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Seismic performance of masonry walls retrofitted with steel reinforced grout
Author(s) -
De Santis Stefano,
Casadei Paolo,
De Canio Gerardo,
Felice Gianmarco,
Malena Marialaura,
Mongelli Marialuisa,
Roselli Ivan
Publication year - 2016
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.2625
Subject(s) - masonry , grout , mortar , structural engineering , earthquake shaking table , geotechnical engineering , seismic retrofit , engineering , masonry veneer , geology , reinforced concrete , materials science , composite material
Summary An innovative solution for the seismic protection of existing masonry structures is proposed and investigated through shake table tests on a natural scale wall assemblage. After a former test series carried out without reinforcement, the specimen was retrofitted using Steel Reinforced Grout. The strengthening system comprises horizontal strips of ultra‐high strength steel cords, externally bonded to the masonry with hydraulic lime mortar, and connectors to transversal walls, applied within the thickness of the plaster layer. In order to assess the seismic performance of the retrofitted wall, natural accelerograms were applied with increasing intensity up to failure. Test results provide a deep understanding of the effectiveness of mortar‐based composites for improving the out‐of‐plane seismic capacity of masonry walls, in comparison with traditional reinforcements with steel tie‐bars. The structural implications of the proposed solution in terms of dynamic properties and damage development under earthquake loads are also discussed.Copyright © 2015 John Wiley & Sons, Ltd.