PSI - Issue 62

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

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ScienceDirect

Procedia Structural Integrity 62 (2024) 633–639

II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) Bridges in small basins with intense sediment transport and debris flow Michele Larcher a *, Giuseppe Tito Aronica b , Francesco Ballio c , Pierluigi Claps d , Francesco Comiti a , Cristiana Di Cristo e , Stefano Lanzoni f , Laura Longoni c , Andrea Menapace a , Monica Papini c , Anna Prati a , Giorgio Rosatti g , Donatella Termini h , Andrea Vacca e , Daniel Zugliani f a Libera Università di Bolzano, Piazza Università 1, 39100 Bolzano, Italy b Università degli Studi di Messina, Contrada Di Dio, 98166 Villaggio S. Agata – Messina, Italy

c Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy d Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy e Università degli Studi di Napoli Federico II, Via Claudio 21, 80125 Napoli, Italy f Università degli Studi di Padova, Via Loredan 18, 35131 Padova, Italy g Università degli Studi di Trento, Via Mesiano 77, 38050 Trento, Italy h Università degli Studi di Palermo, Viale delle Scienze, 90128 Palermo, Italy

Abstract In Italy a significant part of the bridge collapses are due to hydraulic causes. Despite this, the Italian technical construction standards NTC 2018 provide few indications about the design and verification criteria of bridges with respect to river processes. In 2022, a working group on the "Hydraulic Compatibility of Bridges" (sites.google.com/view/gii-ponti) was set up within the Italian Group of Hydraulics (GII - Gruppo Italiano di Idraulica), with the aim of formulating proposals for good practices and guidelines for assessing the bridge hydraulic compatibility, as a basis for both bridge safety and flood risk analysis. The working subgroup on "small basins" aims to provide analysis tools for small river basins: they have peculiar features, requiring the adoption of appropriate criteria for the analysis of forcing scenarios and safety measures to be implemented for the hydraulic compatibility of river-crossing bridges. Particular attention is devoted to climatic changes that, although gradual, can induce strongly non-linear responses. The present manuscript reviews the current best practice for analyzing the hydrologic response, the

* Corresponding author. Tel.: +39-0471-017694. E-mail address: michele.larcher@unibz.it

2452-3216 © 2024 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 Scientific Board Member s

2452-3216 © 2024 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 Scientific Board Members 10.1016/j.prostr.2024.09.088