PSI - Issue 78

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 78 (2026) 1293–1301

© 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 Infills; RC buildings; Seismic Design and Verification; Design Guidelines; Codified Procedures; RELUIS. 1. Introduction This work summarizes the main aspects of the Guidelines for the Seismic Design and Verification of Masonry Infill Walls in Reinforced Concrete (RC) Buildings, to be published in a forthcoming Reluis Volume (Morandi et al. 2025a). Although primarily focused on RC structures, some principles may cautiously extend to infills in steel frames. The first version of the Guidelines originates from research promoted by the masonry industry and are largely based Abstract This paper summarizes key aspects of the Guidelines for the Seismic Design and Verification of Masonry Infill Walls in Reinforced Concrete (RC) Buildings, developed through research coordinated by eight Italian institutions and mainly supported by DPC Reluis. The Guidelines, primarily intended for RC structures, provide design and detailing criteria for masonry infills that interact with the surrounding frame. Applicable to ordinary buildings with typical story heights, they address different infill typologies, non-ductile, reinforced, and ductile, and propose modelling strategies (simplified and detailed) for both linear and nonlinear analysis. Particular emphasis is placed on in-plane displacement checks, local effects on RC elements, out-of-plane resistance evaluation (including in-plane/out-of-plane interaction), and the impact of infills on global structural irregularities. The Guidelines aim to support the seismic design and verification of masonry infills, complementing Eurocodes and Italian standards (NTC2018). XX ANIDIS Conference Guidelines for seismic design and verification of masonry infills in RC buildings Paolo Morandi a, *; Paolo Ricci b , Guido Magenes a,c a Eucentre Foundation, via Ferrata 1,27100 Pavia, Italy b University of Naples Federico II, Italy c Department of Civil Engineering and Architecture, University of Pavia, Italy

* Corresponding author. E-mail address: paolo.morandi@eucentre.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.2025.12.165