Konstruktionsaspekter

1.1 Scope of EN 1998-1-1

(1) This document is applicable to the design and verification of buildings and other structures for earthquake resistance. It gives general rules relevant to all types of structures, except for structures belonging to consequence classes CC0 or CC4.

NOTE For further details on consequence class CC4, see 4.2.

(2) This document provides basic performance requirements and compliance criteria applicable to buildings and other structures for earthquake resistance.

(3) This document gives rules for the representation of seismic actions and the description of the design seismic situations. NOTE Certain types of structures, dealt with in other parts of Eurocode 8, 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 contains rules for modelling and verification of ultimate strengths and deformations.

1.2 Assumptions

(1) The assumptions of EN 1990 apply to this document.

(2) It is assumed that no change in the structure and in the masses carried by the structure takes 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 also to ancillary elements (see 3.1.2). Due to the specific nature of 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 geometry, the detailing, and the properties of the materials of all 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 in the design documents and the verification methods to be used are assumed to be specified.

4(5) It is assumed that in the 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 specified.

EN 1998-2 is intended to be applied to the design of new bridges in seismic regions. It covers the design of reinforced concrete, steel and composite steel-concrete bridges and provides guidance for the design of timber bridges. EN 1998-2 is applicable to the seismic design of bridges exploiting ductility in structural members or through the use of antiseismic devices. When ductility is exploited, this part primarily covers bridges in which the horizontal seismic actions are mainly resisted through bending of the piers or at the abutments; i.e. of bridges composed of vertical or nearly vertical pier systems supporting the traffic deck superstructure. It is also applicable to the seismic design of arched bridges, although its provisions should not be considered as fully covering these cases. Suspension bridges and masonry bridges, moveable bridges and floating bridges are not included in the scope of EN 1998-2.

1.1 Scope of EN 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 assumptions of EN 1990 apply to this document.

(1) EN 1991-1-1 gives rules on the following aspects related to actions, which are relevant to the structural design of buildings and civil engineering works including some geotechnical aspects:

- specific weight of construction materials and stored materials;

- self-weight of construction works;

- imposed loads for buildings.

(2) Mean values for specific weight of specific construction materials, additional materials for bridges, stored materials and products are given. In addition, for specific materials and products the angle of repose is provided.

(3) Methods for the assessment of the characteristic values of self-weight of construction works are given.

(4) Characteristic values of imposed loads are given for the following areas in buildings according to the category of use:

- residential, social, commercial and administration areas;

- areas for archive, storage and industrial activities;

- garage and vehicle traffic areas (excluding bridges);

- roofs; - stairs and landings;

- terraces and balconies.

NOTE The loads on traffic areas given in this standard refer to vehicles up to a gross vehicle weight of 160 kN. Further information can be obtained from EN 1991-2.

(5) Characteristic values of horizontal imposed loads on parapets and partition walls acting as barriers are provided.

NOTE Forces due to vehicle impact are specified in EN 1991-1-7 and EN 1991-2. 1.2

Assumptions

(1) The general assumptions of EN 1990 apply.

(2) EN 1991-1-1 is intended to be used with EN 1990, the other parts of EN 1991 and the other Eurocode parts for the design of structures.

1.1 Scope of EN 1991-1-3

(1) EN 1991-1-3 gives principles and rules to determine the values of loads due to snow to be used for the structural design of buildings and civil engineering works.

(2) This document does not apply to sites at altitudes above 1 500 m, unless otherwise specified.

NOTE For rules for the treatment of snow loads for altitudes above 1 500 m, see 6.1.

(3) This document does not give guidance on specialist aspects of snow loading, for example:

- impact snow loads resulting from snow sliding off or falling from a higher roof;

- changes in shape or size of the construction works due to the presence of snow or the accretion of ice which could affect the wind action;

- loads in areas where snow is present all year round;

- lateral loading due to snow creep (e.g. lateral loads exerted by drifts);

- loads due to artificial snow.

1.2 Assumptions

The assumptions given in EN 1990:2023, 1.2 apply.

1.1 Scope of EN 1991-1-5

(1) EN 1991-1-5 gives principles and rules for calculating thermal actions on buildings, bridges and other structures including their structural members. Principles needed for cladding and other attachments of buildings are also provided.

(2) This document describes the changes in the temperature of structural members. Characteristic values of thermal actions are presented for use in the design of structures which are exposed to daily and seasonal climatic changes.

(3) This document also gives principles for changes in the temperature of structural members due to the paving of hot asphalt on bridge decks.

(4) This document also provides principles and rules for thermal actions acting in structures which are mainly a function of their use (e.g. cooling towers, silos, tanks, warm and cold storage facilities, hot and cold services, etc.).

NOTE Supplementary guidance for thermal actions on chimneys is provided in EN 13084-1.

1.2 Assumptions

(1) The assumptions given in EN 1990:2023, 1.2 apply.

(2) EN 1991 1 5 is intended to be used with EN 1990, the other parts of EN 1991 and EN 1992 (all parts) to EN 1999 (all parts) for the design of structures.

(1) EN 1991-1-7 provides actions and rules for safeguarding buildings and civil engineering works against identifiable accidental actions.

NOTE 1 Identifiable accidental actions include impact from vehicles and internal explosions.

NOTE 2 Rules on impact from vehicles travelling on a bridge deck are given in EN 1991-2.

(2) EN 1991-1-7 also covers: actions and rules for tying systems and key members; information on risk assessment; dynamic design for impact; actions for internal explosions; actions from debris.

(3) Actions from ship operations such as berthing and mooring are outside the scope of this document.

(4) Actions due to high explosives that detonate are outside the scope of this document.

1.1 Scope of EN 1991-1-9

(1) EN 1991 1 9 gives principles and rules to determine the values of loads due to atmospheric icing to be used for following types of structures:

- masts;

- towers;

- antennas and antenna structures;

- cables, stays, guy ropes and similar structures;

- rope ways (cable railways);

- structures for ski-lifts;

- buildings or parts of them exposed to potential icing;

- special types of structures, such as towers for transmission lines and wind turbines.

NOTE Atmospheric icing on electrical overhead lines is covered by EN 50341-1.

(2) EN 1991-1-9 specifies values for:

- dimensions and weight of accreted ice;

- shapes of accreted ice. (3) EN 1991-1-9 covers types of icing, ice loads acting on structures, and falling ice considerations.

NOTE For wind actions on iced structures, see EN 1991-1-4.

1.2 Assumptions

The assumptions given in EN 1990:2023, 1.2 apply. EN 1991-1-9 is intended to be used with EN 1990 (all parts), the other parts of EN 1991 and EN 1992 (all parts) to EN 1999 (all parts) for the design of structures.