ISO 22111:2019

INTERNATIONAL ISO
STANDARD 22111
Second edition
2019-09
Bases for design of structures —
General requirements
Bases du calcul des constructions — Exigences générales
Reference number
©
ISO 2019
© ISO 2019
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ii © ISO 2019 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 General terms . 1
3.2 Terms related to design and assessment . . 2
3.3 Terms related to actions and resistances . 5
4 Symbols and abbreviated terms . 7
4.1 General . 7
4.2 Latin characters . 7
4.3 Greek characters . 8
4.4 Subscripts . 9
5 Fundamental requirements for structural performance . 9
5.1 General . 9
5.2 Design situations .10
5.3 Limit states .10
5.4 Considerations for actions, environmental influences and action combinations .10
5.5 Considerations for resistance .11
5.6 Considerations for design verification .11
6 Classification for establishing reliability .12
6.1 Safety consideration .12
6.2 Serviceability consideration .12
6.3 Reliability classes .12
7 Principles of limit states design.13
7.1 General .13
7.2 Verification of ultimate limit states .13
7.3 Verification of serviceability limit states .13
8 Actions .14
8.1 General .14
8.2 Permanent actions .14
8.3 Variable actions .14
8.4 Accidental actions .15
8.5 Evaluation of actions and their effects .15
8.6 Design values of actions .15
8.7 Characteristic values of actions .15
9 Combinations of actions .16
9.1 General .16
9.2 Design scenarios .16
9.3 Additional considerations for serviceability limit state .16
9.4 Design values of combinations of action effects.16
10 Resistance .17
10.1 General .17
10.2 Material properties .17
10.3 Geometrical data .17
10.4 Characteristic values of resistance parameters .18
10.5 Design value of resistance .18
11 Analysis and testing .19
11.1 Analysis.19
11.2 Testing .20
12 Demonstrating conformance with requirements .20
12.1 General .20
12.2 Ultimate limit state .21
12.2.1 Resistance .21
12.2.2 Static equilibrium .21
12.2.3 Accidental design situation .21
12.2.4 Seismic design situation .21
12.3 Serviceability .21
12.4 Robustness .22
12.4.1 General.22
12.4.2 Design strategies .22
12.4.3 Prescriptive verification measures .23
12.4.4 Collapse scenarios .23
12.5 Durability .23
Annex A (informative) Guidance for the adoption of this document .24
Annex B (informative) Formats for presentation of design values for combinations of actions .30
Annex C (informative) Target reliability differentiation in existing standard practice .36
Annex D (informative) Design procedure .39
Bibliography .41
iv © ISO 2019 – All rights reserved

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governme
...