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Low-impact techniques for seismic strengthening fair faced masonry walls

TitoloLow-impact techniques for seismic strengthening fair faced masonry walls
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2021
AutoriDe Santis, S., AlShawa O., de Felice G., Gobbin F., Roselli Ivan, Sangirardi M., Sorrentino L., and Liberatore D.
RivistaConstruction and Building Materials
Volume307
ISSN09500618
Parole chiave2016–2017 central italy earthquake, 3DVision, Accelerograms, Brick, Carbon fiber reinforced plastics, Carbon fiber reinforced polymer, Carbon fibers, Carbon fibre reinforced polymer, Central Italy, Composite connector, Composite reinforced mortar, Earthquakes, Graphic methods, Masonry construction, Mortar, Mortar joint repointing, Mortar joints, Mortar-based composite, Natural accelerogram, Reinforced mortar, Reinforcement, Repointing, Retaining walls, Shake-table tests, Stainless steel, Steel fibers, Strengthening (metal), Walls (structural partitions)
Abstract

Two techniques for the seismic strengthening of fair faced rubble masonry walls are proposed and tested on a shake table. The first solution entails the use of carbon fibre reinforced polymer connectors installed from outside through the natural stone units, without perforating the entire wall thickness, thus leaving the internal wall surface undisturbed. In the second solution, stainless-steel cords are embedded in repointed mortar joints of the fair face and connected, by means of stainless-steel bars, to a thermo-insulating composite reinforced mortar applied to the internal side. Shake table tests were performed under natural accelerograms on real scale multi-leaf rubble masonry walls, built with the stone units retrieved from the debris of a hamlet heavily damaged in the 2016 Central Italy earthquakes. Both strengthening solutions proved effective in enhancing the seismic capacity by preventing leaf separation and masonry disintegration, and in limiting damage development under earthquake excitation. Thanks to the compatibility with original materials and the preservation of the fair face, they are suitable for mitigating the seismic vulnerability of architectural heritage. © 2021 Elsevier Ltd

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85115799127&doi=10.1016%2fj.conbuildmat.2021.124962&partnerID=40&md5=17df69f408fe687d06771ee85fd9ce92
DOI10.1016/j.conbuildmat.2021.124962
Citation KeyDeSantis2021