PSI - Issue 78

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 78 (2026) 1374–1381

© 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 The testing program included, for each configuration, in-plane pseudo-static cyclic tests, dynamic out-of-plane shake table tests, and combined sequential tests in which infills were first subjected to in-plane loading and then to dynamic out-of-plane shaking until collapse. Key objectives included understanding the in-plane and out-of-plane responses, their interaction, the effects of damage progression and boundary conditions on failure mechanisms, and the influence of opening presence and infill thickness. Significant findings were obtained regarding force-displacement relationships, damage propagation, acceleration and displacement distributions, and arching/bending behaviour, offering valuable insights for the seismic assessment and safer design of masonry infills. The experimental data are publicly available at https://experiments.builtenvdata.eu/datasets/43/. XX ANIDIS Conference Experimental Campaign on the Seismic Response of Weak Clay Masonry Infills: In-Plane and Out-of-Plane Interaction via Shake Table Testing Riccardo Raimondo Milanesi a, *, Maithree Kurukulasuriya b , Guido Magenes a,b , Paolo Morandi a a Eucentre Foundation, via Ferrata 1, Pavia, Italy b Deparment of Civil Engineering and Architecture, via Ferrata 3, Pavia, Italy Abstract Masonry infills, commonly integrated into reinforced concrete (RC) and steel-framed buildings, are typically regarded as non structural elements. However, recent earthquakes have revealed their vulnerability to seismic actions, prompting extensive research into their seismic behaviour. Despite this, a review of the current literature highlights the need for further investigation to fully understand their dynamic response, particularly the influence of in-plane damage on out-of-plane performance. This paper presents a comprehensive experimental campaign currently ongoing at the Eucentre Foundation, aimed at examining the seismic behaviour of horizontally hollowed clay masonry infills — a typology widely used in Mediterranean countries during the 1960s – 1980s. Full-scale, single-story, single-bay infill panels were constructed within steel-concrete composite frames and tested under various boundary conditions: fully connected on all edges, with top or side gaps, with different masonry unit thicknesses (12 cm and 8 cm), and with or without openings.

* Corresponding author. E-mail address: riccardo.milanesi@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.2025.12.175