Structural Reinforcement of a Masonry Building

Abstract:

A structural reinforcement carried out on a 12th century mansion in masonry with the aim of a seismic improvement valued as a decrease in the Seismic Risk Class [4].The reinforcement technique combines the use of FRP systems with carbon fiber strips applied to the external perimeter walls and FRCM systems applied to the internal walls.The proposed solution allows the seismic improvement both in relation to local failure phenomena and in the overall behavior of the whole structure. Particular focus is given to the dimensional calculation of the reinforcements and to the combined contribution of the two techniques, highlighting the peculiarities of both. The FRP system is used to avoid overturning and to increase the resistance of the walls, while the FRCM system is used for the general improvement of the mechanical properties of the masonry. Particular attention is paid to the evaluation of the design resistance values related to the debonding failure by carrying on special technical measures in installation of aramid fiber or CFRP connectors.The intervention methodology allows an increase of the Seismic Risk Class of at least 3 levels, as deductible from the calculation of the PAM value.

• Periodical: Key Engineering Materials (Volume 817)
• Pages: 673-679
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.817.673
• Online since: August 2019
• Authors: Giovanni Cerretini*, Giorgio Giacomin
• Keywords: Fibre Reinforced Polymer (FRP), FRCM, Masonry, Seismic Risk

References

[1] Ministero delle Infrastrutture, D.M. 14.01.2008 Nuove norme tecniche per le costruzioni, Gazzetta Ufficiale n.29, (2008).

[2] Ministero delle Infrastrutture, Circolare n. 617 Istruzioni per l'applicazione delle Nuove norme tecniche per le costruzioni, di cui al D.M. 14 gennaio 2008, Gazzetta Ufficiale n.47, (2009).

[3] Consiglio Nazionale delle Ricerche, CNR-DT 200 R1/2013 Istruzioni per la progettazione, l'esecuzione ed il controllo di interventi di consolidamento statico mediante l'utilizzo di compositi fibrorinforzati, CNR, (2013).

DOI: 10.20333/25000136-2021-2-104

[4] Ministero Infrastrutture e Trasporti, D.M. 28.02.2017 n. 58 Approvazione delle linee guida per la classificazione di rischio sismico delle costruzioni nonché delle modalità per l'attestazione dell'efficacia degli interventi effettuati, Gazzetta Ufficiale (2017).

[5] Task Group 9.3, Externally bonded FRP reinforcement for RC structures, July (2011).