retrofitted vault. By means of the experimental tests outcomes, reliable numerical models able to predict the dynamic behaviour of the masonry vault (before and after the retrofit) have been developed. This aspect is relevant for studying characteristics which cannot be investigated by means of the experimental test monitoring. In this thesis a comprehensive overview of the main results of the experimental tests is reported. The unreinforced vault exhibits a good seismic behaviour, showing very slight damage up to a horizontal acceleration of about 4.8 m/s2 (measured at the keystone location). The retrofit resulted in a significant increase of both stiffness and capacity. Indeed, very slight damages only after the last test (performed with an achieved PGA of 11.70 m/s2) were detected on the retrofitted vault. However the retrofit did not drastically change the global dynamic behaviour of the vault.

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