Eurocode - Basis of structural design

BS EN

BRITISH STANDARD 1990:2002

Eurocode — Basis of

structural design

BSI

©

Copy,

Uncontrolled

12/07/2004,

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BS EN 1990:2002 National foreword

This British Standard is the official English language version of EN 1990:2002

It supersedes DD ENV 1991-1:1996 which is withdrawn.

The UK participation in its preparation was entrusted by Technical Committee

B/525, Building and Civil engineering structures, to Subcommittee B/525/1,

Action, loadings and basis of design, which has the responsibility to:

— aid enquirers to understand the text;

— present to the responsible international/European committee any

enquiries on the interpretation, or proposals for change, and keep the

UK interests informed;

— monitor related international and European developments and

promulgate them in the UK.

Where a normative part of this EN allows for a choice to be made at the

national level, the range and possible choice will be given in the normative text,

BSI and a Note will qualify it as a Nationally Determined Parameter (NDP). NDPs

can be a specific value for a factor, a specific level or class, a particular method

or a particular application rule if several are proposed in the EN.

© To enable EN 1990 to be used in the UK, the NDPs will be published in a

Copy, National Annex which will be incorporated by amendment into this British

Standard in due course, after public consultation has taken place.

A list of organizations represented on this subcommittee can be obtained on

Uncontrolled request to its secretary.

Cross-references

The British Standards which implement international or European

publications referred to in this document may be found in the BSI Catalogue

under the section entitled “International Standards Correspondence Index”, or

by using the “Search” facility of the BSI Electronic Catalogue or of British

Standards Online.

This publication does not purport to include all the necessary provisions of a

12/07/2004, contract. Users are responsible for their correct application.

Compliance with a British Standard does not of itself confer immunity

from legal obligations.

PORTSMOUTH, This British Standard, having

been prepared under the Summary of pages

direction of the Building and This document comprises a front cover, an inside front cover, the EN title page,

Civil Engineering Sector Policy pages 2 to 87 and a back cover.

and Strategy Committee, was

published under the authority The BSI copyright date displayed in this document indicates when the

of the Standards Policy and document was last issued.

Strategy Committee on

27 July 2002

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Amd. No. Date Comments

© BSI 27 July 2002

Licensed ISBN 0 580 40186 3

EUROPEAN STANDARD EN 1990

NORME EUROPÉENNE

EUROPÄISCHE NORM April 2002

ICS 91.010.30 Supersedes ENV 1991-1:1994

English version

Eurocode - Basis of structural design

Eurocodes structuraux - Eurocodes: Bases de calcul des Eurocode: Grundlagen der Tragwerksplanung

structures

BSI This European Standard was approved by CEN on 29 November 2001.

© 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. Up-to-date lists and bibliographical references concerning such national

Copy, standards may be obtained on application to the Management Centre or to any CEN 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 CEN member into its own language and notified to the Management Centre has the same status as the official

Uncontrolled versions.

CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,

Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

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Licensed © 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1990:2002 E

worldwide for CEN national Members.

EN 1990:2002 (E)

Contents Page

FOREWORD.............................................................................................................................................. 5

B E ....................................................................................... 5

ACKGROUND OF THE UROCODE PROGRAMME

S E ................................................................................. 6

TATUS AND FIELD OF APPLICATION OF UROCODES

N S E ................................................................................ 7

ATIONAL TANDARDS IMPLEMENTING UROCODES

L E (EN ETA )

INKS BETWEEN UROCODES AND HARMONISED TECHNICAL SPECIFICATIONS S AND S FOR

................................................................................................................................................. 7

PRODUCTS

A EN 1990..................................................................................... 7

DDITIONAL INFORMATION SPECIFIC TO

N EN 1990 ............................................................................................................... 8

ATIONAL ANNEX FOR

SECTION 1 GENERAL ........................................................................................................................ 9

1.1 S ................................................................................................................................................. 9

COPE

1.2 N ................................................................................................................... 9

ORMATIVE REFERENCES

BSI 1.3 A ................................................................................................................................... 10

SSUMPTIONS

1.4 D P A R .......................................................... 10

ISTINCTION BETWEEN RINCIPLES AND PPLICATION ULES

1.5 T ................................................................................................................... 11

ERMS AND DEFINITIONS

© 1.5.1 Common terms used in EN 1990 to EN 1999............................................................................ 11

Copy, 1.5.2 Special terms relating to design in general............................................................................... 12

1.5.3 Terms relating to actions........................................................................................................... 15

1.5.4 Terms relating to material and product properties................................................................... 18

1.5.5 Terms relating to geometrical data ........................................................................................... 18

Uncontrolled 1.5.6 Terms relating to structural analysis ........................................................................................ 19

1.6 S .......................................................................................................................................... 20

YMBOLS

SECTION 2 REQUIREMENTS ......................................................................................................... 23

...................................................................................................................... 23

2.1 B ASIC REQUIREMENTS

2.2 R .............................................................................................................. 24

ELIABILITY MANAGEMENT

2.3 D ...................................................................................................................... 25

ESIGN WORKING LIFE

2.4 D ...................................................................................................................................... 25

URABILITY

12/07/2004, 2.5 Q .................................................................................................................... 26

UALITY MANAGEMENT

SECTION 3 PRINCIPLES OF LIMIT STATES DESIGN .............................................................. 27

.......................................................................................................................................... 27

3.1 G ENERAL

3.2 D .......................................................................................................................... 27

ESIGN SITUATIONS

3.3 U ................................................................................................................... 28

LTIMATE LIMIT STATES

3.4 S .......................................................................................................... 28

ERVICEABILITY LIMIT STATES

PORTSMOUTH, 3.5 L .......................................................................................................................... 29

IMIT STATE DESIGN

SECTION 4 BASIC VARIABLES...................................................................................................... 30

.................................................................................... 30

4.1 A

CTIONS AND ENVIRONMENTAL INFLUENCES

4.1.1 Classification of actions ............................................................................................................ 30

4.1.2 Characteristic values of actions ................................................................................................ 30

4.1.3 Other representative values of variable actions........................................................................ 32

OF 4.1.4 Representation of fatigue actions.............................................................................................. 32

4.1.5 Representation of dynamic actions ........................................................................................... 32

copy:UNIVERSITY 4.1.6 Geotechnical actions................................................................................................................. 33

4.1.7 Environmental influences.......................................................................................................... 33

4.2 M .............................................................................................. 33

ATERIAL AND PRODUCT PROPERTIES

4.3 G ......................................................................................................................... 34

EOMETRICAL DATA

SECTION 5 STRUCTURAL ANALYSIS AND DESIGN ASSISTED BY TESTING................... 35

.................................................................................................................... 35

5.1 S

TRUCTURAL ANALYSIS

5.1.1 Structural modelling.................................................................................................................. 35

5.1.2 Static actions ............................................................................................................................. 35

5.1.3 Dynamic actions........................................................................................................................ 35

Licensed 2 EN 1990:2002 (E)

5.1.4 Fire design ................................................................................................................................ 36

........................................................................................................... 37

5.2 D ESIGN ASSISTED BY TESTING

SECTION 6 VERIFICATION BY THE PARTIAL FACTOR METHOD..................................... 38

6.1 G .......................................................................................................................................... 38

ENERAL

6.2 L ..................................................................................................................................... 38

IMITATIONS

6.3 D ................................................................................................................................ 38

ESIGN VALUES

6.3.1 Design values of actions............................................................................................................ 38

6.3.2 Design values of the effects of actions....................................................................................... 39

6.3.3 Design values of material or product properties ...................................................................... 40

6.3.4 Design values of geometrical data ............................................................................................ 40

6.3.5 Design resistance ...................................................................................................................... 41

6.4 U ................................................................................................................... 42

LTIMATE LIMIT STATES

6.4.1 General...................................................................................................................................... 42

6.4.2 Verifications of static equilibrium and resistance..................................................................... 43

6.4.3 Combination of actions (fatigue verifications excluded)........................................................... 43

6.4.3.1 General ................................................................................................................................................43

BSI 6.4.3.2 Combinations of actions for persistent or transient design situations (fundamental combinations) ....44

6.4.3.3 Combinations of actions for accidental design situations....................................................................45

6.4.3.4 Combinations of actions for seismic design situations ........................................................................45

© 6.4.4 Partial factors for actions and combinations of actions ........................................................... 45

Copy, 6.4.5 Partial factors for materials and products................................................................................ 46

.......................................................................................................... 46

6.5 S

ERVICEABILITY LIMIT STATES

6.5.1 Verifications .............................................................................................................................. 46

6.5.2 Serviceability criteria................................................................................................................ 46

Uncontrolled 6.5.3 Combination of actions ............................................................................................................. 46

6.5.4 Partial factors for materials...................................................................................................... 47

(NORMATIVE)

ANNEX A1 APPLICATION FOR BUILDINGS ....................................................... 48

A1.1 F ................................................................................................................... 48

IELD OF APPLICATION

A1.2 C ........................................................................................................... 48

OMBINATIONS OF ACTIONS

A1.2.1 General ................................................................................................................................... 48

A1.2.2 Values of factors ................................................................................................................. 48

12/07/2004, ................................................................................................................. 49

A1.3 U LTIMATE LIMIT STATES

A1.3.1 Design values of actions in persistent and transient design situations................................... 49

A1.3.2 Design values of actions in the accidental and seismic design situations .............................. 53

....................................................................................................... 54

A1.4 S

ERVICEABILITY LIMIT STATES

A1.4.1 Partial factors for actions....................................................................................................... 54

A1.4.2 Serviceability criteria ............................................................................................................. 54

A1.4.3 Deformations and horizontal displacements .......................................................................... 54

PORTSMOUTH, A1.4.4 Vibrations ............................................................................................................................... 56

(INFORMATIVE)

ANNEX B MANAGEMENT OF STRUCTURAL RELIABILITY FOR

CONSTRUCTION WORKS ................................................................................................................... 57

.................................................................................................... 57

B1 S COPE AND FIELD OF APPLICATION

B2 S .......................................................................................................................................... 57

YMBOLS

B3 R .......................................................................................................... 58

ELIABILITY DIFFERENTIATION

OF B3.1 Consequences classes ................................................................................................................ 58

B3.2 Differentiation by values ........................................................................................................ 58

copy:UNIVERSITY B3.3 Differentiation by measures relating to the partial factors ....................................................... 59

............................................................................................ 59

B4 D ESIGN SUPERVISION DIFFERENTIATION

B5 I ....................................................................................................... 60

NSPECTION DURING EXECUTION

B6 P ............................................................................... 61

ARTIAL FACTORS FOR RESISTANCE PROPERTIES

(INFORMATIVE)

ANNEX C BASIS FOR PARTIAL FA