1、BRITISH STANDARD BS EN 1992-1-2:2004 Eurocode 2: Design of concrete structures Part 1-2: General rules Structural fire design ICS 13.220.50; 91.010.30; 91.080.40 Incorporating corrigendum July2008National foreword This British Standard is the UK implementation of EN 1992-1-2:2004, in- corporating co
2、rrigendum July 2008. It supersedes DD ENV 1992-1-2:1996 which is withdrawn. The start and finish of text introduced or altered by corrigendum is indicated in the text by tags. Text altered by CEN corrigendum July 2008 is indicated in the text by . The structural Eurocodes are divided into packages b
3、y grouping Eurocodes for each of the main materials, concrete, steel, composite concrete and steel, timber, masonry and aluminium, this is to enable a common date of withdrawal (DOW) for all the relevant parts that are needed for a particular design. The conflicting national standards will be withdr
4、awn at the end of the coexistence period, after all the EN Eurocodes of a package are available. Following publication of the EN, there is a period allowed for national calibration period during which the National Annex is issued, followed by a coexistence period of a maximum of three years. During
5、the coexistence period Member States will be encouraged to adapt their national provisions. At the end of this co-existence period, the conflicting parts of national standards will be withdrawn. In this case, there are no corresponding national standards The UK participation in its preparation was e
6、ntrusted by Technical Com- mittee B/525, Building and civil engineering structures, to Subcommittee B/ 525/2, Structural use of concrete. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Where a normative part of this EN allows for a choice to be
7、made at the national level, the range and possible choice will be given in the normative text, 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 particu- lar method or a particular application rule if severa
8、l are proposed in the EN. To enable EN 1992-1-2 to be used in the UK, the NDPs will be published in a National Annex, which will be made available by BSI in due course, after pubic consultation has taken place. This publication does not purport to include all the necessary provisions of a contract.
9、Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. BS EN 1992-1-2:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 9 February 2005 BSI 2010 Amendments/corri
10、genda issued since publication Date Comments 28 February 2010 Implementation of CEN corrigendum July 2008 ISBN 978 0 580 64131 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1992-1-2 December 2004 ICS 13.220.50; 91.010.30; 91.080.40 Supersedes ENV 1992-1-2:1995 English version Eurocode 2: De
11、sign of concrete structures - Part 1-2: General rules - Structural fire design Eurocode 2: Calcul des structures en bton - Partie 1-2: Rgles gnrales - Calcul du comportement au feu Eurocode 2: Planung von Stahlbeton- und Spannbetontragwerken - Teil 1-2: Allgemeine Regeln - Tragwerksbemessung fr den
12、Brandfall This European Standard was approved by CEN on 8 July 2004. 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 bibliographic
13、al references concerning such national standards may be obtained on application to the Central Secretariat 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 m
14、ember into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, L
15、ithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2004 CEN
16、All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1992-1-2:2004: EIncorporating corrigendum July 2008 2 ContentsList1 General 1.1 Scope 1.1.1 Scope of Eurocode 2 1.1.2 Scope of Part 1-2 of Eurocode 2 1.2 Normative references 1.3 Assumpti
17、ons 1.4 Distinctions between principles and application rules 1.5 Definitions 1.6 Symbols 1.6.1 Supplementary symbols to EN 1992-1-1 1.6.2 Supplementary subscripts to EN 1992-1-1 2 Basis of design 2.1 Requirements 2.1.1 General 2.1.2 Nominal fire exposure 2.1.3 Parametric fire exposure 2.2 Actions 2
18、.3 Design values of material properties 2.4 Verification methods 2.4.1 General 2.4.2 Member analysis 2.4.3 Analysis of part of the structure 2.4.4 Global structural analysis 3 Material properties 3.1 General 3.2 Strength and deformation properties at elevated temperatures 3.2.1 General 3.2.2 Concret
19、e 3.2.2.1 Concrete under compression 3.2.2.2 Tensile strength 3.2.3 Reinforcing steel 3.2.4 Prestressing steel 3.3 Thermal and physical properties of concrete with siliceous and calcareous aggregates 3.3.1 Thermal elongation 3.3.2 Specific heat 3.3.3 Thermal conductivity 3.4 Thermal elongation of re
20、inforcing and prestressing steel 4 Design procedures 4.1 General 4.2 Simplified calculation method 4.2.1 General 4.2.2 Temperature profiles 4.2.3 Reduced cross-section 4.2.4 Strength reduction 4.2.4.1 General BS EN 1992-1-2:2004 EN 1992-1-2:2004 (E) 3 4.2.4.2 Concrete 4.2.4.3 Steel 4.3 Advanced calc
21、ulation methods 4.3.1 General 4.3.2 Thermal response 4.3.3 Mechanical response 4.3.4 Validation of advanced calculation models 4.4 Shear, torsion and anchorage 4.5 Spalling 4.5.1 Explosive spalling 4.5.2 Falling off of concrete 4.6 Joints 4.7 Protective layers 5 Tabulated data 5.1 Scope 5.2 General
22、design rules 5.3 Columns 5.3.1 General 5.3.2 Method A 5.3.3 Method B 5.4 Walls 5.4.2 Load-bearing solid walls 5.4.3 Fire walls 5.5 Tensile members 5.6 Beams 5.6.1 General 5.6.2 Simply supported beams 5.6.3 Continuous beams 5.6.4 Beams exposed on all sides 5.7 Slabs 5.7.1 General 5.7.2 Simply support
23、ed solid slabs 5.7.3 Continuous solid slabs 5.7.4 Flat slabs 5.7.5 Ribbed slabs 6 High strength concrete (HSC) 6.1 General 6.2 Spalling 6.3 Thermal properties 6.4 Structural design 6.4.1 Calculation of load-carrying capacity 6.4.2 Simplified calculation method 6.4.2.1 Columns and walls 6.4.2.2 Beams
24、 and slabs 6.4.3 Tabulated data 5.4.1 Non load bearing compartmentation walls BS EN 1992-1-2:2004 EN 1992-1-2:2004 (E) 4 InformativeannexesA Temperature profiles B Simplified calculation methods C Buckling of columns under fire conditions D Calculation methods for shear, torsion and anchorage E Simp
25、lified calculation method for beams and slabs ForewordThis European Standard EN 1992-1-2 , “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
26、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
27、 standard supersedes ENV 1992-1-2: 1995. According to the CEN-CENELEC Internal Regulations, the National Standard Organisations of the following countries are bound to implement these European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hun
28、gary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BackgroundoftheEurocodeprogramme In 1975, the Commission of the European Community decided on an action programme in the fiel
29、d 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 rule
30、s 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, condu
31、cted 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 agreement 1between the Commission and CEN, to transfer the preparation and the 1 Agreement b
32、etween 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). BS EN 1992-1-2:2004 EN 1992-1-2:2004 (E) 5 publication of the Eurocodes to the CEN through a
33、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 Councils Directives and/or Commissions Decisions dealing with European standards (e.g. the Council Directive 89/106/EEC on construction produc
34、ts - 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
35、 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 EN 1994 Eurocode 4: Design of composite steel and concrete structures EN 1995 Eurocode 5: Design of timber structures
36、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 recognise the responsibility of regulatory authorities in each Member Stat
37、e 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. StatusandfieldofapplicationofEurocodes The Member States of the EU and EFTA recognise that Eurocodes serve as reference documents for the fo
38、llowing 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 N1 Mechanical resistance and stability and Essential Requirement N2 Safety in case of fire ; as a basis for sp
39、ecifying contracts for construction works and related engineering services ; as a framework for drawing up harmonised 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 Interpr
40、etative Documents2 referred to in Article 12 of the CPD, although they are of a different nature from harmonised product standards3. Therefore, technical aspects arising from the Eurocodes work need to be adequately considered by CEN Technical 2According to Art. 3.3 of the CPD, the essential require
41、ments (ERs) shall be given concrete form in interpretative documents for the creation of the necessary links between the essential requirements and the mandates for harmonised ENs and ETAGs/ETAs. 3According to Art. 12 of the CPD the interpretative documents shall : a) give concrete form to the essen
42、tial requirements by harmonising 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, tech
43、nical rules for project design, etc. ; c) serve as a reference for the establishment of harmonised 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. BS EN 1992-1-2:2004 EN 1992-1-2:2004 (E) 6 Committee
44、s 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
45、 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. NationalStandardsimplementingEurocodesThe National Standards implementing Eurocodes will compri
46、se 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. The National Annex may only contain information on those parameters which are left open in the Eurocode for na
47、tional 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 Eu
48、rocode, 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
49、 Eurocode. LinksbetweenEurocodesandproductsharmonisedtechnicalspecifications(ENsand ETAs)There is a need for consistency between the harmonised 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
