1、April 2011 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).ICS 1
2、3.220.50; 91.010.30; 91.080.10!$nm|“1757489www.din.deDDIN EN 1999-1-2/NANational Annex Nationally determined parameters Eurocode 9: Design of aluminium structures Part 1-2: Structural fire designEnglish translation of DIN EN 1999-1-2/NA:2011-04Nationaler Anhang National festgelegte Parameter Eurocod
3、e 9: Bemessung und Konstruktion von Aluminiumtragwerken Teil 1-2:Tragwerksbemessung fr den BrandfallEnglische bersetzung von DIN EN 1999-1-2/NA:2011-04Annexe Nationale Paramtres dtermins au plan national Eurocode 9: Calcul des structures en aluminium Partie 1-2: Calcul du comportement au feuTraducti
4、on anglaise de DIN EN 1999-1-2/NA:2011-04www.beuth.deDocument comprises 4 pagesIn case of doubt, the German-language original shall be considered authoritative.02.12 DIN EN 1999-1-2/NA:2011-04 2 A comma is used as the decimal marker. Foreword This document has been prepared by Working Committee NA 0
5、05-52-22 AA Konstruktiver baulicher Brandschutz (Spiegelausschuss zu Teilbereichen von CEN/TC 250) of the Normenausschuss Bauwesen (Building and Civil Engineering Standards Committee). This standard is the National Annex to DIN EN 1999-1-2:2010-12, Eurocode 9: Design of aluminium structures Part 1-2
6、: Structural fire design. European Standard EN 1999-1-2:2007-02 allows national 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
7、classes from designated classification systems. The relevant parts of the text 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 appl
8、ication of DIN EN 1999-1-2:2010-12, as permitted by Guidance Paper L “Application and use of Eurocodes” of the European Commission, as well as information on the application of the informative annexes of DIN EN 1999-1-2. The provisions of this National Annex are intended to maintain the national saf
9、ety level in terms of fire safety. This National Annex is an integral part of DIN EN 1999-1-2:2010-12. DIN EN 1999-1-2/NA:2011-04 3 NA 1 Scope This National Annex contains national provisions relating to the structural fire design of aluminium structures that are to be taken into consideration when
10、applying DIN EN 1999-1-2:2010-12 in Germany. This National Annex is only valid in conjunction with DIN EN 1999-1-2:2010-12. NA 2 National provisions for the application of DIN EN 1999-1-2 NA 2.1 General DIN EN 1999-1-2:2010-12 refers to the option of choosing Nationally Determined Parameters (NDPs)
11、at the following places in the text: 2.3(1) 2.3(2) 2.4.2(3) 4.2.2.1(1) 4.2.2.3(5) 4.2.2.4(5) In addition NA.2.2 includes non-contradictory information for the application of DIN EN 1999-1-2:2010-12. This information is preceded by the letters “NCI”. For the purposes of this document the terms and de
12、finitions in DIN EN 1999-1-2:2010-12 apply. NA 2.2 National provisions In the following the clauses are numbered as in DIN EN 1999-1-2:2010-12. NCI re 1.2 Normative references DIN EN 1991-1-2/NA: National Annex Nationally determined parameters Eurocode 1: Actions on structures Part 1-2/NA: General a
13、ctions Actions on structures exposed to fire DIN EN 1990/NA: National Annex Nationally determined parameters Eurocode: Basis of structural design DIN EN 1999-1-2:2010-12: Eurocode 9: Design of aluminium structures Part 1-2: Structural fire design NDP re 2.3(1) Design values of material properties Re
14、 NOTE For mechanical properties of aluminium, the partial safety factor for the fire situation see National Annex. The use of M,fi= 1,0 is recommended. For mechanical properties, the partial safety factor M,fi= 1,0 should be applied. NDP re 2.3(2) Design values of material properties Re NOTE For the
15、rmal properties of aluminium, the partial safety factor for the fire situation see National Annex. The use of M,fi= 1,0 is recommended. DIN EN 1999-1-2/NA:2011-04 4 For thermal properties, the partial safety factor M,fi= 1,0 shall be applied. NDP re 2.4.2(3) Analysis of part of the structure Re NOTE
16、 1 The values G, Q,1, fiand may be specified in the National Annex. Recommended values are given in EN 1990. EN 1991-1-2 recommends using 2.1 instead offi. The specifications of DIN EN 1990/NA and DIN EN 1991-1-2/NA shall be used in respect of the values of G, Q,1, fiand . NDP re 4.2.2.1(1) Classifi
17、cation of cross-sections Re NOTE This rule is based on the same relative drop in the 0,2 % proof strength and modulus of elasticity. If the actual drop in modulus of elasticity is taken into account according to Figure 2, the classification of the section changes, and a larger capacity value of the
18、section can be calculated. The National Annex may give provisions to take this into account. In a fire design situation, cross-sections shall be classed as for design according to EN 1999-1-1, 6.1.4. NDP re 4.2.2.3(5) Beams Re NOTE The design resistances given with the formulae (4.5), (4.7) and (4.8
19、) are based on the same relative drop in 0,2 % proof strength and modulus of elasticity at elevated temperatures. If the actual drop in the modulus of elasticity is taken into account larger capacity values can be obtained. The National Annex may give provisions to take this into account. For the de
20、sign moment resistance Mfi,t,Rd, design buckling resistance moment Mb,fi,t,Rdand design shear resistance Vfi,t,Rdof beams in fire design situations, Equations (4.5), (4.7) and (4.8) shall be used without taking into account a more favourable section classification by using the actual drop in modulus
21、 of elasticity. NDP re 4.2.2.4(5) Columns Re NOTE The design resistance given with formula (4.9) is based on the same relative drop in the 0,2 % proof strength and modulus of elasticity. If the actual drop in modulus of elasticity is taken into account, a larger capacity value can be obtained. The N
22、ational Annex may give provisions to take this into account. For the design resistance of columns in design situations, Equation (4.9) shall be used without taking into account a more favourable section classification by using the actual drop in modulus of elasticity. re Annex A Properties of aluminium alloys and/or tempers not listed in EN 1999-1-1 Annex A may be applied. The values stated are informative. re Annex B Heat transfer to external structural aluminium members Annex B may be applied.
