PSI - Issue 84

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 84 (2026) 789–796

© 2026 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 the scientific committee of the Conference Keywords: Seismic retrofitting;isolation;dissipation. Abstract A case study of a highway bridge seismic retrofitting by means of isolation and dissipation devices design is presented. Time history linear and nonlinear dynamics analyses have been conducted by means spectrum-compatible natural ground motions selected from various European seismic databases. The selection process of the ground motions was predominantly conditioned by the broad range of periods of interest for the specific structure (0.15 s < T < 3.5 s) evaluated through preliminary modal analyses. The natural ground motions selected from various European seismic databases have been appropriately scaled to ensure the spectrum compatibility required by current regulations (NTC2018). The optimal configuration is defined by means of a performance-based comparison of different types of isolation and dissipation devices. To ensure the reliability of seismic simulations, the key assumptions underlying nonlinear modelling are also discussed. III Fabre Conference: Existing Bridges, Viaducts, and Tunnels: Research, Innovation, and Applications Seismic retrofitting of a highway bridge by means of isolation and dissipation devices Giovanni Stasi a *, Maurizio De Angelis b , Giuseppe Lanzo b , Emanuele Renzi a , Armando Lanzi a , Galileo Tamasi a , Eugenio Francesco Mancinelli c a National Agency for Safety of Highway and Road Infrastructures, Viale del Policlinico, 2 – 00185 – Rome, Italy b Department of Structural and Geotechnical Engineering, University “La Sapienza”, Via Eudossiana 18, 00184 Rome, Italy c SEIPRO Srl, Via Paraguay, 5 – 00198 – Rome, Italy

* Corresponding author. Tel.: +39-338-205-9491. E-mail address: giovanni.stasi@ansfisa.gov.it

2452-3216 © 2026 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 the scientific committee of the Conference 10.1016/j.prostr.2026.06.101