1、December 2010 Translation by DIN-Sprachendienst.English price group 26No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).I
2、CS 13.220.50; 91.010.30; 91.080.20!$lx“1738556www.din.deDDIN EN 1995-1-2Eurocode 5: Design of timber structures Part 1-2: General Structural fire design(includes Corrigendum AC:2009)English translation of DIN EN 1995-1-2:2010-12Eurocode 5: Bemessung und Konstruktion von Holzbauten Teil 1-2: Allgemei
3、ne Regeln Tragwerksbemessung fr den Brandfall(enthlt Berichtigung AC:2009)Englische bersetzung von DIN EN 1995-1-2:2010-12Eurocode 5: Conception et calcul des structures en bois Partie 1-2: Gnralits Calcul des structures au feu(Corrigendum AC:2009 inclus)Traduction anglaise de DIN EN 1995-1-2:2010-1
4、2SupersedesDIN EN 1995-1-2:2006-10 andDIN EN 1995-1-2 www.beuth.deDocument comprises 71 pagesIn case of doubt, the German-language original shall be considered authoritative.Corrigendum 1:2009-0902.11 DIN EN 1995-1-2:2010-12 2 A comma is used as the decimal marker. National foreword This standard ha
5、s been prepared by Technical Committee CEN/TC 250 “Structural Eurocodes” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Bauwesen (Building and Civil Engineering Standards Committee), Working Committee NA 005-52-22 AA Konstruktiver
6、baulicher Brandschutz. This European Standard is part of a series of standards dealing with structural design (Eurocodes) which are intended to be used as a “package”. In Guidance Paper L on the application and use of Eurocodes, issued by the EU Commission, reference is made to transitional periods
7、for the introduction of the Eurocodes in the Member states. The transitional periods given in the Foreword of this standard correlate approximately with those given in the Guidance Paper. In Germany, this standard is to be applied in conjunction with the National Annex. Attention is drawn to the pos
8、sibility that some of the elements of this document may be the subject of patent rights. DIN and/or DKE shall not be held responsible for identifying any or all such patent rights. Depending on the importance of the individual clauses, this standard distinguishes between principles and application r
9、ules (see also subclause 1.4). Principles are identified by the letter “P” after the number of the clause (e.g. (1)P). All clauses not marked as principles are application rules. The start and finish of text introduced or altered by amendment is indicated in the text by tags . Amendments This standa
10、rd differs from DIN V ENV 1995-1-2:1997-05 as follows: a) the prestandard status has been changed to that of a full standard; b) the comments received from the national member bodies of CEN have been taken into account and the standard has been completely revised; c) Corrigendum EN 1995-1-2:2004/AC:
11、2009 has been incorporated. Compared with DIN EN 1995-1-2:2006-10 and DIN EN 1995-1-2 Corrigendum 1:2009-09, the following corrections have been made: a) this standard is the consolidated version of the previous 2004 edition with Corrigendum 1:2009-09; b) the standard has been editorially revised. P
12、revious editions DIN V ENV 1995-1-2: 1997-05 DIN EN 1995-1-2: 2006-10 DIN EN 1995-1-2 Corrigendum 1: 2009-09 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1995-1-2 November 2004 + AC March 2009 English version Eurocode 5: Design of timber structures Part 1-2: General Structural fire design Eu
13、rocode 5: Conception et calcul des structures en bois Partie 1-2 : Gnralits Calcul des structures au feu Eurocode 5: Bemessung und Konstruktion von Holzbauten Teil 1-2: Allgemeine Regeln Tragwerksbemessung fr den Brandfall EN 1995-1-2:2004 was approved by CEN on 2004-04-16 and Amendment A1:2009 on 2
14、009-03-11. 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 bibliographical references concerning such national standards may be ob
15、tained on application to the Management Centre or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Ce
16、ntre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, No
17、rway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form
18、 and by any means reserved worldwide for CEN national Members. Ref. No. EN 1995-1-2:2004 + AC:2009 EICS 91.010.30; 91.080.20 Supersedes ENV 1995-1-2:1994Contents Background of the Eurocode programme 4 Status and field of application of Eurocodes 5 National Standards implementing Eurocodes 5 Links be
19、tween Eurocodes and harmonised technical specifications (ENs and ETAs) for products 6 Additional information specific to EN 1995-1-2 6 National annex for EN 1995-1-2 7 Section 1 General 9 1.1 Scope 9 1.1.1 Scope of Eurocode 5 9 1.1.2 Scope of EN 1995-1-2 9 1.2 Normative references 10 1.3 Assumptions
20、 10 1.4 Distinction between principles and application rules 10 1.5 Terms and definitions 11 1.6 Symbols 11 Section 2 Basis of design 14 2.1 Requirements 14 2.1.1 Basic requirements 14 2.1.2 Nominal fire exposure 14 2.1.3 Parametric fire exposure 14 2.2 Actions 15 2.3 Design values of material prope
21、rties and resistances 15 2.4 Verification methods 16 2.4.1 General 16 2.4.2 Member analysis 17 2.4.3 Analysis of parts of the structure 18 2.4.4 Global structural analysis 19 Section 3 Material properties 20 3.1 General 20 3.2 Mechanical properties 20 3.3 Thermal properties 20 3.4 Charring depth 20
22、3.4.1 General 20 3.4.2 Surfaces unprotected throughout the time of fire exposure 21 3.4.3 Surfaces of beams and columns initially protected from fire exposure 23 3.4.3.1 General 23 3.4.3.2 Charring rates 26 3.4.3.3 Start of charring 27 3.4.3.4 Failure times of fire protective claddings 28 3.5 Adhesi
23、ves 29 Section 4 Design procedures for mechanical resistance 30 4.1 General 30 4.2 Simplified rules for determining cross-sectional properties 30 4.2.1 General 30 4.2.2 Reduced cross-section method 30 4.2.3 Reduced properties method 31 4.3 Simplified rules for analysis of structural members and comp
24、onents 32 4.3.1 General 32 4.3.2 Beams 32 4.3.3 Columns 33 4.3.4 Mechanically jointed members 33 4.3.5 Bracings 34 4.4 Advanced calculation methods 34 Section 5 Design procedures for wall and floor assemblies 35 EN 1995-1-2:2004 + AC:2009 (E)DIN EN 1995-1-2:2010-12 2 Foreword to EN 1995-1-2:2004 + A
25、C:2009 4 5.1 General 35 5.2 Analysis of load-bearing function 35 5.3 Analysis of separating function 35 Section 6 Connections 36 6.1 General 36 6.2 Connections with side members of wood 36 6.2.1 Simplified rules 36 6.2.1.1 Unprotected connections 36 6.2.1.2 Protected connections 37 6.2.1.3 Additiona
26、l rules for connections with internal steel plates 38 6.2.2 Reduced load method 39 6.2.2.1 Unprotected connections 39 6.2.2.2 Protected connections 41 6.3 Connections with external steel plates 41 6.3.1 Unprotected connections 41 6.3.2 Protected connections 41 6.4 Simplified rules for axially loaded
27、 screws 41 Section 7 Detailing 43 7.1 Walls and floors 43 7.1.1 Dimensions and spacings 43 7.1.2 Detailing of panel connections 43 7.1.3 Insulation 43 7.2 Other elements 43 Annex A (informative) Parametric fire exposure 45 A1 General 45 A2 Charring rates and charring depths 45 A3 Mechanical resistan
28、ce of members in edgewise bending 47 Annex B (informative) Advanced calculation methods 48 B1 General 48 B2 Thermal properties 48 B3 Mechanical properties 50 Annex C (informative) Load-bearing floor joists and wall studs in assemblies whose cavities 52 C1 General 52 C2 Residual cross-section 52 C2.1
29、 Charring rates 52 C2.2 Start of charring 54 C2.3 Failure times of panels 54 C3 Reduction of strength and stiffness parameters 56 Annex D (informative) Charring of members in wall and floor assemblies with void cavities 58 D1 General 58 D2 Charring rates 58 D3 Start of charring 58 D4 Failure times o
30、f panels 58 Annex E (informative) Analysis of the separating function of wall and floor assemblies 60 E1 General 60 E2 Simplified method for the analysis of insulation 60 E2.1 General 60 E2.2 Basic insulation values 61 E2.3 Position coefficients 62 E2.4 Effect of joints 62 Annex F (informative) Guid
31、ance for users of this Eurocode Part 68 EN 1995-1-2:2004 + AC:2009 (E)DIN EN 1995-1-2:2010-12 3 are completely filled with insulation Background of the Eurocode programme In 1975, the Commission of the European Community decided on an action programme in the field of construction, based on article 9
32、5 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 rules for the design of construction work
33、s 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
34、 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 agreement1between the Commission and CEN, to transfer the preparation and the publication of the Eurocodes to the CEN through a s
35、eries 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 product
36、s - 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
37、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
38、EN 1996 Eurocode 6: Design of masonry structures EN 1997 Eurocode 7: Geotechnical design 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/CEN/
39、03/89). EN 1995-1-2:2004 + AC:2009 (E)DIN EN 1995-1-2:2010-12 4 This document (EN 1995-1-2:2004 + AC:2009) 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, eit
40、her by publication of an identical text or by endorsement, at the latest by May 2005, and conflicting national standards shall be withdrawn at the latest by March 2010. This document supersedes ENV 1995-1-2:1994. CEN/TC 250 is responsible for all Structural Eurocodes. According to the CEN-CENELEC In
41、ternal Regulations, the National Standard Organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxe
42、mbourg, Malta, Netherlands, Norway, Poland, Portugal, R mania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. oForeword to EN 1995-1-2:2004 + AC:2009 EN 1998 Eurocode 8: Design of structures for earthquake resistance EN 1999 Eurocode 9: Design of aluminium structures Eurocode sta
43、ndards 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 Eurocodes The Member Sta
44、tes 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 Mechanical resistance
45、 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 Eurocodes, as far as they c
46、oncern 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 need to be adequately
47、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 stru
48、ctures 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. National Standards implementing Eurocodes The National Sta
49、ndards 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 National 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 cl
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