DIN EN 1995-1-2 NA-2010 National Annex - Nationally determined parameters - Eurocode 5 Design of timber structures - Part 1-2 General - Structural fire design《国家附录 国家制定参数 欧洲规范5 木结构.pdf

1、December 2010 Translation by DIN-Sprachendienst.English price group 5No 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).IC

2、S 13.220.50; 91.010.30; 91.080.20!$lsJ“1738039www.din.deDDIN EN 1995-1-2/NANational Annex Nationally determined parameters Eurocode 5: Design of timber structures fire designEnglish translation of DIN EN 1995-1-2/NA:2010-12Nationaler Anhang National festgelegte Parameter Eurocode 5: Bemessung und Ko

3、nstruktion von Holzbauten Teil 1-2: AllgemeineRegeln Tragwerksbemessung fr den BrandfallEnglische bersetzung von DIN EN 1995-1-2/NA:2010-12Annexe Nationale Paramtres dtermins au plan national Eurocode 5: Conception et calcul des structures en bois Partie 1-2: Gnralits Calculdes structures au feuTrad

4、uction anglaise de DIN EN 1995-1-2/NA:2010-12www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.602.12Part 1-2: General StructuralDIN EN 1995-1-2/NA:2010-12 2 Contents Page Foreword 3 NA.1 Scope 4 NA.2 National provisions for the appl

5、ication of DIN EN 1995-1-2:2010-12 .4 NA.2.1 General 4 NA.2.2 National provisions4 NCI Bibliography .6 DIN EN 1995-1-2/NA:2010-12 3 Foreword This document (DIN EN 1995-1-2/NA) has been prepared by Working Committee NA 005-52-22 AA Konstruktiver baulicher Brandschutz (Spiegelausschuss zu Teilbereiche

6、n von CEN/TC 250), of the Normenausschuss Bauwesen (Building and Civil Engineering Standards Committee). This document is the National Annex to DIN EN 1995-1-2:2010-12, Eurocode 5: Design of timber structures Part 1-2: General Structural fire design. European Standard EN 1995-1-2:2004 allows nationa

7、l safety parameters, referred to as Nationally Determined Parameters (NDPs), to be specified for a number of points. The NDPs cover alternative verification methods, the provision of individual values and the selection of classes from designated classification systems. The relevant parts of the text

8、 are identified in the European Standard by references to the possibility of national choice and are listed in Clause NA.2.1. This National Annex also includes non-contradictory complementary information (NCI) for the application of DIN EN 1995-1-2:2010-12, as permitted by Guidance Paper L “Applicat

9、ion and use of Eurocodes” of the European Commission, as well as provisions for the application of the informative annexes of DIN EN 1995-1-2. The national provisions set out in this standard are based on investigations made and on the results of fire design analyses in accordance with DIN 4102-4, a

10、nd are intended to maintain the required national safety level. This National Annex is an integral part of DIN EN 1995-1-2:2010-12. DIN EN 1995-1-2/NA:2010-12 4 NA.1 Scope This National Annex contains national provisions relating to the structural fire design of timber structures, that are to be tak

11、en into account when applying DIN EN 1995-1-2:2010-12 in Germany. This National Annex is only valid in conjunction with DIN EN 1995-1-2:2010-12. NA.2 National provisions for the application of DIN EN 1995-1-2:2010-12 NA.2.1 General DIN EN 1995-1-2:2010-12 refers to the possibility of choosing Nation

12、ally Determined Parameters (NDPs) at the following places in the text: 2.1.3(2) 2.3(1)P 2.3(2)P 2.4.2(3) 4.2.1(1) In addition, NA 2.2 contains non-contradictory complementary information for the application of DIN EN 1995-1-2:2010-12. This information is preceded by the letters NCI. NA.2.2 National

13、provisions In the following, the clauses are numbered as in DIN EN 1995-1-2:2010-12. NCI re 1.2 Normative references DIN EN 1995-1-2:2010-12, Eurocode 5: Design of timber structures Part 1-2: General Structural fire design NDP re 2.1.3(2) Parametric fire exposure Re NOTE: The recommended values for

14、maximum temperature rise during the decay phase are 1= 200 K and 2= 240 K. Information on national choice can be found in the National Annex. The recommended values apply. NDP re 2.3(1)P Design values of material properties Re NOTE 2: The recommended partial safety factor for material properties in

15、fire is M,fi= 1,0. Information on national choice may be found in the National Annex. The recommended value applies. Translators note: For ease of reference, the texts of relevant notes taken from DIN EN 1992-2-1 are given in italics in each case above the specifications of this National Annex (whic

16、h are printed in upright font). DIN EN 1995-1-2/NA:2010-12 5 NDP re 2.3(2)P Design values of mechanical resistance Re NOTE 1: See (1) above Note 2. The value recommended in 2.3(1)P, Note 2, applies. NDP re 2.4.2(3) Member analysis Re NOTE 2: As a simplification, the recommended value is fi= 0,6, exc

17、ept for imposed loads according to category E given in EN 1991-1-1:2002 (areas susceptible to accumulation of goods, including access areas) where the recommended value is fi= 0,7. Information on national choice may be found in the National Annex. The reduction factor shall be fi= 0,7 for imposed lo

18、ads according to category E given in DIN EN 1991-1-1; in all other cases fi= 0,6 shall apply. NDP re 4.2.1(1) Simplified rules for determining cross-sectional properties Re NOTE: The recommended procedure is the reduced cross-section method given in 4.2.2. Information on the national choice may be f

19、ound in the National Annex. The calculation methods given in 4.2.2 and 4.2.3 may be applied. NCI re 4.3.5(2) Bracings Regarding the required spacing of connectors, the provisions for nails also apply to staples. NCI re 7.1.2 Detailing of panel connections Regarding the required spacing of connectors

20、, the provisions for nails also apply to staples. NCI re Annex A Parametric fire exposure Annex A may be applied. NCI re Annex B Advanced calculation methods Annex B may be applied. NCI re Annex C Load-bearing floor joists and wall studs in assemblies whose cavities are completely filled with insula

21、tion Annex C may be applied. NCI re Annex D Charring of members in wall and floor assemblies with void cavities Annex D may be applied. NCI re Annex E Analysis of the separating function of wall and floor assemblies Annex E may be applied. DIN EN 1995-1-2/NA:2010-12 6 NCI Bibliography DIN 4102-4, Fi

22、re behaviour of building materials and building components Part 4: Summary and use of classified building materials, building components and special building components DIN 4102-4/A1, Fire behaviour of building materials and building components Part 4: Summary and use of classified building materials, building components and special building components; Amendment A1