Latest revision as of 14:19, 30 November 2021

Abstract

The paper deals with the strengthening of thin masonry vaults by means of a CRM (Composite Reinforced Mortar) strengthening technique based on Glass Fiber-Reinforced Polymer (GFRP) meshes embedded in a 30 mm thick mortar matrix, applied at the vault extrados or intrados and connected to the masonry abutments through steel bars and GFRP elements. The experimental campaign concerned quasi static cyclic tests performed on four full-scale samples, supporting their self-weight only and subjected to uniform horizontal transversal loading. The results of the tests are described in terms of crack pattern, failure mode and load-displacement graphs, referring both to the horizontal displacement monitored at the crown section and to the sliding at the spring sections. High improvements in terms of both resistance and displacement capacities emerged in respect to the plain masonry and the connection with the abutments resulted fundamental for ensuring the reinforcement effectiveness.

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References

[1] Brumana, R., Condoleo, P., Grimoldi, A., Landi, A.G. Shape and construction of brick vaults. Criteria, methods and tools for a possible catalogue. In: The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XLII-5/W1 (2017). Geomatics & Restoration – Conservation of Cultural Heritage in the Digital Era, 22–24 May 2017, Florence, I.

[2] Nunziata, A., Bianchini, N., D’Andrea, M., E., Serpe. Le volte in foglio e il sisma. Analisi delle chiese nell’area Umbro-Marchigiana. In: IV Convegno di Ingegneria Forense - VII Convegno su crolli, affidabilità strutturale, consolidamento, 14-16 September 2017, Milan, I (in Italian).

[3] Indirli, M., Kouris, L.A.S., Formisano, A., Borg, R.P., Mazzolani, F.M. Seismic Damage Assessment of Unreinforced Masonry Structures After The Abruzzo 2009 Earthquake: The Case Study of the Historical Centers of L'Aquila and Castelvecchio Subequo. International Journal of Architectural Heritage: Conservation, Analysis and Restoration (2013), 7(5), 536-578.

[4] Jurina, L. The reinforced arch: a new technique for strengthening masonry arches and vaults using metal tie bars. In: 16th National Congress of the C.T.A. (1997) Ancona, I.

[5] Capozucca, R., Analysis of thin composite masonry vaults. Masonry International (1997) 11(1): 19-25.

[6] Castori, G., Borri, A., Corradi, M. Behavior of thin masonry arches repaired using composite materials. Composites Part B: Engineering (2016) 87:311-321.

[7] Briccoli Bati, S., Rovero, L., Tonietti, U. Strengthening masonry arches with composite materials. Journal of Composite for Construction (2007) 11(1):33–41.

[8] Garmendia, L., Marcos, I., Garbin, E., Valluzzi, MR. Strengthening of masonry arches with Textile-Reinforced Mortar: experimental behaviour and analytical approaches. Materials and Structures (2014) 47:2067–80.

[9] Alecci, V,, Focacci, F., Rovero, L., Stipo, G., De Stefano, M. Extrados strengthening of brick masonry arches with PBO–FRCM composites: Experimental and analytical investigations. Composite Structures (2016) 149:184–96.

[10] Gattesco, N., Boem, I. Strengthening of masonry vaults through a thin extradoxal layer of fiber reinforced lime mortar. In: 10th International Conference on Structural Analysis of Historical Constructions, 13-15 September 2016, Leuven, B.

[11] Gattesco, N., Boem, I., Andretta, V. Experimental behaviour of non-structural masonry vaults reinforced through fibre-reinforced mortar coating and subjected to cyclic horizontal loads. Engineering Structures (2018) 172: 419–431.