1、BRITISH STANDARDBS EN 1996-1-2:2005Eurocode 6: Design of masonry structures Part 1-2: General rules Structural fire designICS 13.220.50; 91.010.30; 91.080.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55
2、g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Incorporating corrigendum October 2010National forewordThis British Standard is the official English language version of EN 1996-1-2:2005, incorporating corrigendum October 2010. It supersedes DD ENV 1996-1-2:1997 which is withdrawn. The start
3、 and finish of text introduced or altered by corrigendum is indicated in the text by tags. Text altered by CEN corrigendum October 2010 is indicated in the text by .The structural Eurocodes are divided into packages by grouping Eurocodes for each of the main materials, concrete, steel, composite con
4、crete 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 The conflicting national standards will be withdrawn at the end of the coexistence period, after all the EN Eurocodes of a package a
5、re available. Following publication of the EN, there is a period of 2 years allowed for the national calibration period during which the national annex is issued, followed by a three year coexistence period. During the coexistence period Member States will be encouraged to adapt their national provi
6、sions to withdraw conflicting national rules before the end of the coexistent period. The Commission in consultation with Member States is expected to agree the end of the coexistence period for each package of Eurocodes. At the end of this co-existence period, the national standards will be withdra
7、wn. In the UK, the following standard will be partially superseded: BS 5628-3:2001, Code of practice for use of masonry Part 3: Materials and components, design and workmanship and based on this transition period, this standard will be withdrawn on a date to be announced. The UK participation in its
8、 preparation was entrusted by Technical Committee B/525, Building and civil engineering structures, to Subcommittee B/525/6, Use of masonry. 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
9、be 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 particular method or a particular application rule if sever
10、al are proposed in the EN. To enable EN 1996-1-2 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 public consultation has taken place. This publication does not purport to include all the necessary provisions of a contract
11、. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations.BS EN 1996-1-2:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2005 BSI 2011Amendments/corrigend
12、a issued since publicationDate Comments 31 July 2011 Implementation of CEN corigendum October 2010ISBN 978 0 580 73699 5EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORMEN 1996-1-2 May 2005 ICS 13.220.50; 91.010.30; 91.080.30 Incorporating corrigendum October 2010Supersedes ENV 1996-1-2:1995English
13、version Eurocode 6 - Design of masonry structures - Part 1-2: General rules - Structural fire design Eurocode 6 - Calcul des ouvrages en maonnerie - Partie 1-2: Rgles gnrales - Calcul du comportement au feu Eurocode 6 - Bemessung und Konstruktion von Mauerwerksbauten - Teil 1-2: Allgemeine Regeln -
14、Tragwerksbemessung fr den Brandfall This European Standard was approved by CEN on 4 November 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-t
15、o-date lists and bibliographical 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
16、 the responsibility of a CEN member 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, Icel
17、and, Ireland, Italy, Latvia, Lithuania, 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 20 0 CEN All rights of exploitatio
18、n in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1996-1-2:2005: EManagement Centre: Avenue Marnix 17, B-1000 Brussels 12ContentsPageForeword 4 Background of the Eurocode programme4 Status and field of application of Eurocodes.5 National Standards implementing E
19、urocodes6 Links between Eurocodes and products harmonised technical specifications (ENs and ETAs).6Additional information specific to EN 1996-1-2.7 National Annex for EN 1996-1-2 9 Section 1. General 9 1.1 Scope .91.2 Normative references.101.3 Assumptions 111.4 Distinction between Principles and ap
20、plication Rules 11 1.5 Definitions .111.5.1 Special terms relating to fire design in general 121.5.2 Special terms relating to calculation methods 131.6 Symbols .13Section 2. Basic principles and rules . 15 2.1 Performance requirement 15 2.1.1 General. 152.1.2 Nominal fire exposure . 152.1.3 Paramet
21、ric fire exposure 162.2 Actions.162.3 Design values of material properties .16 2.4 Assessment methods172.4.1 General. 172.4.2 Member analysis. 182.4.3 Analysis of part of the structure. 20BS EN 1996-1-2:2005EN 1996-1-2:2005 (E)32.4.4 Global structural analysis. 20Section 3. Materials 20 3.1 Units.20
22、3.2 Mortar 203.3 Mechanical properties of masonry 20 3.3.1 Mechanical properties of masonry at normal temperature. 203.3.2 Strength and deformation properties of masonry at elevated temperature. 213.3.2.1 General 213.3.2.2 Unit mass 213.3.3 Thermal properties. 213.3.3.1 Thermal elongation. 213.3.3.2
23、 Specific heat capacity . 213.3.3.3 Thermal conductivity 21Section 4. Design Procedures for obtaining fire resistance of masonry walls. 21 4.1 General information on the design of walls.21 4.1.1 Wall types by function. 214.1.2 Cavity walls and untied walls comprising independent leaves 224.2 Surface
24、 finishes rendering mortar and plaster. .24 4.3 Additional requirements for masonry walls 24 4.4 Assessment by testing244.5 Assessment by tabulated data25 4.6 Assessment by calculation.25 Section 5. Detailing 25 5.1 General.255.2 Junctions and joints .265.3 Fixtures, pipes and cables26Annex A (Infor
25、mative) Guidance on selection of fire resistance periods . 28 Annex B (Normative) Tabulated fire resistance of masonry walls 29 Annex C (Informative) Simplified calculation model 63 Annex D (Informative) Advanced calculation method. 72 Annex E (Informative) Examples of connections that meet the requ
26、irements of Section 5. 8 0BS EN 1996-1-2:2005EN 1996-1-2:2005 (E)4Foreword This document (EN 1996-1-2:2005) has been prepared by Technical Committee CEN/TC 250 “Structural Eurocodes“, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, ei
27、ther by publication of an identical text or by endorsement, at the latest by November 2005 and conflicting national standards shall be withdrawn at the latest by March 2010. This document supersedes ENV 1996-1-2:1995. CEN/TC 250 is responsible for all Structural Eurocodes. Background of the Eurocode
28、 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 th
29、is 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 ye
30、ars, 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 ba
31、sis of an agreement1between the Commission and CEN, to transfer the preparation and the publication of the Eurocodes to the 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 Coun
32、cils Directives and/or Commissions 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
33、up the internal market). The Structural Eurocode programme comprises the following standards generally consisting 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
34、 of steel structures EN 1994 Eurocode 4: Design of composite steel and concrete structures 1Agreement 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/CE
35、N/03/89).BS EN 1996-1-2:2005EN 1996-1-2:2005 (E)5EN 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 structu
36、res Eurocode standards recognise 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 application of Eurocode
37、s The Member States of the EU and EFTA recognise 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 N1 Mec
38、hanical resistance and stability and Essential Requirement N2 Safety in case of fire; - as a basis for specifying contracts for construction works and related engineering services; - as a framework for drawing up harmonised technical specifications for construction products (ENs and ETAs) The Euroco
39、des, as far as they concern the construction works themselves, have a direct relationship with the Interpretative Documents2referred 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 n
40、eed 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
41、 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. 2According to Art. 3.3 of the CPD, th
42、e essential requirements (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
43、 form to the essential 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
44、and of proof, technical 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 1996-1-2:2005EN 1996-1-2:2005
45、 (E)6National Standards implementing Eurocodes 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. The Na
46、tional Annex 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 clas
47、ses 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, and it may also contain - deci
48、sions on the application of informative annexes, - references to non-contradictory complementary information to assist the user to apply the Eurocode.Links between Eurocodes and products harmonised technical specifications (ENs and ETAs)There is a need for consistency between the harmonised technica
49、l specifications for construction products and the technical rules for works4. 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. This European Standard is part of EN 1996 which comprises the following parts: EN 1996-1-2: General Rules - Structural Fire Design. EN 1996-2: Design, Selection of materials and execution of masonry EN 1996-1-2 is intended to be used together with EN 1990, EN 1991-1-2, EN 199
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