oSIST prEN 1998-5:2022
(Main)Eurocode 8 - Design of structures for earthquake resistance - Part 5: Geotechnical aspects, foundations, retaining and underground structures
Eurocode 8 - Design of structures for earthquake resistance - Part 5: Geotechnical aspects, foundations, retaining and underground structures
1.1 Scope of prEN 1998-5
(1) This document establishes general principles for the design and assessment of geotechnical systems in seismic regions. It gives general rules relevant to all families of geotechnical structures, to the design of foundations, retaining structures and underground structures and complements EN 1997-3 for the seismic design situation.
(2) This document contains the basic performance requirements and compliance criteria applicable to geotechnical structures and geotechnical systems in seismic regions.
(3) This document refers to the rules for the representation of seismic actions and the description of the seismic design situations defined in EN 1998-1-1 and provides specific definition of the seismic action applicable to geotechnical structures.
1.2 Assumptions
(1) The general assumptions of prEN 1990:2021, 1.2, are assumed to be applied.
(2) The provisions of this Standard assume that the parties of the project in charge of the analyses, for assessment and possible design of the retrofitting of existing geotechnical structures, have appropriate experience of the type of structures being strengthened or repaired.
Eurocode 8 - Auslegung von Bauwerken gegen Erdbeben - Teil 5: Geotechnische Aspekte, Gründungen, Stütz- und Untertagebauwerke
1.1 Anwendungsbereich von prEN 1998-5
(1) Dieses Dokument legt die allgemeinen Grundsätze für die Auslegung und Beurteilung von geotechnischen Systemen in Erdbebengebieten fest. Sie enthält allgemeine Regeln, die für alle Arten von geotechnischen Bauwerken, für die Auslegung von Gründungen, Stütz- und Untertagebauwerke relevant sind, und sollte in Ergänzung zu EN 1997-3 für die Bemessungssituation mit Erdbeben verwendet werden.
(2) Dieses Dokument enthält die grundlegenden Leistungsanforderungen und Konformitätskriterien, die für geotechnische Bauwerke und geotechnische Systeme in Erdbebengebieten gelten.
(3) Dieses Dokument bezieht sich auf die Regeln für die Darstellung von Erdbebeneinwirkungen und die Beschreibung der in EN 1998-1-1 definierten Bemessungssituationen mit Erdbeben und enthält eine spezifische Definition der für geotechnische Bauwerke geltenden Erdbebeneinwirkung.
1.2 Voraussetzungen
(1) Es wird davon ausgegangen, dass die allgemeinen Voraussetzungen nach prEN 1990:2021, 1.2, gelten.
(2) Die Vorschriften dieser Norm gehen davon aus, dass die Projektbeteiligten, die für die Berechnungen, für die Beurteilung und mögliche Bemessung der Modernisierung bestehender geotechnischer Bauwerke verantwortlich sind, über geeignete Erfahrung mit der Art der zu verstärkenden oder instandzusetzenden Bauwerke verfügen.
Eurocode 8 - Calcul des structures pour leur résistance aux séismes - Partie 5 : Aspects géotechniques, fondations, ouvrages de soutènement et structures souterraines
1.1 Domaine d'application du prEN 1998-5
(1) Le présent document établit les principes généraux pour le dimensionnement et l'évaluation des systèmes géotechniques dans les régions sismiques. Il fournit des règles générales pertinentes pour toutes les familles de structures géotechniques, pour le calcul des fondations, des ouvrages de soutènement et des structures souterraines, en complément de l'EN 1997-3 pour la situation sismique de calcul.
(2) Le présent document contient les exigences de performance de base et les critères de conformité applicables aux structures et aux systèmes géotechniques en zone sismique.
(3) Le présent document fait référence aux règles de représentation des actions sismiques et de description des situations sismiques de calcul définies dans l'EN 1998-1-1, et il fournit une définition spécifique de l'action sismique applicable aux structures géotechniques.
1.2 Hypothèses
(1) Les hypothèses de travail générales du prEN 1990:2021, 1.2 sont supposées s'appliquer.
(2) La présente norme prend pour acquis que les intervenants du projet en charge des analyses, pour l'évaluation et l'éventuelle conception des rénovations de structures géotechniques existantes, disposent d'une expérience appropriée du type de structures à renforcer ou à réparer.
Evrokod 8 - Projektiranje potresnoodpornih konstrukcij - 5. del: Geotehnični vidiki, temelji, oporne in podzemne konstrukcije
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 1998-5:2022
01-december-2022
Evrokod 8 - Projektiranje potresnoodpornih konstrukcij - 5. del: Geotehnični vidiki,
temelji, oporne in podzemne konstrukcije
Eurocode 8 - Design of structures for earthquake resistance - Part 5: Geotechnical
aspects, foundations, retaining and underground structures
Eurocode 8 - Auslegung von Bauwerken gegen Erdbeben - Teil 5: Geotechnische
Aspekte, Gründungen, Stütz- und Untertagebauwerke
Eurocode 8 - Calcul des structures pour leur résistance aux séismes - Partie 5 : Aspects
géotechniques, fondations, ouvrages de soutènement et structures souterraines
Ta slovenski standard je istoveten z: prEN 1998-5
ICS:
91.010.30 Tehnični vidiki Technical aspects
91.120.25 Zaščita pred potresi in Seismic and vibration
vibracijami protection
oSIST prEN 1998-5:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 1998-5:2022
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oSIST prEN 1998-5:2022
DRAFT
EUROPEAN STANDARD
prEN 1998-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2022
ICS 91.010.30; 91.120.25 Will supersede EN 1998-5:2004
English Version
Eurocode 8 - Design of structures for earthquake
resistance - Part 5: Geotechnical aspects, foundations,
retaining and underground structures
Eurocode 8 - Calcul des structures pour leur résistance Eurocode 8 - Auslegung von Bauwerken gegen
aux séismes - Partie 5 : Aspects géotechniques, Erdbeben - Teil 5: Geotechnische Aspekte,
fondations, ouvrages de soutènement et structures Gründungen, Stütz- und Untertagebauwerke
souterraines
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, Türkiye 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 NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
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 1998-5:2022 E
worldwide for CEN national Members.
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prEN 1998-5:2022 (E)
Contents Page
European foreword . 6
0 Introduction . 7
1 Scope . 9
1.1 Scope of prEN 1998-5 . 9
1.2 Assumptions . 9
2 Normative references . 9
3 Terms, definitions and symbols . 10
3.1 Terms and definitions . 10
3.1.1 General. 10
3.2 Symbols and abbreviations . 12
3.2.1 General. 12
3.2.2 Symbols . 13
3.2.3 Abbreviations . 19
3.3 S.I. Units . 20
4 Basis of design . 20
4.1 Performance requirements . 20
4.2 Consequence classes . 20
4.3 Limit states and associated seismic action . 21
4.4 Compliance criteria . 22
4.5 Methods of analysis . 22
4.6 Verification of seismic performance . 23
5 Seismic action . 24
5.1 Definition of the seismic action . 24
5.2 Seismic action for geotechnical systems and geotechnical structures . 24
6 Ground properties . 25
6.1 Ground investigations . 25
6.2 Water levels . 25
6.3 Strength parameters . 25
6.4 Stiffness and energy dissipation properties . 26
6.5 Partial factors and design cases . 27
7 Evaluation of the seismic response of the construction site . 28
7.1 Siting . 28
7.1.1 General. 28
7.1.2 Potentially active seismic faults . 28
7.2 Slope stability . 29
7.2.1 General. 29
7.2.2 Methods of analysis . 29
7.3 Potentially liquefiable soils . 31
7.3.1 General. 31
7.3.2 Consideration of site conditions . 31
7.3.3 Evaluation of cyclic resistance ratio (CRR) . 32
7.3.4 Evaluation of cyclic stress ratio (CSR) . 33
7.3.5 Liquefaction assessment . 33
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7.3.6 Liquefaction remediation . 34
7.4 Settlements of soils under cyclic loading . 34
7.5 Site-specific response analyses . 35
7.5.1 General . 35
7.5.2 Ground response analysis . 35
8 Soil-structure interaction . 35
8.1 General . 35
8.2 Analysis of inertial effects . 37
8.2.1 General . 37
8.2.2 Force-based approach. 37
8.2.3 Displacement-based approach . 38
8.3 Modelling of kinematic effects . 39
8.4 Combination of inertial and kinematic effects for internal forces . 40
8.5 Simultaneous modelling of kinematic and inertial effects . 40
9 Foundation system . 40
9.1 General requirements . 40
9.2 Design values of the action effects . 41
9.3 Foundation horizontal connections . 42
9.4 Surface and shallow embedded foundations . 43
9.4.1 General . 43
9.4.2 Verifications . 43
9.4.3 Structural design. 46
9.5 Pile foundations . 47
9.5.1 General . 47
9.5.2 General design requirements. 47
9.5.3 Methods of analysis . 48
9.5.4 Design verifications . 49
9.5.5 Detailing and minimum reinforcement ratio for reinforced concrete piles . 51
10 Earth retaining structures . 52
10.1 General . 52
10.2 General design considerations . 52
10.3 Analysis and verification of performance. 53
10.3.1 General principles . 53
10.3.2 Earth pressures for active and passive limit states . 53
10.3.3 Calculation of the hydrodynamic pressures . 54
10.3.4 Verification of seismic performance . 55
10.3.5 Specific rules for displacing retaining structures . 55
10.3.6 Specific rules for gravity retaining walls . 56
10.3.7 Specific rules for retaining walls founded on piles . 57
10.3.8 Specific rules for anchored retaining walls . 57
10.3.9 Specific rules for non-displacing retaining systems . 57
10.3.10 Specific rules for bridge abutments . 58
11 Underground structures . 58
11.1 General . 58
11.2 Seismic actions . 59
11.2.1 General . 59
11.2.2 Ground motion parameters . 59
11.2.3 Ground motion parameters . 60
11.3 Methods of analysis . 60
11.3.1 Seismic action for underground structures . 60
11.3.2 Transient seismic action . 60
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11.3.3 Permanent ground deformation . 61
11.4 Seismic loading for large underground spaces . 62
11.4.1 Ground shaking . 62
11.4.2 Permanent ground displacements . 63
11.5 Culverts . 63
Annex A (informative) Reduction of the seismic action as an effect of wall height and
predominant wavelength . 65
A.1 Use of this annex . 65
A.2 Scope and field of application . 65
A.3 Simplified evaluation . 65
A.4 Use of site-specific ground response analyses . 66
Annex B (informative) Procedure for liquefaction analyses . 68
B.1 Use of this informative annex . 68
B.2 Scope and field of application . 68
B.3 General. 68
B.4 Assessment of liquefaction susceptibility . 68
B.5 In situ evaluation of CRR . 69
B.5.1 General. 69
B.5.2 SPT-based method . 69
B.5.3 CPT-based method . 71
B.6 Evaluation of the stress reduction factor . 72
B.7 Simplified liquefaction index. 73
Annex C (informative) Evaluation of settlements of coarse-grained soils . 74
C.1 Use of this annex . 74
C.2 Scope and field of application . 74
C.3 Free-field settlement . 74
C.4 Volumetric strain in saturated sands . 74
C.4.1 Method based on Factor of Safety (FS) against liquefaction . 74
C.4.2 Method based on SPT data . 75
C.4.3 Method based on CPT . 76
C.5 Volumetric strain in dry sand . 77
C.6 Settlement under a building . 78
C.7 Lateral spreading due to liquefaction . 80
Annex D (informative) Impedance functions for surface and deep foundations . 82
D.1 Use of this annex . 82
D.2 Scope and field of application . 82
D.3 Impedance of a rectangular foundation on a homogeneous half-space . 82
D.3.1 Stiffness coefficient . 82
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D.3.2 Dashpot coefficient . 83
D.4 Static impedance of embedded footings in a homogeneous half-space . 86
D.5 Static lateral impedance of a single pile in a homogeneous layer . 87
D.6 Static lateral impedance of a single pile in a linearly inhomogeneous layer . 88
D.7 Lateral impedance of a pile group . 89
Annex E (informative) Seismic bearing capacity of shallow foundations . 90
E.1 Use of this annex . 90
E.2 Scope and field of application . 90
E.3 Surface strip foundation . 90
E.4 Surface circular foundation on fine-grained soils . 92
E.5 Shallow embedded rectangular foundation on fine-grained soils . 92
E.6 Shallow embedded rectangular foundation on coarse-grained soils . 93
E.7 Use of a global safety factor on resistance . 93
Annex F (informative) Evaluation of earth pressures on retaining structures . 95
F.1 Use of this annex . 95
F.2 Scope and field of application . 95
F.3 Coefficients of active and passive earth pressure . 95
F.4 Earth pressure on non-displacing retaining structures . 96
Annex G (informative) Simplified evaluation of peak ground parameters for seismic design
of underground structures . 98
G.1 Use of this annex . 98
G.2 Scope and field of application . 98
G.3 Seismic action . 98
G.4 Effects of seismic action on underground structures . 99
G.5 Variability of ground motion . 99
Annex H (informative) Simplified analytical expressions for the seismic design of tunnels . 100
H.1 Use of this annex . 100
H.2 Scope and field of application . 100
H.3 Circular shape tunnels – Transverse response . 100
H.4 Rectangular shape tunnels – Transverse response . 103
H.5 Longitudinal response . 106
Annex I (informative) Impedance functions for underground structures . 110
I.1 Use of this annex . 110
I.2 Scope and field of application . 110
I.3 Transverse response . 110
I.4 Longitudinal response . 111
Bibliography . 113
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European foreword
This document (prEN 1998-5:2022) has been prepared by Technical Committee CEN/TC 250
“Structural Eurocodes”, the secretariat of which is held by BSI.
...
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