PSI - Issue 78

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 78 (2026) 489–496

© 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: Dissipative devices; experimental campaign; numerical modelling; FEM model In this study, starting from a previously refined numerical model validated with experimental tests, numerical analyses of USDD are performed to investigate the interaction among the device elements. Results reveal that the performance of USDDs is significantly affected by the interaction between their elements and the stiffness of the connection plates. This allows for design optimization, considering the expected seismic displacement, reducing the amount of steel required. 1. Introduction Hysteretic devices in earthquake engineering exploit the steel bending to dissipate energy. Usually, they are applied as auxiliary devices in seismic isolation systems. XX ANIDIS Conference Numerical investigation on U-Shaped Dissipative Devices and comparison with experimental results Annarita Palmiotta a, *, Alfonso Ferdinando Coniglio a , Michele D’Amato b , Rosario Gigliotti a a DISG, Dept. of Structural and Geotechnics Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184, Rome, Italy. b DIUSS, Dept. for Humanistic, Scientific and Social Innovation, University of Basilicata, Via Lanera, 75100 Matera, Italy. Abstract U-Shaped Dissipative Devices (USDDs) consist of U-Shaped Flexural Plates (USFPs) dissipating seismic energy through hysteretic behavior of steel. Recently, they are largely applied in seismic design since they have the advantage of being easy to assemble, install, and replace after a seismic event. Therefore, an essential challenge in structural engineering is to accurately predict their behavior during earthquakes, understanding the parameters influencing their energy dissipation capacity.

* Corresponding author. Tel.: +39 3270012385. E-mail address: annarita.palmiotta@uniroma1.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.2025.12.063