EN IEC 61400-6:2020
(Main)Wind energy generation systems - Part 6: Tower and foundation design requirements
Wind energy generation systems - Part 6: Tower and foundation design requirements
IEC 61400-6:2020 specifies requirements and general principles to be used in assessing the structural integrity of onshore wind turbine support structures (including foundations). The scope includes the geotechnical assessment of the soil for generic or site specific purposes. The strength of any flange and connection system connected to the rotor nacelle assembly (including connection to the yaw bearing) are designed and documented according to this document or according to IEC 61400-1. The scope includes all life cycle issues that may affect the structural integrity such as assembly and maintenance.
Windenergieanlagen - Teil 6: Auslegungsanforderungen an Türme und Fundamente
Systèmes de génération d’énergie éolienne – Partie 6: Exigences en matière de conception du mât et de la fondation
l'IEC 61400-6:2020 spécifie les exigences et les principes généraux à utiliser pour évaluer l'intégrité structurelle des structures de support d'éolienne terrestre (y compris les fondations). Le domaine d'application inclut l'évaluation géotechnique du sol en fonction des besoins génériques ou spécifiques au site. La résistance d'une bride et le système de connexion relié à l'ensemble rotor – nacelle (y compris la connexion au palier du dispositif d’orientation) sont conçus et documentés selon le présent document ou selon l'IEC 61400-1. Le domaine d'application inclut toutes les questions liées au cycle de vie qui peuvent avoir un impact sur l'intégrité structurelle (le montage et l'entretien, par exemple).
Sistemi za proizvodnjo energije na veter - 6. del: Stolp in obravnava temeljnih zahtev (IEC 61400-6:2020)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2020
Sistemi za proizvodnjo energije na veter - 6. del: Stolp in obravnava temeljnih
zahtev (IEC 61400-6:2020)
Wind energy generation systems - Part 6: Tower and foundation design requirements
(IEC 61400-6:2020)
Windenergieanlagen - Teil 6: Auslegungsanforderungen an Türme und Fundamente
(IEC 61400-6:2020)
Systèmes de génération d’énergie éolienne – Partie 6: Exigences en matière de
conception du mât et de la fondation (IEC 61400-6:2020)
Ta slovenski standard je istoveten z: EN IEC 61400-6:2020
ICS:
27.180 Vetrne elektrarne Wind turbine energy systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 61400-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2020
ICS 27.180
English Version
Wind energy generation systems - Part 6: Tower and foundation
design requirements
(IEC 61400-6:2020)
Systèmes de génération d’énergie éolienne - Partie 6 : Windenergieanlagen - Teil 6: Auslegungsanforderungen an
Exigences en matière de conception du mât et de la Türme und Fundamente
fondation (IEC 61400-6:2020)
(IEC 61400-6:2020)
This European Standard was approved by CENELEC on 2020-05-26. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61400-6:2020 E
European foreword
The text of document 88/751/FDIS, future edition 1 of IEC 61400-6, prepared by IEC/TC 88 "Wind
energy generation systems" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 61400-6:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-02-26
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-05-26
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 61400-6:2020 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
ISO 148-1 NOTE Harmonized as EN ISO 148-1
ISO 9001 NOTE Harmonized as EN ISO 9001
ISO/IEC 17025 NOTE Harmonized as EN ISO/IEC 17025
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 61400-1 2019 Wind energy generation systems - Part 1: EN IEC 61400-1 2019
Design requirements
IEC 61400-2 - Wind turbines - Part 2: Small wind turbines EN 61400-2 -
IEC 61400-3-1 2019 Wind energy generation systems - Part 3-1: EN IEC 61400-3-1 2019
Design requirements for fixed offshore wind
turbines
ISO 2394 2015 General principles on reliability for - -
structures
ISO 22965-1 - Concrete - Part 1: Methods of specifying - -
and guidance for the specifier
ISO 22965-2 - Concrete - Part 2: Specification of - -
constituent materials, production of
concrete and compliance of concrete
ISO 22966 - Execution of concrete structures - -
ISO 6934 series Steel for the prestressing of concrete - -
ISO 6935 series Steel for the reinforcement of concrete - -
ISO 9016 2012 Destructive tests on welds in metallic EN ISO 9016 2012
materials - Impact tests - Test specimen
location, notch orientation and examination
ISO 12944 series Paints and varnishes - Corrosion protection - -
of steel structures by protective paint
systems
EN 1993-1-9 2005 Eurocode 3: Design of steel structures - - -
Part 1-9: Fatigue
EN 1993-3-2 2006 Eurocode 3: Design of steel structures - - -
Part 3-2: Towers, masts and chimneys -
Chimneys
IEC 61400-6 ®
Edition 1.0 2020-04
INTERNATIONAL
STANDARD
colour
inside
Wind energy generation systems –
Part 6: Tower and foundation design requirements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.180 ISBN 978-2-8322-8004-1
– 2 – IEC 61400-6:2020 © IEC 2020
CONTENTS
FOREWORD . 9
INTRODUCTION . 11
1 Scope . 12
2 Normative references . 12
3 Terms and definitions . 13
4 Symbols and abbreviated terms . 17
4.1 Symbols . 17
4.2 Abbreviated terms . 19
5 Design basis including loading . 20
5.1 General . 20
5.2 Basis of design . 20
5.2.1 Basic principles . 20
5.2.2 Durability . 21
5.2.3 Principles of limit state design . 21
5.2.4 Structural analysis . 21
5.2.5 Assessments by tests . 22
5.3 Materials . 22
5.4 Loads. 22
5.4.1 Use of IEC 61400-1 or IEC 61400-2 load cases and partial safety
factors for loads . 22
5.4.2 Superseding of IEC 61400-1 or IEC 61400-2 partial safety factors for
materials . 22
5.4.3 Serviceability load levels . 23
5.4.4 Load combinations in ULS . 24
5.4.5 Structural damping values to be used in load calculations . 25
5.4.6 Definitions and methods for use of internal loads . 25
5.4.7 Definition of required load data for fatigue analysis . 25
5.4.8 Definition of required load data for extreme load level . 25
5.4.9 Vortex induced vibration . 26
5.4.10 Loads due to geometric tolerances and elastic deflections in tower
verticality . 26
5.5 Load data and interface reporting requirements . 27
5.5.1 Purpose . 27
5.5.2 Wind turbine specification . 27
5.5.3 Time history data . 28
5.5.4 Load origins . 28
5.5.5 Load components . 28
5.6 General structural design requirements . 28
5.6.1 Secondary structural influence . 28
5.6.2 Fatigue analysis . 28
5.7 Delivery documentation . 28
6 Steel towers . 29
6.1 General . 29
6.2 Basis of design . 29
6.3 Materials . 29
6.3.1 General . 29
6.3.2 Structural steels . 29
IEC 61400-6:2020 © IEC 2020 – 3 –
6.3.3 Bolts and anchors . 32
6.4 Ultimate strength analysis for towers and openings . 32
6.4.1 General . 32
6.4.2 Partial safety factors . 32
6.4.3 Verification of ultimate strength . 32
6.4.4 Tower assessment . 32
6.4.5 Detail assessments. 33
6.5 Stability. 33
6.5.1 General . 33
6.5.2 Partial safety factor. 34
6.5.3 Assessment . 34
6.5.4 Door frames/stiffeners . 34
6.6 Fatigue limit state . 35
6.6.1 General . 35
6.6.2 Partial safety factor for materials . 35
6.6.3 Assessment . 36
6.6.4 Details . 36
6.7 Ring flange connections . 36
6.7.1
...
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