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EN 1991-1-8:2026

Eurocode 1 - Actions on structures - Part 1-8: Actions from waves and currents on coastal structures

Edition date: 2026-10-01
In Force
Available languages: English, French
Summary: 1.1 Scope of EN 1991 1 8 (1) EN 1991 1 8 gives principles and rules to determine the values of wave and current actions on structures and civil engineering works in the coastal zone, i.e. works connected to, or in close vicinity to the shore. NOTE 1 Provisions in EN 1991 1 8 are limited to hydrodynamic actions that can be directly quantified in terms of wave and/or current induced pressures and associated forces and moments on structures or structural parts. NOTE 2 As opposed to offshore conditions, waves or currents in the coastal zone are generally affected by the presence of the seabed or shore. NOTE 3 The coastal zone is typically defined as the area between the shoreline and the deep-water limit. (2) EN 1991 1 8 describes the principles for defining the hydrodynamic conditions to be used for design, including sea water levels. (3) EN 1991 1 8 addresses specifically actions from currents and waves on the following structure types: — cylindrical structures; — subsea pipelines; — suspended decks; — vertical face structures; — permanently moored floating structures. NOTE 1 Additional guidance can be needed for: — moored structures in the coastal zone for renewable energy production or related to oil and gas production or processing; — moored structures spanning areas with variable wave and current states (e.g. floating aquaculture farms or floating bridges). NOTE 2 For hydraulic pressures caused by quasi-static water levels, and ground water, see EN 1997 (all parts). (4) Actions addressed in EN 1991 1 8 do not cover: — hydraulic resonance in sheltered areas or basins (phenomena also known as harbour resonance); — translation waves, e.g. tsunamis; — waves and currents induced by maritime operations, i.e. vessel wake, berthing and mooring; — hydrodynamic actions induced by earthquakes; — ice-induced pressures and forces; — coastal structures where flood risk and/or erosion or sediment management is the dominant function. 1.2 Assumptions (1) The assumptions given in EN 1990 apply to this document. (2) In addition, it is assumed that actions from waves and currents on coastal structures are determined by personnel appropriately qualified and experienced in the following fields: a) physical coastal environment including physics of waves and currents, statistical properties and propagation of such; b) marine hydrodynamics, wave and current interaction with structures in general and wave and current actions on structures in the coastal zone including i) fixed structures, and ii) floating structures; c) advanced methods including probabilistic methodology and physical model testing.

1.1 Anwendungsbereich von EN 1991 1 8 (1) EN 1991 1 8 enthält Grundsätze und Regeln zum Bestimmen der Werte von Wellen und Strömungseinwirkungen auf Bauwerke und Ingenieurbauwerke im Küstengebiet, d. h. Bauten in Verbindung mit der oder in unmittelbarer Nähe zur Küste. ANMERKUNG 1 Die in EN 1991 1 8 angegebenen Bestimmungen sind auf hydrodynamische Einwirkungen begrenzt, die direkt in Bezug auf wellen und/oder strömungsinduzierte Drücke sowie zugehörige auf Tragwerke oder Bauwerksteile einwirkende Kräfte und Momente quantifiziert werden können. ANMERKUNG 2 Im Gegensatz zu Bedingungen auf offener See werden Wellen oder Strömungen im Küstengebiet im Allgemeinen durch das Vorhandensein von Meeresboden oder Küste beeinflusst. ANMERKUNG 3 Das Küstengebiet wird üblicherweise als der Bereich zwischen der Küstenlinie und der Tiefwassergrenze definiert. (2) EN 1991 1 8 beschreibt die Grundsätze zum Definieren der für die Bemessung zu verwendenden hydrodynamischen Bedingungen, einschließlich Meeresspiegel. (3) EN 1991 1 8 behandelt insbesondere Einwirkungen infolge Strömungen und Wellen auf die folgenden Tragwerkstypen:  zylindrische Bauwerke;  Unterwasser-Rohrleitungen;  Hängedecks;  Bauwerke mit vertikaler Fläche;  dauerhaft festgemachte schwimmende Bauwerke. ANMERKUNG 1 Zusätzliche Hinweise können erforderlich sein für:  festgemachte Bauwerke im Küstengebiet für die Erzeugung von erneuerbarer Energie oder in Bezug auf die Förderung oder Verarbeitung von Öl und Gas;  festgemachte Bauwerke, die Flächen mit veränderlichen Wellen und Strömungszuständen (z. B. schwimmende Aquakulturanlagen oder schwimmende Brücken) überspannen. ANMERKUNG 2 Zu Wasserdrücken infolge quasi-statischer Wasserstände und Grundwasser siehe EN 1997 (alle Teile). (4) Die in EN 1991 1 8 behandelten Einwirkungen decken Folgendes nicht ab:  hydraulische Resonanz in geschützten Bereichen oder Becken (auch als Hafenresonanz bekannte Erscheinungen);  Translationswellen, z. B. Tsunamis;  Wellen und Strömungen infolge Seeverkehr, d. h. Nachstrom, Anlegen und Festmachen von Wasserfahrzeugen;  hydrodynamische Einwirkungen infolge Erdbeben;  Drücke und Kräfte infolge Eisbildung;  Küstenbauwerke, bei denen der Umgang mit Überflutungsrisiken und/oder das Erosions oder Sedimentmanagement die überwiegende Funktion darstellt. 1.2 Voraussetzungen (1) Für dieses Dokument gelten die Voraussetzungen nach EN 1990. (2) Darüber hinaus wird vorausgesetzt, dass Einwirkungen auf Küstenbauwerke infolge Wellen und Strömung durch Personal bestimmt werden, das angemessen erfahren und qualifiziert ist auf den folgenden Gebieten: a) physikalische Küstenumgebung einschließlich Physik von Wellen und Strömungen, statistische Eigenschaften und deren Ausbreitung; b) Hydrodynamik des Meeres, Wellen und Strömungsinteraktionen mit Bauwerken im Allgemeinen sowie Wellen und Strömungseinwirkungen auf Bauwerke in Küstengebieten einschließlich i) fester Bauwerke und ii) schwimmender Bauwerke; c) erweiterte Verfahren, einschließlich wahrscheinlichkeitsbasierter Methodik und physikalischer Modellprüfungen.

1.1 Domaine d'application de l'EN 1991-1-8 (1) L'EN 1991-1-8 donne des principes et des règles pour déterminer les valeurs des actions des vagues et des courants sur les structures et les ouvrages de génie civil situés dans la zone côtière, c'est-à-dire les ouvrages connectés au rivage ou à proximité immédiate de celui-ci. NOTE 1 Les dispositions de la norme EN 1991-1-8 se limitent aux actions hydrodynamiques qui peuvent être di-rectement quantifiées en termes de pressions induites par les vagues et/ou les courants et des forces et moments associés sur les structures ou les éléments de structure. NOTE 2 Les vagues ou les courants dans la zone côtière, contrairement aux zones éloignées en mer, sont générale-ment affectés par la présence du sol marin ou du rivage. NOTE 3 La zone côtière est généralement définie comme la zone située entre le littoral et la limite des eaux pro-fondes. (2) L'EN 1991-1-8 décrit les principes pour la définition des conditions hydrodynamiques à utiliser dans le dimensionnement, y compris les niveaux d’eau. (3) L'EN 1991-1-8 traite spécifiquement des actions des courants et des vagues sur les types de structures suivantes : - structures cylindriques ; - conduites sous-marines ; - tabliers et dalles surélevées ; - structures à parement vertical ; - structures flottantes ancrées en permanence. NOTE 1 Des recommandations supplémentaires peuvent être nécessaires pour : - les structures amarrées dans la zone côtière destinées à la production d'énergies renouvelables ou liées à la production ou au traitement du pétrole et du gaz ; - les structures amarrées couvrant des zones soumises à des conditions variables en matière de vagues et de courants (par exemple, fermes aquacoles flottantes ou ponts flottants). NOTE 2 Pour les pressions hydrauliques causées par les niveaux d'eau quasi statiques, et pour les eaux souterraines, voir l'EN 1997 (toutes les parties). (4) Les actions mentionnées dans l'EN 1991-1-8 ne couvrent pas : - la résonance hydraulique dans les zones abritées ou les bassins (phénomène également connu sous le nom de résonance portuaire) ; - les ondes de translation, par exemple les tsunamis ; - les vagues et courants induits par les opérations maritimes, c'est-à-dire le sillage des navires, l'accos-tage et l'amarrage ; - les actions hydrodynamiques induites par les tremblements de terre ; - les pressions et forces induites par la glace ; - les structures côtières pour lesquelles le risque d'inondation et/ou la gestion de l'érosion et des sé-diments est la fonction dominante. 1.2 Hypothèses (1) Les hypothèses données dans l'EN 1990-1 s'appliquent au présent document. (2) De plus, on suppose que les actions provenant des vagues et des courants sur les structures côtières sont déterminées par un personnel dûment qualifié et expérimenté dans les domaines suivants : a) La physique du milieu côtier, y compris la physique des vagues et des courants, leur propagation, leurs propriétés statistiques ; b) L’hydrodynamique marine, l’interaction des vagues et des courants avec les structures en général et les actions des vagues et des courants sur les structures dans la zone côtière, y compris i) les structures fixes, et ii) les structures flottantes ; c) Les méthodes avancées, y compris la méthode probabiliste et les essais sur modèles physiques.

ICS: 91.010.30-Technical aspects
CTN: CEN/TC 250 - 6231

Modificaciones Normas

Es modificada por EN 1991-1-8:2026/prA1

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