DIN EN 1991-1-4 NA-2010 National Annex - Nationally determined parameters - Eurocode 1 Actions on structures - Part 1-4 General actions - Wind actions《国家附录 国家制定参数 欧洲规范1 对结构物的作用 第1-.pdf

1、December 2010 Translation by DIN-Sprachendienst.English price group 17No 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 91.010.30!$laX“1736253www.din.deDDIN EN 1991-1-4/NANational Annex Nationally determined parameters Eurocode 1: Actions on structures Part 1-4: General actions Wind actionsEnglish translation of DIN EN 1991-1-4/NA:2010-12Nationaler Anhang National festgelegte Parameter Eurocode 1: Einwirkungen auf

3、 Tragwerke Teil 1-4: Allgemeine Einwirkungen WindlastenEnglische bersetzung von DIN EN 1991-1-4/NA:2010-12Annexe Nationale Paramtres dtermins au plan national Eurocode 1: Actions sur les structures Partie 1-4: Actions gnrales Actions du ventTraduction anglaise de DIN EN 1991-1-4/NA:2010-12Together w

4、ith DINEN1991-1-4:2010-12,supersedesDIN 1055-4:2005-03 andDIN 1055-4 Corrigendum1:2006-03www.beuth.deDocument comprises 45 pagesIn case of doubt, the German-language original shall be considered authoritative.03.12 DIN EN 1991-1-4/NA:2010-12 2 A comma is used as the decimal marker. Contents Page For

5、eword 4 NA.1 Scope 5 NA.2 National provisions for the application of DIN EN 1991-1-4:2010-12 .5 NA.2.1 General 5 NA.2.2 National provisions6 1 General 6 1.1 Scope 6 1.2 Normative references 6 1.5 Design assisted by testing and measurements .6 4 Wind velocity and velocity pressure .6 4.1 Basis for ca

6、lculation 6 4.2 Basic values .7 4.3 Mean wind .7 4.4 Wind turbulence .8 4.5 Peak velocity pressure 8 5 Wind actions .9 5.3 Wind forces 9 6 Structural factor cscd.9 6.1 General 9 6.3 Detailed procedure 9 7 Pressure and force coefficients .9 7.1 General 9 7.2 Pressure coefficients for buildings . 10 7

7、.4 Free-standing walls, parapets, fences and signboards 11 7.6 Structural elements with rectangular sections 11 7.7 Structural elements with sharp edged section 12 7.8 Structural elements with regular polygonal section . 14 7.10 Spheres 14 7.11 Lattice structures and scaffoldings 14 7.13 Effective s

8、lenderness and end-effect factor 14 8 Wind actions on bridges 14 8.1 General . 14 8.2 Choice of the response calculation procedure . 15 8.3 Force coefficients . 15 8.4 Bridge piers . 15 DIN EN 1991-1-4/NA:2010-12 3 Page Annex A (informative) Terrain effects 15 Annex B (informative) Procedure 1 for d

9、etermining the structural factor cscd16 Annex C (informative) Procedure 2 for determining the structural factor cscd16 Annex D (informative) cscdvalues for different types of structures 16 Annex E (informative) Vortex shedding and aeroelastic instabilities. 16 Annex F (informative) Dynamic character

10、istics of structures . 16 NCI Annex NA.A (normative) Wind zone map . 17 NA.A.1 General 17 NA.A.2 Influence of the altitude . 17 NCI Annex NA.B (normative) Influence of terrain roughness, orography and temporary states on the wind actions . 18 NA.B.1 Specification of the terrain categories . 18 NA.B.

11、2 Transitions between the terrain categories . 19 NA.B.3 Gust velocity pressure for buildings and structural elements not susceptible to vibrations . 20 NA.B.3.1 Procedures for determining the gust velocity pressure 20 NA.B.3.2 Simplified gust velocity pressure assumptions for buildings with heights

12、 of up to 25 m above ground level 20 NA.B.3.3 Height-dependent gust velocity pressure for the normal case . 21 NA.B.4 Influence of orography . 23 NA.B.4.1 Determining the influence of orography 23 NA.B.4.2 Numerical calculation of the orography coefficients . 23 NA.B.5 Reduction of the velocity pres

13、sure for temporary states 23 NCI Annex NA.C (normative) Determination of the structural factor and evaluation of the vibration susceptibility 25 NA.C.1 Determination of the structural factor 25 NA.C.1.1 General 25 NA.C.1.2 Wind turbulence . 26 NA.C.1.3 Structural factor cscd28 NA.C.1.4 Number of loa

14、ds for dynamic response . 28 NA.C.1.5 Service displacement and accelerations for serviceability assessments of a vertical structure 29 NA.C.2 Criterion for the susceptibility to vibrations 29 NCI Annex NA.D (normative) Vortex shedding . 31 NCI Annex NA.E (informative) Aeroelastic instabilities 32 NA

15、.E.1 Galloping and interference galloping . 32 NA.E.2 Divergence and flutter 32 NA.E.2.1 General 32 NA.E.2.2 Divergence velocity 32 NDP Annex NA.F (normative) Dynamic characteristics of structures . 35 NCI Annex NA.N (informative) Wind actions on bridges 36 NA.N.1 General 36 NA.N.2 Wind actions to b

16、e taken into account . 36 NCI Annex NA.V (normative) Pressure coefficients for canopies . 43 NCI Bibliography 45 DIN EN 1991-1-4/NA:2010-12 4 Foreword This document has been prepared by Working Committee NA 005-51-02 AA Einwirkungen auf Bauten (Sp CEN/TC 250/SC 1) of the Normenausschuss Bauwesen (Bu

17、ilding and Civil Engineering Standards Committee). This document is the National Annex to DIN EN 1991-1-4:2010-12, Eurocode 1: Actions on structures Part 1-4: General actions Wind actions. European Standard EN 1991-1-4 allows national safety parameters, referred to as Nationally Determined Parameter

18、s (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 are identified in the European Standard by references to the possi

19、bility of national choice and are listed in Clause NA.2.1. This National Annex also includes non-contradictory complementary information (NCl) for the application of DIN EN 1991-1-4:2010-12. This National Annex is an integral part of DIN EN 1991-1-4:2010-12. Together, DIN EN 1991-1-4:2010-12 and thi

20、s National Annex DIN EN 1991-1-4/NA:2010-12 supersede DIN 1055-4:2005-03. Amendments This document differs from DIN 1055-4:2005-03 and DIN 1055-4 Corrigendum 1:2006-03 as follows: a) Provisions from DIN 1055-4 have been incorporated which are to be taken into account when applying DIN EN 1991-1-4 na

21、tionally. Previous editions DIN 1055-4: 1938xxx-06, 1977-05, 1986-08, 2005-03 DIN 1055-4 Supplement: 1939-06, 1941-02 DIN 1055-4/A1: 1987-06 DIN 1055-4 Corrigendum 1: 2006-03 DIN EN 1991-1-4/NA:2010-12 5 NA.1 Scope This National Annex contains national “guidance on the determination of natural wind

22、actions for the structural design of buildings and civil engineering works for each of the loaded areas under consideration”, that is to be taken into consideration when applying DIN EN 1991-1-4:2010-12 in Germany. This National Annex is only valid in conjunction with DIN EN 1991-1-4:2010-12. NA.2 N

23、ational provisions for the application of DIN EN 1991-1-4:2010-12 NA.2.1 General DIN EN 1991-1-4:2010-12 refers to the option of choosing Nationally Determined Parameters (NDPs) at the following places in the text: 1.1(11) Note 1 1.5(2) 4.1(1) 4.2(1)P Note 2 4.2(2)P Notes 1, 2, 3, and 5 4.3.1(1) Not

24、es 1 and 2 4.3.2(1) 4.3.2(2) 4.3.3(1) 4.3.4(1) 4.3.5(1) 4.4(1) Note 2 4.5(1) Notes 1 and 2 5.3(5) 6.1(1) 6.3.1(1) Note 3 6.3.2(1) 7.1.2(2) 7.1.3(1) 7.2.1(1) Note 2 7.2.2(1) 7.2.2(2) Note 1 7.2.8(1) 7.2.9(2) 7.2.10(3) Notes 1 and 2 7.4.1(1) 7.4.3(2) 7.6(1) Note 1 7.7(1) Note 1 7.8(1) 7.10(1) Note 1 7

25、.11(1) Note 2 7.13(1) 7.13(2) 8.1(1) Notes 1 and 2 8.1(4) 8.1(5) 8.2(1) Note 1 8.3(1) 8.3.1(2) 8.3.2(1) 8.3.3(1) Note 1 8.3.4(1) 8.4.2(1) Notes 1 and 2 A.2(1) E.1.3.3(1) E.1.5.1(1) Notes 1 and 2 E.1.5.1(3) E.1.5.2.6(1) Note 1 E.1.5.3(2) Note 1 E.1.5.3(4) E.1.5.3(6) E.3(2) In addition, NA 2.2 include

26、s non-contradictory complementary information for the application of DIN EN 1991-1-4:2010-12. This information is preceded by the letters “NCI”. 1.1(2) 1.1(6) 1.2 7.2.3 Annexes A to V Bibliography. DIN EN 1991-1-4/NA:2010-12 6 NA.2.2 National provisions In the following, the clauses are numbered as

27、in DIN EN 1991-1-4:2010-12. Supplementary clauses have been added as required. 1 General 1.1 Scope NCI re 1.1(2) Due to the wind profile applicable in Germany, this standard may be applied to buildings with heights of up to 300 m. NCI re 1.1(6) The informative Annexes B and C are not applicable in G

28、ermany. Annex NA.C applies instead. NDP re 1.1(11), Note 1 This standard applies to buildings with heights of up to 300 m. This standard does not give any guidance for the consideration of gust-induced vibrations if higher modes of oscillation provide a significant contribution. This standard does n

29、ot give any rules for the determination of wind actions on small-format, back-ventilated roof and wall claddings. For these, reference is made to the relevant technical rules. 1.2 Normative references NCI re 1.2 NA DIN EN 1991-1-4, Eurocode 1: Actions on structures Part 1-4: General actions Wind act

30、ions NA DIN EN 12811-1:2004-03, Temporary works equipment Part 1: Scaffolds Performance require-ments and general design 1.5 Design assisted by testing and measurements NDP re 1.5(2) If wind tunnel tests are used, then a suitable boundary layer wind tunnel (e.g. in accordance with WTG-Merkblatt ber

31、Windkanalversuche in der Gebudeaerodynamik of the Windtechnologische Gesellschaft WTG e.V.) shall be used, in which the profiles of the mean wind velocity and turbulence intensity are modelled with sufficient accuracy. The measurements and analysis shall be carried out using suitable procedures. 4 W

32、ind velocity and velocity pressure 4.1 Basis for calculation NDP re 4.1(1) Data on mean wind velocity vmfor the peak or gust velocity pressure and on the turbulence intensity applicable to Germany are given in Annex NA.B of this National Annex. DIN EN 1991-1-4/NA:2010-12 7 4.2 Basic values NDP re 4.

33、2(1)P, Note 2 The basic wind velocities for Germany are given in the wind zone map in Annex NA.A of this National Annex. NDP re 4.2(2)P, Note 1 The influence of altitude is taken into account in accordance with Annex NA.A. NDP re 4.2(2)P, Note 2 The recommended value is adopted, i.e. the full numeri

34、cal value of the velocity pressure shall be used for the wind load, irrespective of the direction. The influence of the wind direction may be considered in greater detail if sufficiently reliable statistical data are available. NDP re 4.2(2)P, Note 3 The recommended value is adopted. NDP re 4.2(2)P,

35、 Note 5 In Germany, the following values apply: K = 0,1 and n = 1. For Equation (4.2), p 0,02 unless shorter service lives justify higher values. 4.3 Mean wind 4.3.1 Variation with height NDP re 4.3.1(1)P, Note 1 The basic wind velocity given in Annex NA.A does not include any influence of terrain o

36、rography. If terrain orography is required to be considered, then it is taken into account by the orography factor coin accordance with DIN EN 1991-1-4:2010-12, A.3. NDP re 4.3.1(1)P, Note 2 Annex NA.A includes the basic wind velocity vb. Tables NA.B.2 and NA.B.4 in Annex NA.B specify the mean wind

37、velocity increasing with height z. 4.3.2 Terrain roughness NDP re 4.3.2(1) The recommended procedure is not applicable. In Germany, the power-law index profile applies instead of the logarithmic wind profile used in Equation (4.4). This gives correct values for the wind velocity even for heights z b

38、etween 200 m and 300 m. The roughness factor crfor the four categories of terrain given in Annex NA.B is: =1010ln05,019,0)10()(007,00mmrzzzvzvc (NA.1) DIN EN 1991-1-4/NA:2010-12 8 where is the profile exponent of the mean wind velocity given in Table NA.B.1; z0is the roughness length given in Table

39、NA.B.1; z is the height above the ground, in m. No consideration shall be given to terrain category 0 in Germany. NDP re 4.3.2(2) In Germany, the influence of the terrain roughness is assessed in accordance with Annex NA.B. 4.3.3 Terrain orography NDP re 4.3.3(1) This procedure is adopted. 4.3.4 Lar

40、ge and considerably higher neighbouring structures NDP re 4.3.4(1) No further national provisions are specified. 4.3.5 Closely spaced buildings and obstacles NDP re 4.3.5(1) No further national rules are specified. The gust velocity pressure profile may be shifted upwards by an amount equal to the d

41、isplacement height. Below displacement height a constant velocity value applies as for height hdis. 4.4 Wind turbulence NDP re 4.4(1), Note 2 Equation (4.7) is not applicable due to the fact that in Germany the wind profile is required to be taken into account. The turbulence intensity and the gust

42、velocity pressure shall be calculated in accordance with Tables NA.B.2 and NA.B.4 in Annex NA.B. If the influence of terrain orography is to be taken into account, then Annex NA.B.4 applies. 4.5 Peak velocity pressure NDP re 4.5(1), Note 1 Equation (4.8) is not applicable owing to the wind profile r

43、equired to be taken into account in Germany. The turbulence intensity and the gust velocity pressure shall be calculated in accordance with Annex NA.B, Tables NA.B.2 and NA.B.4. NDP re 4.5(1), Note 2 The recommended value given in DIN EN 1991-1-4 applies. DIN EN 1991-1-4/NA:2010-12 9 5 Wind actions

44、5.3 Wind forces NDP re 5.3(5) The effect may generally be taken into account. This shall be based on verified findings (e.g. from wind tunnel tests). The recommendation given in the note to 7.2.2(3) shall not be applied. 6 Structural factor cscd6.1 General NDP re 6.1(1) Equations (6.2) and (6.3) sha

45、ll not be applied. The procedure specified in the national provisions given in Annex NA.C shall be applied. 6.3 Detailed procedure 6.3.1 Structural factor cscdNDP re 6.3.1(1), Note 3 The procedure given in Annex NA.C shall be used. It shall be applied if the cdvalue is greater than 1,1. A simple cri

46、terion is given in Annex NA.C.2. 6.3.2 Serviceability assessments NDP re 6.3.2(1) The procedure given in Annex NA.C shall be used. 7 Pressure and force coefficients 7.1 General 7.1.2 Asymmetric and counteracting pressures and forces NDP re 7.1.2(2) The recommended procedure is used. In addition, the

47、 load case constituting full wind force without torsion should be examined. 7.1.3 Effects of ice and snow NDP re 7.1.3(1) Since modification of the reference area by ice or snow is a temporary state, the velocity pressure may be reduced. However, if a reduction is applied, then the combination facto

48、rs given in DIN EN 1990 are not permitted to be applied at the same time. For further information see Annex NA.C. DIN EN 1991-1-4/NA:2010-12 10 7.2 Pressure coefficients for buildings 7.2.1 General NDP re 7.2.1(1), Note 2 The recommended procedure given in DIN EN 1991-1-4 applies. 7.2.2 Vertical walls of rectangular plan buildings NDP re 7.2.2(1) The provisions of DIN EN 1991-1-4 apply.