Title: Assessment of the seismic capacity increase of masonry buildings strengthened through the application of GFRM coatings on the walls

Authors: Natalino Gattesco; Ingrid Boem

Addresses: Department of Engineering and Architecture, University of Trieste, Piazzale Europa 1, Trieste 34127, Italy ' Department of Engineering and Architecture, University of Trieste, Piazzale Europa 1, Trieste 34127, Italy

Abstract: The results of a numerical investigation on the seismic performances of masonry buildings strengthened through the application of a glass fibre-reinforced mortar (GFRM) coating are presented. Four different building configurations were modelled (two and three storey, regular and non-regular in plan); solid brick and rubble stone masonry were considered. A simplified modelling method (equivalent frame method) was adopted, with concentration of the non-linear response in shear and bending 'plastic hinges'. Some difficulties needed to be faced for strengthened masonry, so to consider the effect of the reinforcement in available commercial computer codes. The non-linear static analysis provided the capacity curves of the structures. Moreover, by applying the modified capacity spectrum method, it was possible to compare the performances in terms of maximum resisting ground acceleration. The results evidenced for the reinforced buildings increase ranging from 1.8 to 2.6 times that of unreinforced ones, proving the effectiveness of the reinforcement technique.

Keywords: composite materials; equivalent frame method; fibre-reinforced mortar; masonry structures; numerical simulations; pushover analysis; reinforced masonry; seismic retrofitting.

DOI: 10.1504/IJMRI.2017.10008291

International Journal of Masonry Research and Innovation, 2017 Vol.2 No.4, pp.300 - 320

Received: 10 Nov 2016
Accepted: 25 Mar 2017

Published online: 04 Oct 2017 *

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