Eurocode 0 - prEN 1990 (ENG).pdf
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prEN 1990 - 51_e_stf
EUROPEAN STANDARD
FINAL DRAFT
prEN 1990
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2001
ICS 91.010.30
Will supersede ENV 1991-1:1994
English version
Eurocode - Basis of structural design
This draft European Standard is submitted to CEN members for formal vote. 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 Management Centre has the same
status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
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
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved
worldwide for CEN national Members.
Ref. No. prEN 1990:2001 E
Page 2
prEN 1990:2001
Contents
Page
FOREWORD.............................................................................................................................................. 5
B
ACKGROUND OF THE
E
UROCODE PROGRAMME
....................................................................................... 5
S
TATUS AND FIELD OF APPLICATION OF
E
UROCODES
................................................................................. 6
N
ATIONAL
S
TANDARDS IMPLEMENTING
E
UROCODES
................................................................................ 7
L
INKS BETWEEN
E
UROCODES AND HARMONISED TECHNICAL SPECIFICATIONS
(EN
S AND
ETA
S
)
FOR
PRODUCTS
................................................................................................................................................. 7
A
DDITIONAL INFORMATION SPECIFIC TO
EN 1990..................................................................................... 7
N
ATIONAL ANNEX FOR
EN 1990 ............................................................................................................... 8
SECTION 1 GENERAL ........................................................................................................................ 9
1.1 S
COPE
................................................................................................................................................. 9
1.2 N
ORMATIVE REFERENCES
................................................................................................................... 9
1.3 A
SSUMPTIONS
................................................................................................................................... 10
1.4 D
ISTINCTION BETWEEN
P
RINCIPLES AND
A
PPLICATION
R
ULES
.......................................................... 10
1.5 T
ERMS AND DEFINITIONS
................................................................................................................... 11
1.5.1 Common terms used in EN 1990 to EN 1999 ............................................................................ 11
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 ........................................................................................... 19
1.5.6 Terms relating to structural analysis ........................................................................................ 19
1.6
S
YMBOLS
.......................................................................................................................................... 21
SECTION 2 REQUIREMENTS ......................................................................................................... 24
2.1 B
ASIC REQUIREMENTS
...................................................................................................................... 24
2.2 R
ELIABILITY MANAGEMENT
.............................................................................................................. 25
2.3 D
ESIGN WORKING LIFE
...................................................................................................................... 26
2.4 D
URABILITY
...................................................................................................................................... 26
2.5 Q
UALITY MANAGEMENT
.................................................................................................................... 27
SECTION 3 PRINCIPLES OF LIMIT STATES DESIGN .............................................................. 28
3.1 G
ENERAL
.......................................................................................................................................... 28
3.2 D
ESIGN SITUATIONS
.......................................................................................................................... 28
3.3 U
LTIMATE LIMIT STATES
................................................................................................................... 29
3.4 S
ERVICEABILITY LIMIT STATES
.......................................................................................................... 29
3.5 L
IMIT STATE DESIGN
.......................................................................................................................... 30
SECTION 4 BASIC VARIABLES...................................................................................................... 31
4.1 A
CTIONS AND ENVIRONMENTAL INFLUENCES
.................................................................................... 31
4.1.1 Classification of actions ............................................................................................................ 31
4.1.2 Characteristic values of actions ................................................................................................ 31
4.1.3 Other representative values of variable actions........................................................................ 33
4.1.4 Representation of fatigue actions.............................................................................................. 33
4.1.5 Representation of dynamic actions ........................................................................................... 34
4.1.6 Geotechnical actions................................................................................................................. 34
4.1.7 Environmental influences.......................................................................................................... 34
4.2 M
ATERIAL AND PRODUCT PROPERTIES
.............................................................................................. 34
4.3 G
EOMETRICAL DATA
......................................................................................................................... 35
SECTION 5 STRUCTURAL ANALYSIS AND DESIGN ASSISTED BY TESTING................... 37
5.1 S
TRUCTURAL ANALYSIS
.................................................................................................................... 37
5.1.1 Structural modelling.................................................................................................................. 37
5.1.2 Static actions ............................................................................................................................. 37
5.1.3 Dynamic actions........................................................................................................................ 37
Page 3
prEN 1990:2001
5.1.4 Fire design ................................................................................................................................ 38
5.2 D
ESIGN ASSISTED BY TESTING
........................................................................................................... 39
SECTION 6 VERIFICATION BY THE PARTIAL FACTOR METHOD..................................... 40
6.1 G
ENERAL
.......................................................................................................................................... 40
6.2 L
IMITATIONS
..................................................................................................................................... 40
6.3 D
ESIGN VALUES
................................................................................................................................40
6.3.1 Design values of actions............................................................................................................ 40
6.3.2 Design values of the effects of actions....................................................................................... 41
6.3.3 Design values of material or product properties ...................................................................... 42
6.3.4 Design values of geometrical data ............................................................................................ 42
6.3.5 Design resistance ...................................................................................................................... 43
6.4 U
LTIMATE LIMIT STATES
................................................................................................................... 44
6.4.1 General...................................................................................................................................... 44
6.4.2 Verifications of static equilibrium and resistance..................................................................... 45
6.4.3 Combination of actions (fatigue verifications excluded)........................................................... 45
6.4.3.1 General ................................................................................................................................................45
6.4.3.2 Combinations of actions for persistent or transient design situations (fundamental combinations) ....46
6.4.3.3 Combinations of actions for accidental design situations....................................................................47
6.4.3.4 Combinations of actions for seismic design situations ........................................................................47
6.4.4 Partial factors for actions and combinations of actions ........................................................... 47
6.4.5 Partial factors for materials and products................................................................................48
6.5 S
ERVICEABILITY LIMIT STATES
.......................................................................................................... 48
6.5.1 Verifications .............................................................................................................................. 48
6.5.2 Serviceability criteria ................................................................................................................ 48
6.5.3 Combination of actions ............................................................................................................. 48
6.5.4 Partial factors for materials...................................................................................................... 49
ANNEX A1
(NORMATIVE)
APPLICATION FOR BUILDINGS ....................................................... 50
factors ................................................................................................................. 50
A1.3 U
LTIMATE LIMIT STATES
................................................................................................................. 51
A1.3.1 Design values of actions in persistent and transient design situations................................... 51
A1.3.2 Design values of actions in the accidental and seismic design situations .............................. 55
A1.4 S
ERVICEABILITY LIMIT STATES
....................................................................................................... 56
A1.4.1 Partial factors for actions....................................................................................................... 56
A1.4.2 Serviceability criteria ............................................................................................................. 56
A1.4.3 Deformations and horizontal displacements .......................................................................... 56
A1.4.4 Vibrations ............................................................................................................................... 58
ANNEX B
(INFORMATIVE)
MANAGEMENT OF STRUCTURAL RELIABILITY FOR
CONSTRUCTION WORKS ................................................................................................................... 59
B1 S
COPE AND FIELD OF APPLICATION
.................................................................................................... 59
B2 S
YMBOLS
.......................................................................................................................................... 59
B3 R
ELIABILITY DIFFERENTIATION
.......................................................................................................... 60
B3.1 Consequences classes ................................................................................................................ 60
B3.2 Differentiation by
ANNEX C
(INFORMATIVE)
BASIS FOR PARTIAL FACTOR DESIGN AND RELIABILITY
ANALYSIS................................................................................................................................................ 64
C1 S
COPE AND
F
IELD OF
A
PPLICATIONS
.................................................................................................. 64
C2 S
YMBOLS
........................................................................................................................................... 64
C3 I
NTRODUCTION
.................................................................................................................................. 65
A1.1 F
IELD OF APPLICATION
................................................................................................................... 50
A1.2 C
OMBINATIONS OF ACTIONS
........................................................................................................... 50
A1.2.1 General ................................................................................................................................... 50
A1.2.2 Values of
values ........................................................................................................ 60
B3.3 Differentiation by measures relating to the partial factors ....................................................... 61
B4 D
ESIGN SUPERVISION DIFFERENTIATION
............................................................................................ 61
B5 I
NSPECTION DURING EXECUTION
....................................................................................................... 62
B6 P
ARTIAL FACTORS FOR RESISTANCE PROPERTIES
............................................................................... 63
Page 4
prEN 1990:2001
C4 O
VERVIEW OF RELIABILITY METHODS
................................................................................................ 65
C5 R
ELIABILITY INDEX
......................................................................................... 67
C7 A
PPROACH FOR CALIBRATION OF DESIGN VALUES
............................................................................. 68
C8 R
ELIABILITY VERIFICATION FORMATS IN
E
UROCODES
....................................................................... 70
C9 P
ARTIAL FACTORS IN
EN 1990 .......................................................................................................... 71
C10
0
FACTORS
..................................................................................................................................... 72
ANNEX D
(INFORMATIVE)
DESIGN ASSISTED BY TESTING ..................................................... 74
D1 S
COPE AND FIELD OF APPLICATION
.................................................................................................... 74
D2 S
YMBOLS
.......................................................................................................................................... 74
D3 T
YPES OF TESTS
................................................................................................................................. 75
D4 P
LANNING OF TESTS
.......................................................................................................................... 76
D5 D
ERIVATION OF DESIGN VALUES
........................................................................................................ 78
D6 G
ENERAL PRINCIPLES FOR STATISTICAL EVALUATIONS
...................................................................... 79
D7 S
TATISTICAL DETERMINATION OF A SINGLE PROPERTY
...................................................................... 79
D7.1 General...................................................................................................................................... 79
D7.2 Assessment via the characteristic value ....................................................................................80
D7.3 Direct assessment of the design value for ULS verifications..................................................... 81
D8 S
TATISTICAL DETERMINATION OF RESISTANCE MODELS
.................................................................... 82
D8.1 General...................................................................................................................................... 82
D8.2 Standard evaluation procedure (Method (a))............................................................................ 82
D8.2.1 General ................................................................................................................................................82
D8.2.2 Standard procedure..............................................................................................................................83
D8.3 Standard evaluation procedure (Method (b))............................................................................ 87
D8.4 Use of additional prior knowledge ............................................................................................ 87
BIBLIOGRAPHY .................................................................................................................................... 89
......................................................................................................................... 66
C6 T
ARGET VALUES OF RELIABILITY INDEX
Page 5
prEN 1990:2001
Foreword
This European Standard has been prepared by Technical Committee CEN/TC 250
« Structural Eurocodes », the secretariat of which is held by BSI.
This document is currently submitted to the Formal Vote.
CEN/TC250 is responsible for all Structural Eurocodes.
This European Standard supersedes ENV 1991-1:1994.
Background of the Eurocode programme
In 1975, the Commission of the European Community decided on an action programme
in the field of construction, based on article 95 of the Treaty. The objective of the
programme was the elimination of technical obstacles to trade and the harmonisation of
technical specifications.
Within this action programme, the Commission took the initiative to establish a set of
harmonised technical rules for the design of construction works which, in a first stage,
would serve as an alternative to the national rules in force in the Member States and,
ultimately, would replace them.
For fifteen years, the Commission, with the help of a Steering Committee with Repre-
sentatives of Member States, conducted the development of the Eurocodes programme,
which led to the first generation of European codes in the 1980’s.
In 1989, the Commission and the Member States of the EU and EFTA decided, on the
basis of an agreement
1
between the Commission and CEN, to transfer the preparation
and the publication of the Eurocodes to CEN through a series of Mandates, in order to
provide them with a future status of European Standard (EN). This links
de facto
the
Eurocodes with the provisions of all the Council’s Directives and/or Commission’s De-
cisions dealing with European standards (
e.g.
the Council Directive 89/106/EEC on
construction products - CPD - and Council Directives 93/37/EEC, 92/50/EEC and
89/440/EEC on public works and services and equivalent EFTA Directives initiated in
pursuit of setting up the internal market).
The Structural Eurocode programme comprises the following standards generally con-
sisting of a number of Parts:
EN 1990
Eurocode :
Basis of Structural Design
EN 1991
Eurocode 1:
Actions on structures
EN 1992
Eurocode 2:
Design of concrete structures
EN 1993
Eurocode 3:
Design of steel structures
1
Agreement between the Commission of the European Communities and the European Committee for Standardisation (CEN)
concerning the work on EUROCODES for the design of building and civil engineering works (BC/CEN/03/89).
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