PSI - Issue 78

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 78 (2026) 73–80

© 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: target reliability indexes; uniform-hazard approach; risk-targeted approach; seismic design; seismic risk Abstract This study highlights the need to transition from a traditional uniform-hazard approach to a risk-targeted methodology in seismic design and assessment. Specifically, a seismic action calibration model is proposed, aiming to ensure uniform reliability across different types of constructions, both for new designs and for the assessment of existing constructions. The model is applied to the Italian territory, where seismic hazard varies from site to site. The results offer valuable insights into the expected impact of adopting a risk-targeted approach on a national scale, emphasizing the potential benefits in terms of structural safety, economic efficiency, and code modernization. Furthermore, a procedure is presented for deriving target reliability indexes, calibrated according to recent international research and evolving performance-based design standards. 1. Introduction In recent years, design approaches that lead to uniform risk over a given territory have become more relevant, replacing the traditional Uniform Hazard Approach (UHA). The latter defines seismic actions using response spectra XX ANIDIS Conference Towards a reliability-based approach for the seismic design: an application to the Italian territory Matteo Tatangelo a, *, Lorenzo Audisio a , Michele D’Amato b , Rosario Gigliotti a , Franco Braga 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, Matera 75100, Italy

* Corresponding author. E-mail address: matteo.tatangelo@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.2025.12.010