Masonry vaults strengthened with a GFRP reinforced mortar coating: evaluation of the resisting peak ground acceleration
Natalino Gattesco1 , Ingrid Boem2
1, 2Department of Engineering and Architecture, University of Trieste, Trieste, Italy
Journal of Measurements in Engineering, Vol. 6, Issue 4, 2018, p. 181-189.
Received 11 September 2018; received in revised form 5 November 2018; accepted 30 November 2018; published 31 December 2018
The reinforcement of existing masonry vaults against seismic actions is an extremely timing issue and it has already involved many researchers in experimental testing and numerical modelling. However, up to now, the results of the research have been expressed and compared in terms of load-displacement capacity curves. But the designers, in the practice, need to assess the resisting peak ground acceleration of the vault (PGA), so to compare it with the seismic demand. In the paper, a strategy to evaluate this parameter, based on the modified Capacity Spectrum Method and accounting for the level of the vault in the building is proposed. The procedure is applied to a case study of a masonry building with barrel vaults, comparing the performances of plain vaults and vaults strengthened with a GFRP (Glass Fiber Reinforced Polymer) reinforced mortar coating. The results evidenced significant improvements in terms of PGA after the reinforcement, attaining to values from 3.1 to 3.3 times that of the unreinforced vault.
- Application of a fiber-reinforced mortar coating, at the extrados or intrados, to strengthen masonry vaults
- Experimental and numerical investigation on vaults subjected to lateral loads, to prove the effectiveness
- Definition of a strategy to evaluate the resisting Peak Ground Acceleration associated to the vault
Keywords: seismic vulnerability, masonry vaults, GFRP, floor response spectrum.
The financial supports of “Reluis 2017” and of “Fibre Net S.r.l.” (Pavia di Udine, Italy) are gratefully acknowledged.
- Briccoli Bati S., Rovero L., Tonietti U. Strengthening masonry arches with composite materials. Journal of Composite Constructions, Vol. 11, Issue 1, 2007, p. 33-41. [Publisher]
- 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, Vol. 149, 2016, p. 184-96. [Publisher]
- De Santis S., Roscini F., De Felice G. Retrofitting masonry vaults with basalt textile reinforced mortar. Key Engineering Materials, Vol. 747, 2017, p. 250-257. [Publisher]
- Garmendia L., Larrinaga P., San Mateos R., San-José J.-T. Strengthening masonry vaults with organic and inorganic composites: an experimental approach. Materials and Design, Vol. 85, 2015, p. 102-14. [Publisher]
- Gattesco N., Boem I. Experimental behavior of non-structural masonry vaults reinforced through fibre-reinforced mortar coating and subjected to cyclic horizontal loads. Engineering Structures, Vol. 172, 2018, p. 419-431. [Publisher]
- Gattesco N., Boem I. Parametric study on the seismic behavior of masonry vaults strengthened with composite reinforced mortar. Proceedings of the 10th International Masonry Conference, Milan, Italy, 2018. [CrossRef]
- Degli Abbati S., Cattari S., Lagomarsino S. Proposal of floor spectra for the verification of non-structural elements and local mechanisms in masonry buildings. Proceedings of the 17th National Conference on Seismic Engineering ANIDIS, Pistoia, Italy, 2017. [CrossRef]
- Ramaglia G., Lignola G. P., Prota A. Collapse analysis of slender masonry barrel vaults. Engineering Structures, Vol. 114, 2016, p. 86-100. [Publisher]
- Clemente P. Introduction to dynamics of stone arches. Earthquake Engineering and Structural Dynamics, Vol. 27, 1998, p. 513-522. [Publisher]
- EN 1998-1:2004: Eurocode 8: Design of Structures for Earthquake Resistance – Part 1: General Rules, Seismic Actions and Rules for Buildings. Brussels, 2004. [CrossRef]
- FEMA274: NEHRP Commentary on the Guidelines for the Seismic Rehabilitation of Buildings. Building Seismic Safety Council, Washington, 1997. [CrossRef]
- Fajfar P. Capacity spectrum method based on inelastic demand spectra. Earthquake Engineering and Structural Dynamics, Vol. 28, 1999, p. 979-993. [Publisher]
- Freeman S. A. Review of the development of the capacity spectrum method. ISET Journal of Earthquake Technology, Vol. 41, Issue 1, 2004, p. 1-13. [CrossRef]
- Gattesco N., Boem I. Assessment of the seismic capacity increase of masonry buildings strengthened through the application of GFRM coatings on the walls. International Journal of Masonry Research and Innovation, Vol. 2, Issue 4, 2017, p. 300-320. [Publisher]