PSI - Issue 78

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 78 (2026) 309–316

© 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: Natech; seismic vulnerability; experimental tests; pipe-to-tank connection Abstract Industrial plants are particularly vulnerable to natural disasters like earthquakes. Seismic events could lead to major hazard accidents in industrial facilities, resulting in both structural and non-structural damages, loss of hazardous substances or disruption of plant’s activities. For that concerning major hazard industrial plants, the European Directive Seveso III emphasises the importance of conducting a safety assessment as part of the risk analysis process, focusing on the seismic evaluation of plant components, including tanks, pipelines and their connections. This paper focuses on the seismic vulnerability of pipe-to-tank connections, mainly related to the relative displacement between the pipe and the tank’s wall. A comprehensive understanding of these sources of vulnerability is essential for improving safety measures and designing more resilient systems in seismic-prone areas. This study presents the preliminary results of an experimental program developed in the framework of the MITPLANT project funded by INAIL (National Institute for Insurance against Accidents at Work). This research aims to evaluate the seismic response of pipe-to-tank connections under three different loading conditions, in terms of hysteretic response, failure mechanisms, and key response parameters. The results of the experimental tests will extend the knowledge regarding the dynamic interaction between tanks and pipelines and will provide valuable data to stakeholders and technicians dealing with the performance assessment of complex piping networks in industrial facilities. XX ANIDIS Conference Experimental seismic performance evaluation on pipe-to-tank connections Chiara Miglietta a *, Daniele Perrone a , Gianni Blasi a , Francesco Micelli a , Mariano Ciucci b a University of Salento, Complesso Ecotekne, via per Monteroni, 73100 Lecce, Italy b INAIL, Department of Technological Innovation and Safety of Plants, via Torraccio di Torrenova, 00133 Rome, Italy

* Corresponding author. Tel.: +39-0832297375 E-mail address: chiara.miglietta@unisalento.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.2025.12.040