PSI - Issue 78

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 78 (2026) 1745–1752

© 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of XX ANIDIS Conference organizers Keywords: masonry retrofitting, steel plate, shear buckling, finite element analysis, seismic performance. Abstract This study presents a numerical investigation on a retrofitting system for nonductile masonry walls, based on the use of regular steel grids and thin steel web plates bonded to the wall surface with epoxy resin. The research is structured in multiple phases. First, a linear buckling analysis is performed on different steel grid geometries to assess their elastic response. Based on these results, nonlinear static analyses are conducted on selected configurations, both with and without thin ductile steel web plates, to evaluate their global behavior. The most effective systems are then adopted as a strengthening solution for masonry walls to assess numerically their seismic performance. A parametric study is finally carried out to examine the influence of web plate thickness on the maximum shear capacity. The results confirm that the addition of thin ductile steel web plates significantly improves the lateral strength of the walls while allowing for a reduction in steel usage. 1. Introduction A variety of retrofitting techniques have been developed to enhance the seismic performance of non-ductile structural components (Ceroni et al., 2014). These include fiber-reinforced polymers (FRP) (Sandoli et al., 2019 and Mazzotti et al., 2009, Ferracuti et al., 2020), fiber-reinforced cementitious matrix (FRCM) systems (Nerilli and Ferracuti, 2022, Ferretti and Mazzotti 2021), and steel fiber-reinforced composites (Islam et al., 2012, Borri et al.,2019. XX ANIDIS Conference Seismic retrofitting of masonry walls using regular steel grids and steel web plates Hadi Monsef Ahmadi a , Maria Zucconi a *, Antonio Formisano b and Barbara Ferracuti a a Department of Engineering, Niccolò Cusano University, Via Don Carlo Gnocchi 3, Rome, 00166, Italy b Department of Structures for Engineering and Architecture, University of Naples Federico II, Via Claudio 21, Naples, 80125, Italy

* Corresponding author. Tel.: +39-06-4567-8350; fax: +30-06-4567-8379. E-mail address: maria.zucconi@unicusano.it

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of XX ANIDIS Conference organizers 10.1016/j.prostr.2025.12.222