DIN EN 1996-3 NA-2012 National Annex - Nationally determined parameters - Eurocode 6 Design of masonry structures - Part 3 Simplified calculation methods for unreinforced masonry s.pdf

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1、January 2012 Translation by DIN-Sprachendienst.English price group 11No 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 91.010.30; 91.080.30!$y7“1862090www.din.deDDIN EN 1996-3/NANational Annex Nationally determined parameters Eurocode 6: Design of masonry structures Part 3: Simplifiedcalculation methods for unreinforced masonry structuresEnglish translation of DIN EN 1996-3/NA:2012-01Nationaler Anhang National fes

3、tgelegte Parameter Eurocode 6: Bemessung und Konstruktion von Mauerwerksbauten Teil 3: VereinfachteBerechnungsmethoden fr unbewehrte MauerwerksbautenEnglische bersetzung von DIN EN 1996-3/NA:2012-01Annexe Nationale Paramtres dtermins au plan national Eurocode 6: Calcul des ouvrages en maonnerie Part

4、ie 3: Mthodes de calculsimplifies pour les ouvrages en maonnerie non armeTraduction anglaise de DIN EN 1996-3/NA:2012-01Supersedes: see belowwww.beuth.deDocument comprises 19 pagesIn case of doubt, the German-language original shall be considered authoritative.03.12Together with DIN EN 1996-1-1:2010

5、-12, DIN EN 1996-1-1/NA:2012-01, DIN EN 1996-2:2010-12, DIN EN 1996-2/NA:2012-01 and DIN EN 1996-3:2010-12 supersedes DIN 1053-1:1996-11;together with DIN EN 1996-1-1:2010-12, DIN EN 1996-1-1/NA:2012-01 and DIN EN 1996-3:2010-12supersedes DIN 1053-100:2007-09DIN EN 1996-3/NA:2012-01 2 A comma is use

6、d as the decimal marker. Contents Page Foreword . 3 NA 1 Scope . 4 NA 2 National provisions for the application of DIN EN 1996-3:2010-12 4 NA 2.1 General . 4 NA 2.2 National provisions. 4 Re 1 General . 4 NCI re 1.1 (6) Scope of Part 3 of Eurocode 6 4 NCI re 1.2 Normative references 4 NCI re 1.6 Sym

7、bols 5 Re 2 Basis of design 5 NDP re 2.3(2)P Verification by the partial factor method . 5 Re 4 Design of unreinforced masonry walls using simplified calculation methods 6 NDP re 4.1(1)P General 6 NCI re 4.3 Simplified calculation method for walls subjected to concentrated loads 11 NCI re 4.5 Simpli

8、fied calculation method for basement walls subject to lateral earch pressure . 12 NCI re Annex A Simplified calculation method for unreinforced masonry walls of buildings not greater than 3 storeys 12 NCI re Annex B Simplified calculation method for the design of internal walls not subject to vertic

9、al loads and with limited lateral load 12 NCI re Annex C Simplified calculation method for the design of walls subjected to uniform lateral design load and no vertical loads . 12 NCI Annex NA.C (normative) Simplified calculation method for the design of walls subjected to uniform lateral design load

10、 and no vertical loads . 13 Re Annex D Simplified method of determining the characteristic strength of masonry 14 DIN EN 1996-3/NA:2012-01 3 Foreword This document has been prepared by Working Committee NA 005-06-01 AA Mauerwerksbau (Masonry structures) of the Normenausschuss Bauwesen (Building and

11、Civil Engineering Standards Committee). This document is the National Annex to DIN EN 1996-3:2010-12, Eurocode 6: Design of masonry structures Part 3:Simplified calculation methods for unreinforced masonry structures. European Standard EN 1996-3:2006 allows national safety parameters, referred to as

12、 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 are identified in the European Sta

13、ndard 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 1996-3:2010-12 National paragraphs are preceded by the letters NA and the paragraph number in b

14、rackets. This National Annex is an integral part of DIN EN 1996-3:2010-12. Amendments This document differs from DIN 1053-1:1996-11 and DIN 1053-100:2007-09 as follows: a) the simplified design method is summarized in Part 3; b) the standard has been restructured; c) reference is made to characteris

15、tic strength values; d) nationally determined parameters (NDPs) have been included in accordance with EN 1996-3; e) a number of provisions from the above standards have been included in this National Annex as non-contradictory complementary information (NCI); Previous editions DIN 4156: 1943-05 DIN

16、1053: 1937x-02, 1952-12, 1962-11 DIN 1053-1: 1974-11, 1990-02, 1996-11 DIN 1053-2: 1984-07, 1996-11 DIN 1053-100: 2004-08, 2006-08, 2007-09 DIN EN 1996-3/NA:2012-01 4 NA 1 Scope This National Annex contains national provisions for the design of buildings and civil engineering works constructed with

17、unreinforced masonry that are to be taken into account when applying DIN EN 1996-3:2010-12 in Germany. This National Annex is only valid in conjunction with DIN EN 1996-3:2010-12. NA 2 National provisions for the application of DIN EN 1996-3:2010-12 NA 2.1 General EN 1996-3:2006 refers to the option

18、 of choosing Nationally Determined Parameters (NDPs) at the following places in the text: 2.3(2)P Verification by the partial factor method; 4.1(1)P Verification of the overall stability of a building; 4.2.1.1(1)P General application conditions; 4.2.2.3(1) Capacity reduction factor; D.1(1) Character

19、istic compressive strength; D.2(1) Characteristic flexural strengths; D.3(1) Characteristic initial shear strength. In addition, NA.2.2 contains non-contradictory complementary information for the application of DIN EN 1996-3:2010-12. This information is preceded by the letters NCI. NA 2.2 National

20、provisions In the following, the clauses are numbered as in DIN EN 1996-3:2010-12. Supplementary clauses have been added as required. Re 1 General NCI re 1.1 (6) Scope of Part 3 of Eurocode 6 (NA.7) The simplified design methods given in EN 1996-3 also apply to the analysis of accidental actions in

21、cases in which wind or snow loads are defined as such actions. NCI re 1.2 Normative references NA DIN EN 998-2, Specification for mortar for masonry Part 2: Masonry mortar NA DIN V 18580, Special masonry mortar NA DIN V 20000-412, Application of building products in structures Part 412: Rules for th

22、e application of masonry mortar in accordance with DIN EN 998-2:2003-09 DIN EN 1996-3/NA:2012-01 5 NCI re 1.6 Symbols Latin letters NA hi is the panel height; NA liis the panel length; NA lf is the span of the adjacent floor; NA a is the bearing length of the floor on the wall; NA Nodis the design v

23、alue of the vertical loads on the bottom of the wall above the floor; NA NDdis the design value of the loads from the floors and joists. Greek letters NA a factor to take account of long-term actions and other long-term effects Re 2 Basis of design NDP re 2.3(2)P Verification by the partial factor m

24、ethod The partial factor for materials Mfor the analysis of the ultimate limit state for persistent, transient and accidental design situations is given in Table NA.1. Table NA.1 Partial factor Mfor materials Material Masonry made with MDesign situation persistent and transient accidental A category

25、 I units and designed mortara1,5 1,3 B category I units and prescribed mortarbas for A as for A C category II units Not applicable to loadbearing masonry.aRequirements for designed mortar are given in DIN EN 998-2 in conjunction with DIN 20000-412 and DIN V 18580. bOnly applies to site-made mortar i

26、n accordance with DIN V 18580. DIN EN 1996-3/NA:2012-01 6 Re 4 Design of unreinforced masonry walls using simplified calculation methods NDP re 4.1(1)P General An analysis of the structural stability is not required if adequate stiffness is provided by floors designed as rigid diaphragms or by adequ

27、ately designed ring beams and if there is a sufficient number of shear walls that are located in both directions of the building and ultimately rest on the foundations, provided that the cross-section of such walls does not undergo any major changes. For masonry made of high-precision elements in wh

28、ich the elements have an overlap lolof less than 0,4 hu, any reduction in the shear resistance due to high surcharges shall be taken into account unless the structural stability of the building is analyzed. Where there is uncertainty as to whether adequate stiffness of the structure is ensured, the

29、shear resistance shall be verified by calculation in accordance with the detailed method described in DIN EN 1996-1-1:2010-12, 6.2, in conjunction with the relevant National Annex. NCI re 4.2.1.1 General conditions The following paragraphs have been added to subclause 4.2.1.1: (NA.2) For solid and p

30、erforated units in accordance with DIN EN 1996-1-1/NA:2012-01, NCI re 3.1.1, NA.5, the simplified calculation methods may be used provided the following criteria and the criteria given in Table NA.2 are satisfied: The height of the building above ground level does not exceed 20 m; for buildings with

31、 pitched roofs, the height can be taken to be the mean of the ridge height and the eaves height above ground level; the span l of the floors resting on the walls does not exceed 6,0 m unless the bending moments at the floor/wall junctions are limited by structural means e.g. by provision of centring

32、 elements. In the case of two-way spanning floors, the smaller span shall be used in the calculations. DIN EN 1996-3/NA:2012-01 7 Table NA.2 Criteria for using the simplified calculation method Wall type Criteria Wall thickness Clear wall height Floor supported by the walls Span Imposed loadat mm hm

33、 lfm qkkN/m 1 Loadbearing internal walls 115 =bhbh (NA.8) where 3, 4are the modification factors in accordance with (NA.5) and (NA.6); 2is a factor by which the effective wall height is reduced according to (NA.8) and (NA.9); b, b is the distance of the free edge from the centre of the restraining w

34、all or the centre-to-centre spacing of the supporting walls in accordance with Figure NA.2; hefis the effective height; h is the clear storey height. (NA.5) In the case of masonry in which the masonry units have an overlap lol/huof not less than 0,4, the modification factors 3and 4shall be taken as

35、1,0. (NA.6) The modification factors for masonry made of high-precision elements with an overlap 0,2 lol/hu 0,4 are given in Table NA.3. DIN EN 1996-3/NA:2012-01 11 Table NA.3 Modification factors 3and 4 for estimating the effective height of walls made of high-precision masonry elements with an ove

36、rlap lol/huof not less than 0,2 but less than 0,4Geometry of the units hu/lu0,5 0,625 1 2 Walls restrained on three edges 31,0 0,90 0,83 0,75 Walls restrained on four edges 41,0 0,75 0,67 0,60 (NA.7) Lateral restraint shall not be assumed if b is greater than 30 t for walls restrained along four edg

37、es and b is greater than 15 t for walls restrained along three edges, where t denotes the thickness of the restrained wall. Such walls shall be treated as walls restrained along two edges. If there are vertical chases or recesses in the middle third of the wall height, causing a reduction in the str

38、ength of the wall, t shall be taken to be the residual thickness of the wall or otherwise a free edge shall be assumed. If the residual thickness of a wall, irrespective of the location of vertical chases or recesses, is less than half the wall thickness or less than 115 mm, a free edge shall be ass

39、umed. Key 1 restrained wall 2 stiffening walls Figure NA.2 Dimensions of b and b for walls restrained on three or four edges respectively (NA.8) The following simplified provisions apply instead of those given in paragraph (2) if the criteria for the application of the simplified calculation method

40、given in 4.2.1.1 are satisfied: 2= 0,75 for wall thicknesses t not exceeding 175 mm; 2= 0,90 for wall thicknesses t greater than 175 mm but not exceeding 250 mm; 2 = 1,00 for wall thicknesses t greater than 250 mm. (NA.9) A reduction in the effective height using 2 1,0 is, however, only permitted if

41、 the bearing length a of the floor on the wall complies with the following values: t 240 mm a 175 mm; t 240mm a = t. NCI re 4.3 Simplified calculation method for walls subjected to concentrated loads (NA.2) DIN EN 1996-1-1:2010-12, 6.1.3, with the relevant NA, applies to solid masonry units in accor

42、dance with DIN EN 1996-1-1/NA:2012-01, NCI re 3.1.1, NA.5. DIN EN 1996-3/NA:2012-01 12 NCI re 4.4.2 Design shear resistance (NA.3) The NDP re 4.1(1)P applies. NCI re 4.5 Simplified calculation method for basement walls subject to lateral earth pressure The following notes have been added to paragrap

43、h (1): NOTE 2 The simplified calculation method is based on an earth pressure coefficient equal to or less than 1/3. NOTE 3 If damp proof courses satisfy the criteria given in DIN EN 1996-1-1/NA, NCI re 3.8.1, their effect may be disregarded. (NA.3) Equations (4.11) and (4.12) take the active earth

44、pressure into account. The provisions for filling and compacting the working space stated in DIN EN 1996-2/NA:2012-01, Annex NA.E (3) apply. Reference should be made to DIN EN 1996-1-1 if other types of compaction or other types of soil are used. (NA.4) The depth of fill heshall not exceed 1,15 h. (

45、NA.5) In Equation (4.12) the value of should be taken as 20 for masonry made with high-precision elements with an overlap 0,2 hu lol 0,4 hu. (NA.6) DIN EN 1996-2/NA:2012-01, Annex NA.E, applies to the execution of basement walls. NCI re Annex A Simplified calculation method for unreinforced masonry

46、walls of buildings not greater than 3 storeys With the exception of A.3, the informative Annex A is adopted as a normative annex. A.3 does not apply in Germany. When applying Annex A, the minimum wall thickness shall be 30 cm and the coefficient cAshall be taken as 0,45 in the case of floors support

47、ed over part of the width of a wall. For floors supported over the full width of a wall, the coefficient cAmay be taken as 0,7 provided that hef/tefdoes not exceed 10. NCI re Annex B Simplified calculation method for the design of internal walls not subject to vertical loads and with limited lateral

48、 load The normative Annex B is adopted as a normative annex without any modifications. It applies to spaces designed for small gatherings of people in which the lateral imposed load on the wall does not exceed 0,5 kN/m in accordance with DIN EN 1991-1-1/NA:2010-12, Table 6.12DE, 1st line, provided t

49、hat solid and perforated masonry units complying with DIN EN 1996-1-1/NA:2012-01, NCI re 3.1.1, (NA.5) are used. NCI re Annex C Simplified calculation method for the design of walls subjected to uniform lateral design load and no vertical loads Annex C has been replaced by the following Annex NA.C: DIN EN 1996-3/NA:2012-01 13 NCI Annex NA.C (normative) Simplified calculation method for the design of walls subjected to uniform lateral design load and no vertical loads (1) A separate analysis i