oSIST prEN 1998-1-1:2022
(Main)Eurocode 8 - Design of structures for earthquake resistance - Part 1-1: General rules and seismic action
Eurocode 8 - Design of structures for earthquake resistance - Part 1-1: General rules and seismic action
1.1 Scope of prEN 1998-1-1
(1) This document is applicable to the design and verification of buildings and other structures in seismic regions. It gives general rules relevant to all types of structures, with the exception of special structures.
NOTE Special structures belong to consequence class CC4, which is not fully covered by the Eurocodes. The categories of structures of consequence class CC4 where EN 1998, or parts of it, apply in a country can be provided by the relevant Authorities or can be found in the National Annex.
(2) This document provides basic performance requirements and compliance criteria applicable to buildings and civil engineering works in seismic regions.
(3) This document gives rules for the representation of seismic actions and the description of the design seismic situations. Certain types of structures, dealt with in other parts of EN 1998, need supplementary rules which are given in those relevant Parts.
(4) This document contains general methods for structural analysis and verification under seismic actions, including base-isolated structures and structures with distributed dissipative systems.
(5) This document 1 contains rules for modelling and verification of ultimate strengths and deformations.
1.2 Assumptions
(1) The general assumptions of prEN 1990:2021, 1.2, are supplemented as given in (2) to (6).
(2) It is assumed that no change in the structure and in the masses carried by the structure will take place during the construction phase or during the subsequent life of the structure with respect to the design unless proper justification and verification is provided. This applies to ancillary elements as well (see 3.1.2). Due to the specific nature of the seismic response, this applies even in the case of changes that lead to an increase of the structural resistance.
(3) The design documents are assumed to indicate the sizes, the details and the properties of the materials of the structural members. If appropriate, the design documents are also assumed to include the properties of special devices to be used and the distances between structural and ancillary elements. The necessary quality control provisions are assumed to be specified.
(4) Members of special structural importance requiring special checking during construction are assumed to be identified on the design documents. In this case, the verification methods to be used are also assumed to be specified.
(5) In case of high seismic action class (4.1.1(4)), formal quality system plans, covering design, construction, and use, additional to the control procedures prescribed in the other relevant Eurocodes, are assumed to be specified.
Eurocode 8 - Auslegung von Bauwerken gegen Erdbeben - Teil 1-1: Grundlagen und Erdbebeneinwirkung
1.1 Anwendungsbereich von prEN 1998 1 1
(1) Dieses Dokument gilt für die Bemessung und den Nachweis von Hochbauten und anderen Bauwerken in Erdbebengebieten. Es enthält allgemeine Regeln, die für alle Bauwerksarten, mit Ausnahme von Spezialbauwerken, maßgebend sind.
ANMERKUNG Spezialbauwerke gehören der Versagensfolgeklasse CC4 an, die von den Eurocodes nicht vollständig abgedeckt wird. Die Bauwerkskategorien der Versagensfolgeklasse CC4, für die EN 1998 oder Teile davon in einem Land gelten, können von den zuständigen Behörden angegeben oder im Nationalen Anhang enthalten sein.
(2) Dieses Dokument enthält die grundlegenden Leistungsanforderungen und die Übereinstimmungskriterien, die für Hoch- und Ingenieurbauten in Erdbebengebieten gelten.
(3) Dieses Dokument enthält Regeln für die Darstellung von Erdbebeneinwirkungen und die Beschreibung von Bemessungssituationen mit Erdbebeneinwirkungen. Für bestimmte Tragwerksarten, die in anderen Teilen von EN 1998 behandelt werden, sind ergänzende Regeln erforderlich, die in diesen einschlägigen Teilen enthalten sind.
(4) Dieses Dokument enthält allgemeine Verfahren für die statische Berechnung und den Nachweis unter Erdbebeneinwirkungen, einschließlich schwingungsisolierter Bauwerke und dissipativer dezentraler Anlagen.
(5) Dieses Dokument enthält Regeln für die Modellierung und den Nachweis von Bruchfestigkeiten und Bruchverformungen.
1.2 Voraussetzungen
(1) Die allgemeinen Voraussetzungen von prEN 1990:2021, 1.2, werden durch (2) bis (6) ergänzt.
(2) Es wird vorausgesetzt, dass die Bemessung des Tragwerks und der vom Tragwerk getragenen Massen weder in der Bauphase noch während seiner Lebensdauer geändert wird, es sei denn, es wird eine geeignete Begründung und ein ebensolcher Nachweis geliefert. Dies gilt auch für nichttragende Bauteile (siehe 3.1.2). Wegen der besonderen Art der Erdbebenantwort gilt dies sogar im Fall von Änderungen, die eine Erhöhung des Tragwiderstands bewirken.
(3) Es wird vorausgesetzt, dass die Bauunterlagen die Abmessungen, die Einzelheiten und die Eigenschaften der für tragende Bauteile verwendeten Werkstoffe enthalten. Gegebenenfalls wird auch vorausgesetzt, dass die Bauunterlagen die Eigenschaften von anzuwendenden besonderen Vorrichtungen und die Abstände zwischen tragenden und nichttragenden Bauteilen enthalten. Es wird vorausgesetzt, dass die für die Güteüberwachung erforderlichen Vorschriften festgelegt sind.
(4) Es wird vorausgesetzt, dass Bauteile von besonderer Bedeutung für das Tragverhalten, bei denen eine besondere Überprüfung während der Bauausführung notwendig ist, auf den Bauzeichnungen ausgewiesen sind. In diesem Fall wird auch vorausgesetzt, dass die anzuwendenden Nachweisverfahren festgelegt sind.
(5) Im Fall einer Klasse mit hohen Erdbebeneinwirkungen (4.1.1(4)) wird vorausgesetzt, dass formale Qualitätssicherungssysteme für die Bemessung, die Bauausführung und die Nutzung zusätzlich zu den in den anderen einschlägigen Eurocodes vorgeschriebenen Kontrollverfahren festgelegt sind.
Eurocode 8 - Calcul des structures pour leur résistance aux séismes - Partie 1-1 : Règles générales et action sismique
1.1 Domaine d'application du prEN 1998-1-1
(1) Le présent document s'applique au dimensionnement et à la vérification des bâtiments et autres structures dans les régions sismiques. Il énonce des règles générales applicables à tous les types de structures, à l'exception des structures spéciales.
NOTE Les structures spéciales appartiennent à la classe de conséquence CC4, qui n'est pas entièrement couverte par les Eurocodes. Les catégories de structures de la classe de conséquences CC4 pour lesquelles l'EN 1998, ou des parties de celle-ci, s'applique dans un pays peuvent être fournies par les autorités compétentes ou figurent dans l'Annexe Nationale.
(2) Le présent document contient les exigences de performance de base et les critères de conformité applicables aux bâtiments et aux ouvrages de génie civil en région sismique.
(3) Le présent document donne des règles pour la représentation des actions sismiques et la description des situations sismiques de calcul. Certains types de structure, abordées d'autres parties de l'EN 1998, nécessitent des règles complémentaires qui sont données dans ces parties.
(4) Le présent document contient des méthodes générales pour l'analyse et la vérification des structures soumises à des actions sismiques, y compris les structures sur appuis parasismiques et les structures avec des systèmes dissipatifs distribués.
(5) Le présent document 1 contient des règles pour la modélisation et la vérification des résistances ultimes et des déformations.
1.2 Hypothèses
(1) Les hypothèses générales du prEN 1990:2021, 1.2, sont complétées comme indiqué dans les points (2) à (6).
(2) Il est supposé que, par rapport aux hypothèses de conception, aucune modification de la structure et de la masse portée ne sera effectuée pendant la phase de construction ou pendant la durée de vie de la structure, à moins qu'elle ne soit correctement justifiée et vérifiée. Ceci s'applique également aux éléments connexes (voir 3.1.2). En raison de la nature spécifique de la réponse sismique, ceci s'applique également aux modifications entraînant un renforcement de la résistance de la structure.
(3) Les documents de conception sont censés indiquer les dimensions, les dispositions constructives et les propriétés des matériaux constitutifs des éléments structuraux. Ces documents sont également censés indiquer les propriétés des dispositifs spéciaux utilisés s'il y en a, et les distances entre les éléments structuraux et connexes. Les dispositions relatives à la maîtrise de la qualité sont également censées être données.
(4) Les éléments d'importance structurale particulière, nécessitant des vérifications spéciales durant la mise en œuvre, sont censés être identifiés sur les documents de conception. Dans ces cas, les méthodes de vérification à utiliser sont censées également être spécifiées.
(5) Dans le cas d'une classe d'action sismique élevée (4.1.1(4)), des plans de système qualité formels, couvrant le dimensionnement, l'exécution et l'utilisation, sont censés être spécifiés, en complément des procédures de contrôle prescrites dans les autres Eurocodes.
Evrokod 8 - Projektiranje potresnoodpornih konstrukcij - 1-1. del: Splošna pravila in potresni vpliv
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 1998-1-1:2022
01-december-2022
Evrokod 8 - Projektiranje potresnoodpornih konstrukcij - 1-1. del: Splošna pravila
in potresni vpliv
Eurocode 8 - Design of structures for earthquake resistance - Part 1-1: General rules
and seismic action
Eurocode 8 - Auslegung von Bauwerken gegen Erdbeben - Teil 1-1: Grundlagen und
Erdbebeneinwirkung
Eurocode 8 - Calcul des structures pour leur résistance aux séismes - Partie 1-1 :
Règles générales et action sismique
Ta slovenski standard je istoveten z: prEN 1998-1-1
ICS:
91.010.30 Tehnični vidiki Technical aspects
91.120.25 Zaščita pred potresi in Seismic and vibration
vibracijami protection
oSIST prEN 1998-1-1:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 1998-1-1:2022
DRAFT
EUROPEAN STANDARD
prEN 1998-1-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2022
ICS 91.010.30; 91.120.25 Will supersede EN 1998-1:2004
English Version
Eurocode 8 - Design of structures for earthquake
resistance - Part 1-1: General rules and seismic action
Eurocode 8 - Calcul des structures pour leur résistance Eurocode 8 - Auslegung von Bauwerken gegen
aux séismes - Partie 1-1 : Règles générales et action Erdbeben - Teil 1-1: Grundlagen und
sismique Erdbebeneinwirkung
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 250.
If this draft becomes a European Standard, CEN 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.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1998-1-1:2022 E
worldwide for CEN national Members.
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Contents Page
European foreword . 5
0 Introduction . 6
1 Scope . 9
1.1 Scope of prEN 1998-1-1 . 9
1.2 Assumptions . 9
2 Normative references . 10
3 Terms, definitions and symbols . 10
3.1 Terms and definitions . 10
3.2 Symbols and abbreviations . 15
3.2.1 Symbols . 15
3.2.2 Abbreviations . 27
3.3 S.I. Units . 28
4 Basis of design . 29
4.1 Performance requirements . 29
4.2 Consequence classes . 30
4.3 Limit states and associated seismic action . 30
4.4 Primary and secondary members . 31
4.5 Compliance criteria for new structures . 32
4.5.1 General. 32
4.5.2 Design verification principles . 32
5 Site conditions and seismic action . 33
5.1 Site conditions . 33
5.1.1 General. 33
5.1.2 Site categorization . 33
5.2 Seismic action . 35
5.2.1 Spectral acceleration maps . 35
5.2.2 Basic representation of the seismic action . 36
5.2.3 Alternative representations of the seismic action . 43
6 Modelling, analysis and verification . 44
6.1 General. 44
6.2 Modelling . 45
6.2.1 General. 45
6.2.2 Additional modelling rules for linear analysis . 45
6.2.3 Additional modelling rules for non-linear analysis . 46
6.3 Seismic action . 46
6.4 Force-based approach . 46
6.4.1 Reduced spectrum for the force-based approach . 46
6.4.2 Lateral force method . 48
6.4.3 Response spectrum method . 49
6.4.4 Combination of the effects of the components of the seismic action . 50
6.5 Non-linear static analysis. 51
6.5.1 General. 51
6.5.2 Lateral loads and capacity curve . 51
6.5.3 Equivalent SDOF system . 52
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6.5.4 Target displacement . 54
6.6 Response-history analysis . 55
6.7 Verification to limit states . 55
6.7.1 General . 55
6.7.2 Verifications to Significant Damage limit state. 56
6.7.3 Verifications to additional limit states . 57
6.8 Structures equipped with antiseismic devices . 58
6.8.1 Scope . 58
6.8.2 Basis of design for structures equipped with antiseismic devices . 58
6.8.3 Seismic action . 61
6.8.4 Modelling . 62
6.8.5 Analysis of structures equipped with antiseismic devices . 63
6.8.6 Verifications of antiseismic devices to limit states . 65
7 Deformation criteria and strength models . 66
7.1 General . 66
7.2 Reinforced concrete structures . 68
7.2.1 General . 68
7.2.2 Deformation criteria . 68
7.2.3 Resistance to shear . 73
7.2.4 Resistance of beam-column joints . 74
7.3 Steel and composite steel-concrete structures . 78
7.3.1 General . 78
7.3.2 Beams and columns under flexure with or without axial load . 80
7.3.3 Steel bracings . 85
7.3.4 Beam-to-column web panel joint . 88
7.3.5 Links in frames with eccentric bracings . 89
7.3.6 Buckling restrained bracings . 91
7.4 Timber structures . 91
Annex A (informative) European hazard maps . 93
A.1 Use of this annex . 93
A.2 Scope . 93
Annex B (normative) Alternative identification of site categories . 96
B.1 Use of this normative annex . 96
B.2 Scope and field of application . 96
B.3 Simplified identification of site categories . 96
B.4 Case of incomplete quantitative information for identification of site categories . 97
B.4.1 Missing direct measurements of v or values available only to a limited depth . 97
s
B.4.2 Missing quantitative information on H . 97
800
Annex C (normative) Site-specific elastic response spectra . 99
C.1 Use of this annex . 99
C.2 Scope and field of application . 99
C.3 Site-specific elastic response spectra based on a local seismic hazard analysis . 99
C.4 Site-specific elastic response spectra based on evaluation of local seismic wave
amplification effects . 99
C.5 Limitations on site-specific spectral values . 100
Annex D (normative) Criteria for selection and scaling of input motions . 101
D.1 Use of this annex . 101
D.2 Scope and field of application . 101
D.3 Recorded accelerograms . 101
D.4 Multiple input motions using recorded accelerograms . 102
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D.5 Simulated accelerograms . 103
D.6 Artificial accelerograms . 103
Annex E (normative) Determination of target displacement and limit-state spectral
acceleration by using non-linear response-history analyses of an equivalent SDOF
model . 104
E.1 Use of this annex . 104
E.2 Scope and field of application . 104
E.3 Definition of a multi-linear equivalent SDOF model . 104
E.4 Determination of the target displacement through non-linear response-history
analyses . 106
E.5 Determination of the limit-state spectral acceleration through non-linear response-
history analyses . 106
Annex F (informative) Simplified reliability-based verification format . 107
F.1 Use of this annex . 107
F.2 Scope . 107
F.3 Reliability-based verification . 107
Annex G (normative) Design of fastenings to concrete in the seismic design situation . 110
G.1 Use of this annex . 110
G.2 Scope and field of application . 110
G.3 Basis of design . 111
G.4 Resistance . 115
G.5 Displacement of fasteners . 117
Annex M (normative) Material or product properties in EN 1998-1-1 . 118
M.1 Use of this annex . 118
M.2 Scope and field of application . 118
Bibliography . 119
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European foreword
This document (prEN 1998-1-1:2022) has been prepared by Technical Committee CEN/TC 250
“Structural Eurocodes”, the secretariat of which is held by BSI. CEN/TC 250 is responsible for all
Structural Eurocodes and has been assigned responsibility for structural and geotechnical design
matters by CEN.
This document will supersede EN 1998-1:2004.
The first generation of EN Eurocodes was published between 2002 and 2007. This document forms part
of the second generation of the Eurocodes, which have been prepared under Mandate M/515 issued to
CEN by the European Commission and the European Free Trade Association.
The Eurocodes have been drafted to be used in conjunction with relevant execution, material, product
and test standards, and to identify requirements for execution, materials, products and testing that are
relied upon by the Eurocodes.
The Eurocodes recognize the responsibility of each Member State and have safeguarded their right to
determine values related to regulatory safety matters at national level through the use of National
Annexes.
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0 Introduction
0.1 Introduction to the Eurocodes
The Structural Eurocodes comprise the following standards generally consisting of a number of Parts:
— EN 1990 Eurocode: Basis of structural and geotechnical design
— EN 1991 Eurocode 1: Actions on structures
— EN 1992 Eurocode 2: Design of concrete structures
— EN 1993 Eurocode 3: Design of steel structures
— EN 1994 Eurocode 4: Design of composite steel and concrete structures
— EN 1995 Eurocode 5: Design of timber structures
— EN 1996 Eurocode 6: Design of masonry structures
— EN 1997 Eurocode 7: Geotechnical design
— EN 1998 Eurocode 8: Design of structures for earthquake resistance
— EN 1999 Eurocode 9: Design of aluminium structures
— New parts are under development, e.g. Eurocode for design of structural glass
The Eurocodes are intended for use by designers, clients, manufacturers, constructors, relevant
authorities (in exercising their duties in accordance with national or international regulations),
educators, software developers, and committees drafting standards for related product, testing and
execution standards.
NOTE Some aspects of design are most appropriately specified by relevant authorities or, where not specified,
can be agreed on a project-specific basis between relevant parties such as designers and clients. The Eurocodes
identify such aspects making explicit reference to relevant authorities and relevant parties.
0.2 Introduction to EN 1998 Eurocode 8
The scope of EN 1998 is to define the rules for the seismic design of new buildings and engineering
works and the assessment and retrofit of existing ones, including geotechnical aspects, as well as
temporary structures.
NOTE This standard also covers the verification of structures in the seismic situation during construction,
when required.
Attention should be paid to the fact that, for the design of structures in seismic regions, the provisions
of EN 1998 should be applied in addition to the relevant provisions of EN 1990 to EN 1997 and
EN 1999. In particular, EN 1998 should be applied to structures of consequence classes CC1, CC2 and
CC3, as defined in prEN 1990:2021, 4.3. Structures of consequence class CC4 are not fully covered by
the Eurocodes but may be required to follow EN 1998, or parts of it, by the relevant Authorities.
By nature, perfect protection (a null seismic risk) against earthquakes is not feasible in practice, in
particular because the knowledge of the hazard itself is characterized by a significant uncertainty.
Therefore, in Eurocode 8, the seismic action is represented in a conventional form, proportional in
amplitude to earthquakes likely to occur at a given location and representative of their frequency
content. This representation is not the prediction of a particular seismic movement, and such a
movement could give rise to more severe effects than those of the seismic action considered, inflicting
damage greater than the one described by the Limit States contemplated in this Standard.
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Not only the seismic action cannot be predicted but, in addition, it should be recognized that
engineering methods are not perfectly predictive when considering the effects of this specific action,
under which structures are assumed to respond in the non-linear regime. Such uncertainties are taken
into account according to the general framework of EN 1990, with a residual risk of underestimation of
their effects.
Further Parts of EN 1998 include, in addition to prEN 1998-1-1, the following:
— prEN 1998-1-2 contains specific provisions relevant to buildings;
— EN 1998-2 contains specific provisions relevant to bridges;
— EN 1998-3 contains provisions for the seismic assessment and retrofitting of existing buildings and
bridges;
— EN 1998-4 contains specific provisions relevant to silos, tanks, pipelines, towers, masts and
chimneys;
— EN 1998-5 contains specific provisions relevant to foundations, retaining structures and
geotechnical aspects.
0.3 Introduction to prEN 1998-1-1
prEN 1998-1-1 contains general requirements for all types of structures for earthquake resistant
design, including definition of the seismic action and the description of the methods of analysis and
verification, in general terms.
Nevertheless, the definition of the seismic action allows adaptation to a local specific seismic context
through Nationally Determined Parameters (NDP) defined by the National Authorities or in the
National Annex or through a site-specific description.
prEN 1998-1-1 is subdivided in seven clauses and includes the following annexes, where Annexes B to E
and G are normative and Annexes A and F are informative:
— Annex A: European hazard maps;
— Annex B: Alternative identification of site categories;
— Annex C: Site-specific elastic response spectra;
— Annex D: Criteria for selection and scaling of input motions;
— Annex E: Determination of target displacement and limit-state spectral acceleration by using a non-
linear response-history analysis of an equivalent SDOF model;
— Annex F: Simplified reliability-based verification format;
— Annex G: Design of fastenings to concrete in the seismic design situation.
0.4 Verbal forms used in the Eurocodes
The verb “shall” expresses a requirement strictly to be followed and from which no deviation is
permitted in order to comply with the Eurocodes.
The verb “should” expresses a highly recommended choice or course of action. Subject to national
regulation and/or any relevant contractual provisions, alternative approaches could be used/adopted
where technically justified.
The verb “may" expresses a course of action permissible within the limits of the Eurocodes.
The verb “can" expresses possibility and capability; it is used for statements of fact and clarification of
concepts.
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0.5 National annex for prEN 1998-1-1
National choice is allowed in this document where explicitly stated within notes. National choice
includes the selection of values for Nationally Determined Parameters (NDPs).
The national standard implementing prEN 1998-1-1 can have a National Annex containing all national
choices to be used for the design of buildings and civil engineering works to be constructed in the
relevant country.
When no national choice is given, the default choice given in this document is to be used.
When no national choice is made and no default is given in this document, the choice can be specified by
a relevant authority or, where not specified, agreed for a specific project by appropriate parties.
National choice is allowed in prEN 1998-1-1 through notes to the following:
1.1(1) 4.1(6) 4.1(8) 4.5.1(2)
5.2.1(1) 5.2.1(3) 5.2.
...
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