ДСТУ-Н Б EN 1992-1-2:2012
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EN 1992-1-2:2004 - -
page
Foreword VI
Background of the Eurocode programme . . 1 Status and field of application of Eurocodes 2
National Standards implementing Eurocodes 4
Links between Eurocodes and products harmonised technical specifications (ENs and ETAs) 4
Additional information specific to EN 1992-1-2 5
National Annex for EN 1992-1-2 9
1 General 10
1.1 Scope 10
1.2 Normative references 12
1.3 Assumptions 12
1.4 Distinction between principles and application rules 12
1.5 Definitions 12
1.6 Symbols 13
2 Basis of design 15
2.1 Requirements 15
2.2 Actions 18
2.3 Design values of material properties 18
2.4 Verification methods 19
3 Material properties 22
3.1 General 22
3.2 Strength and deformation properties at elevated temperatures 22
3.3 Thermal and physical properties of concrete with siliceous and calcareous aggregates 30
3.4 Thermal elongation of reinforcing and prestressing steel 34
4 Design procedures 35
4.1 General 35
4.2 Simplified calculation method ... 36
4.3 Advanced calculation methods . . 41
4.4 Shear, torsion and anchorage . . 44
4.5 4.6 4.7 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 6 6.1 6.2 6.3 6.4 4.5 Spalling 44
4.6 Joints 45
4.7 Protective layers 46
5 Tabulated data 47
5.1 Scope 47
5.2 General design rules 47
5.3 Columns 52
5.4 Walls 57
5.5 Tensile members 59
5.6 Beams 59
5.7 Slabs 66
6 High strength concrete 73
6.1 General 73
6.2 Spalling 74
6.3 Thermal properties 75
6.4 Structural design 75
Annex A Temperature profiles 78
Annex Annex C
Buckling of columns under fire conditions 102
Annex D
Calculation methods for shear, torsion and anchorage 115
Annex E Simplified calculation method for beams and slabs 119 Foreword
This European Standard EN 1992-1-2:2004, "Design of concrete structures - Part 1-2 General rules - Structural fire design", has been prepared by Technical Committee CEN/TC250 "Structural Eurocodes", the Secretariat of which is held by BSI. CEN/TC250 is responsible for all Structural Eurocodes.
This European Standard shall be given the status of a National Standard, either by publication of an identical text or by endorsement, at the latest by June 2005, and conflicting National Standards shall be withdrawn at latest by March 2010.
This European Standard supersedes ENV 1992-1-2:1995.
According to the CEN-CENELEC Internal Regulations, the National Standard Organizations of the following countries are bound to implement these European Standard: Austria, Belgium, Cyrus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Eurocode 2 DESIGN OF CONCRETE STRUCTURESPart 1-2. General rules. Structural fire design
Background to 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 harmonization of technical specifications.
Within this action programme, the Commission took the initiative to establish a set of harmonized 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 Representatives of Member States, conducted the development of the Eurocodes programme, which led to the first generation of European codes in the 1980s.
In 1989, the Commission and the Member States of the EU and EFTA decided, on the basis of an agreementl 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
1 EN 1990 EN 1991 EN 1992 EN 1993 EN 1994 EN 1995 EN 1996 EN 1997 EN 1999 - the Eurocodes with the provisions of all the Council’s Directives and/or Commission’s Decisions 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 consisting of a number of Parts:
EN 1990 Eurocode 0: 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
EN 1994 Eurocode 4: Design of composite steel and concrete structures
EN 1995 Eurocode 5: Design of timber structures
EN 1996 Eurocode 6: Design of masonry structures
EN 1997 Eurocode 7: Geotechnical design
EN 1998 Eurocode 8: Design of structures for earthquake resistance
EN 1999 Eurocode 9: Design of aluminium structures
Eurocode standards recognize the responsibility of regulatory authorities in each Member State and have safeguarded their right to determine values related to regulatory safety matters at national level where these continue to vary from State to State.
Status and field of applicationof Eurocodes
The Member States of the EU and EFTA recognize that Eurocodes serve as reference documents for the following purposes:
- as a means to prove compliance of building and civil engineering works with the essential requirements of Council Directive 89/106/EEC, particularly Essential Requirement №?1 - Mechanical resistance and stability - and Essential Requirement №?2 - Safety in case of fire;
- - a) give concrete form to the essential requirements by harmonizing the terminology and the technical bases and indicating classes or levels for each requirement where necessary;
b) indicate methods of correlating these classes or levels of requirement with the technical specifications, e.g. methods of calculation and of proof, technical rules for project design, etc.;
c) serve as a reference for the establishment of harmonized standards and guidelines for European technical approvals.
The Eurocodes, de facto, play a similar role in the field of the ER 1 and a part of ER 2.. - as a basis for specifying contracts for construction works and related engineering services;
- as a framework for drawing up harmonized technical specifications for construction products (ENs and ETAs).
The Eurocodes, as far as they concern the construction works themselves, have a direct relationship with the Interpretative Documents 2 referred to in Article 12 of the CPD, although they are of a different nature from harmonized product standards 3 . Therefore, technical aspects arising from the Eurocodes work need to be adequately considered by CEN Technical Committees and/or EOTA Working Groups working on product standards with a view to achieving full compatibility of these technical specifications with the Eurocodes.
The Eurocode standards provide common structural design rules for everyday use for the design of whole structures and component products of both a traditional and an innovative nature. Unusual forms of construction or design conditions are not specifically covered and additional expert consideration will be required by the designer in such cases.
2 3 а?) Ь?) с?) - - - - - - National Standards implementingEurocodes
The National Standards implementing Eurocodes will comprise the full text of the Eurocode (including any Annexes), as published by CEN, which may be preceded by a National title page and National foreword, and may be followed by a National Annex (informative).
The National Annex (informative) may only contain information on those parameters which are left open in the Eurocode for national choice, known as Nationally Determined Parameters, to be used for the design of buildings and civil engineering works to be constructed in the country concerned, i.e.:
- values and/or classes where alternatives are given in the Eurocode,
- values to be used where a symbol only is given in the Eurocode,
- country specific data (geographical, climatic, etc), e.g. snow map,
- the procedure to be used where alternative procedures are given in the Eurocode,
- decisions on the application of informative annexes,
- references to non-contradictory complementary information to assist the user to apply the Eurocode.
Links between Eurocodes and productsharmonized technical specifications(ENs and ETAs)
There is a need for consistency between the harmonized technical specifications for construction products and the technical rules for works 4 . Furthermore, all the information accompanying the CE Marking of the construction products which refer to Eurocodes should clearly mention which Nationally Determined Parameters have been taken into account.
4 5.2 ID №? 1. EN 1992-1-2 EN 1992-1 -2 " - - - - - Additional information specificto EN 1992-1-2
EN 1992-1-2 describes the principles, requirements and rules for the structural design of buildings exposed to fire, including the following aspects.
Safety requirements
EN 1992-1-2 is intended for clients (e.g. for the formulation of their specific requirements), designers, contractors and relevant authorities.
The general objectives of fire protection are to limit risks with respect to the individual and society, neighbouring property, and where required, environment or directly exposed property, in the case of fire.
Construction Products Directive 89/106/EEC gives the following essential requirement for the limitation of fire risks:
"The construction works must be designed and built in such a way, that in the event of an outbreak of fire
- the load bearing resistance of the construction can be assume
