DIN EN 846-9-2016 Methods of test for ancillary components for masonry - Part 9 Determination of flexural resistance and shear resistance of lintels German version EN 846-9 2016《砖石.pdf

1、August 2016 English price group 9No 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 91.080.30!%Ylh“2547369www.din.deDI

2、N EN 846-9Methods of test for ancillary components for masonry Part 9: Determination of flexural resistance and shear resistance of lintels;English version EN 846-9:2016,English translation of DIN EN 846-9:2016-08Prfverfahren fr Ergnzungsbauteile fr Mauerwerk Teil 9: Bestimmung der Biegezug- und Sch

3、ubfestigkeit von Strzen;Englische Fassung EN 846-9:2016,Englische bersetzung von DIN EN 846-9:2016-08Mthodes dessai des composants accessoires de maonnerie Partie 9: Dtermination de la rsistance la flexion et de la rsistance au cisaillement des linteaux;Version anglaise EN 846-9:2016,Traduction angl

4、aise de DIN EN 846-9:2016-08SupersedesDIN EN 846-9:2000-08See start of applicationwww.beuth.deDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.Document comprises 12 pages 07.16 DIN EN 846-9:2016-082 A comma is used as the decimal mar

5、ker. Start of application The start of application of this standard is 2016-08-01. For DIN 846-9:2000-08 there is a transition period ending on 2017-12-31. National foreword This document (EN 846-9:2016) has been prepared by Technical Committee CEN/TC 125 “Masonry” (Secretariat: BSI, United Kingdom)

6、. The responsible German body involved in its preparation was DIN-Normenausschuss Bauwesen (DIN Standards Committee Building and Civil Engineering), Working Committee NA 005-06-04 AA Prfverfahren (SpA zu CEN/TC 125/WG 4). Amendments This standard differs from DIN EN 846-9:2000-08 as follows: a) the

7、standard has been editorially revised. Previous editions DIN EN 846-9: 2000-08 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 846-9 March 2016 ICS 91.060.10; 91.080.30 Supersedes EN 846-9:2000English Version Methods of test for ancillary components for masonry - Part 9: Determination of flexur

8、al resistance and shear resistance of lintels Mthodes dessai des composants accessoires de maonnerie - Partie 9: Dtermination de la rsistance la flexion et de la rsistance au cisaillement des linteaux Prfverfahren fr Ergnzungsbauteile fr Mauerwerk -Teil 9: Bestimmung der Biegezug- und Schubfestigkei

9、t von Strzen This European Standard was approved by CEN on 3 January 2016. 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 bibliog

10、raphical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsib

11、ility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre 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, Former Yugoslav Republi

12、c of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISA

13、TION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 846-9:2016 EEN 846-9:2016 (E) 2 Contents Page European foreword . 3 1 Scope 4

14、 2 Normative references 4 3 Principle . 4 4 Symbols . 4 5 Materials . 4 5.1 Structural shell casing units 4 5.2 Composite lintels . 4 6 Apparatus . 4 7 Sampling . 5 8 Procedure. 5 8.1 General 5 8.2 Method of support . 5 8.3 Conditioning of lintels finished in situ . 5 8.4 Lateral restraint or compos

15、ite action 5 8.5 Loading 5 8.5.1 General requirements . 5 8.5.2 Flexural resistance . 5 8.5.3 Shear resistance. 6 8.5.4 Deflection monitoring . 6 8.6 Test procedure for single, composite and combined lintels . 6 8.6.1 Flexural resistance . 6 8.6.2 Shear resistance. 6 9 Expression of result 6 10 Eval

16、uation of results 7 11 Test report . 7 Bibliography . 10 DIN EN 846-9:2016-08EN 846-9:2016 (E) 3 European foreword This document (EN 846-9:2016) has been prepared by Technical Committee CEN/TC 125 “Masonry”, the secretariat of which is held by BSI. This European Standard shall be given the status of

17、 a national standard, either by publication of an identical text or by endorsement, at the latest by September 2016, and conflicting national standards shall be withdrawn at the latest by December 2017. Attention is drawn to the possibility that some of the elements of this document may be the subje

18、ct of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 846-9:2000. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. Provision has

19、been made in this standard for the restraint of L shape lintels against excessive torsion during testing. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croa

20、tia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and t

21、he United Kingdom. DIN EN 846-9:2016-08EN 846-9:2016 (E) 4 1 Scope This European Standard specifies methods for determining the flexural and shear resistances and load deflection characteristics of single span, single or composite lintels used for supporting uniformly distributed loads over openings

22、 in masonry construction. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

23、EN 845-2, Specification for ancillary components for masonry Part 2: Lintels 3 Principle Specimen lintels are simply supported and subjected to vertically applied loads in order to determine flexural strength, shear resistance and deflection. 4 Symbols B is the length of bearing, (mm) Dcis the total

24、 height of a composite lintel over both tension and compression elements, (mm) D1is the overall depth of a single or combined lintel Leis the effective length (or span), (mm) t is the thickness of supported wall, (mm) W is the applied load, (N) 5 Materials 5.1 Structural shell casing units Structura

25、l shell casing units shall be in accordance with EN 845-2. 5.2 Composite lintels Materials for the compressive elements of composite lintels shall be in accordance with manufacturers specifications. 6 Apparatus 6.1 Test rig capable of withstanding the applied loads without any distress or distortion

26、 that could affect the results of the test. 6.2 Loading system accurate to within 2 %. Where the load is to be applied using weights this should be without shock, and each increment in load and the failure load shall be measured to an accuracy of 2 %. 6.3 Deflection monitoring equipment accurate to

27、within 2 %. DIN EN 846-9:2016-08EN 846-9:2016 (E) 5 7 Sampling The method of sampling shall be in accordance with EN 845-2. The minimum number of specimens shall be three for flexure and a further three for shear. All relevant dimensions and thicknesses shall be measured. 8 Procedure 8.1 General Tes

28、t loads shall be obtained from EN 845-2. 8.2 Method of support Simply support the lintel at each end on a firm base and with a minimum end bearing of 100 mm and in accordance with the manufacturers specifications. The lintel may be bedded on mortar to EN 998-2. 8.3 Conditioning of lintels finished i

29、n situ Build the specimens on a flat horizontal surface. If fresh concrete or mortar is used, take appropriate steps to prevent the test specimen from drying out during the first 3 d after construction, e.g. by covering it with a polyethylene sheet and then leave it uncovered in a laboratory environ

30、ment until tested. 8.4 Lateral restraint or composite action The use of lateral restraint or of composite action arising from a masonry leaf or other infill masonry specified by the manufacturer shall be permitted if included in the design of the lintel. When testing asymmetric lintels, for example

31、those with an L shaped across section, it may be necessary to use composite action and/or clamping the flange to the support in order to avoid excessive and unrealistic torsional effects during loading. 8.5 Loading 8.5.1 General requirements Apply load continuously or in not less than six increments

32、 up to the maximum expected test load. Use any convenient loading rate, such that failure occurs at between 15 min and 30 min after commencing the test. Load lintels designed for use in double leaf walls under the load ratios specified by the manufacturer. 8.5.2 Flexural resistance When testing flex

33、ural resistance, use a uniformly distributed load or alternatively, a series of point loads giving equivalent maximum shear and equivalent bending moment to that obtained from a uniformly distributed load. Point loads should be applied through spreader plates of length between 50 mm and 200 mm. Suit

34、able point loading arrangements are shown in Figures 1 and 2. Transversely across the section, the loads should be applied on the centre line of the position of the leaf or leaves as shown in Figures 1 and 2. The lintel should not be unduly stiffened by the loading arrangement. DIN EN 846-9:2016-08E

35、N 846-9:2016 (E) 6 8.5.3 Shear resistance When testing shear resistance, use a shear load applied to the lintel at a distance from the edge of the support equal to the height of the lintel plus 75 mm (see Figures 1 and 2). The load should be applied through a thick spreader plate of length between 5

36、0 mm and 200 mm. 8.5.4 Deflection monitoring Monitor vertical and horizontal deflection at mid span. Vertical deflection shall be measured at the mid leaf position or in the case of double leaf walls, deflection shall be measured at the mid leaf position of both leaves, and the greater of the two re

37、adings shall be recorded. The average vertical end deflection of the lintel (measured as closely as possible to the bearing) may be deducted from the vertical deflection at mid span. Horizontal deflection shall be measured at the mid height of the lintel. 8.6 Test procedure for single, composite and

38、 combined lintels 8.6.1 Flexural resistance a) Measure all the dimensions of the specimen. b) Mount the lintel on the test apparatus and assemble the loading arrangement as in 8.5.2 and Figure 1 and Figure 2 (as appropriate). c) Apply load to the lintel continuously or in increments as described in

39、8.5.1. d) Monitor the deflection as described in 8.5.4 and plot the deflections after each increment of load to give a load deflection curve. e) Increase load until either (I) flexural failure occurs, or (2) the load at which further net mid-span deflection occurs without increase in load or (3) the

40、 load at which web buckling or shear failure occurs. f) Record the load reached in (e) as the failure load and the mode of failure as described by either e(l), e(2) or e(3) above. Record the failure load, to the nearest 10 N, and note any visible signs of distress in specimen, fixings or supporting

41、member at all stages of the test. 8.6.2 Shear resistance a) Mount the lintel on test apparatus and assemble loading arrangements as in 8.5.3 and Figure 1 or 2 (as appropriate). The lintel length shall exceed 5 times its height. b) Apply load at the rate given in 8.5.1. c) Record the failure load. to

42、 the nearest 10 N. and note any visible signs of distress in specimen, fixings or supporting member at all stages of the test. 9 Expression of result Record the failure load. to the nearest 10 N. and note any visible signs of distress in specimen, fixings or supporting member at all stages of the te

43、st. DIN EN 846-9:2016-08EN 846-9:2016 (E) 7 10 Evaluation of results Calculate the mean failure load. The flexural resistance shall be taken as the mean failure load when following 8.6.1. The shear resistance shall be taken as the mean failure load when following 8.6.2. 11 Test report The test repor

44、t shall include the following information: a) The number, title and date of issue of this European Standard. b) The name of the test laboratory. c) Material specification and dimensions of lintel specimen. d) Details of any lateral restraint or composite action employed. e) Dimensions of end bearing

45、s with a description of any bedding mortar. f) Loading arrangement and positions at which deflection was measured. g) For composite lintels, the dimensions of the masonry and a description of the masonry units and the mortar to the appropriate standards as specified under EN 845-2. h) Load ratios us

46、ed (where relevant). i) For the flexural resistance test, the individual values of (I) the failure load to the nearest 100 N (2) the load deflection curve (3) a description, drawing or photograph of the mode of failure. j) The flexural resistance. k) For the shear resistance test, the individual val

47、ues of (I) the failure load to the nearest 100 N (2) the load deflection curve (3) a description, drawing or photograph of the mode of failure. l) The shear resistance. a) Loading by two point loads DIN EN 846-9:2016-08EN 846-9:2016 (E) 8 b) Loading by four point loads c) Transverse load position d)

48、 Transverse load position e) Test arrangement for shear at end support Key 1 effective length Le 2 centre line of bearing 3 load applied through centre line of wall leaf Figure 1 Examples of loading arrangements for single and combined lintels DIN EN 846-9:2016-08EN 846-9:2016 (E) 9 a) Loading by tw

49、o point loads b) Loading by four point loads c) Transverse load position d) Test arrangement for shear at end support Figure 2 Examples of loading arrangements for composite lintels DIN EN 846-9:2016-08EN 846-9:2016 (E) 10 Bibliography 1 EN 772-1, Methods of test for masonry units Part 1: Determination of compressive strength 2 EN 998-2, Specification for mortar for masonry Part 2: Masonry mortar 3 EN 1015-11, Methods of test for mortar for maso