Deschamps, Jaril 
ORCID: https://orcid.org/0009-0002-1881-7126; Stolle, Jacob ORCID: https://orcid.org/0000-0003-0902-9339 et Van Bang, Damien Pham ORCID: https://orcid.org/0000-0001-8669-0724
(2025).
Negatively Buoyant Debris Impact under Tsunami-Like Flows.
Journal of Waterway, Port, Coastal, and Ocean Engineering
, vol. 151
, nº 6.
p. 2240.
DOI: 10.1061/JWPED5.WWENG-2240.
Résumé
Debris impact on critical infrastructure is a major cause of destruction during tsunami events. While the loading of positively buoyant debris (debris with a density lower than water) has been well researched, to the author’s knowledge, few studies have focused on the impact of negatively buoyant debris (debris with a density higher than water). To address this knowledge gap, this paper presents the results of an experimental program investigating the impact of negatively buoyant debris on a structure using a dam-break wave. Spherical debris scaled down to a 1:60 ratio was entrained by a bore wave to impact a cylindrical structure. The final velocity of negatively buoyant debris was shown to be lower than the bore front velocity, with a relative velocity decreasing with increasing density. The Stokes number of the debris was found to be a good parameter to approximate this relative speed. For the calculation of the impact force, a single-degree-of-freedom equation based on the contact stiffness model was found to be a good fit for the experimental data. However, this fit can be improved by incorporating an extra parameter dependent on the density and diameter of the debris.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | Added mass; Debris impact; Negatively buoyant; Stokes number; Tsunamis |
| Centre: | Centre Eau Terre Environnement |
| Date de dépôt: | 04 sept. 2025 20:17 |
| Dernière modification: | 04 sept. 2025 20:17 |
| URI: | https://espace.inrs.ca/id/eprint/16591 |
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