1、BSI Standards PublicationBS EN 846-9:2016Methods of test for ancillarycomponents for masonryPart 9: Determination of flexural resistanceand shear resistance of lintelsBS EN 846-9:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 846-9:2016. It supersedes BS E
2、N 846-9:2000 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/519, Masonry and associated testing.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the ne
3、cessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 87439 0 ICS 91.060.10; 91.080.30 Compliance with a British Standard cannot confer immunity from legal obligations.This Bri
4、tish Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 846-9:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 846-9 March 2016 ICS 91.060.10; 91.080.30 Sup
5、ersedes EN 846-9:2000English Version Methods of test for ancillary components for masonry - Part 9: Determination of flexural 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 ci
6、saillement des linteaux Prfverfahren fr Ergnzungsbauteile fr Mauerwerk -Teil 9: Bestimmung der Biege- und Schubwiderstandsfhigkeit 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 co
7、nditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exi
8、sts in three official versions (English, French, German). A version in any other language made by translation under the responsibility 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 st
9、andards bodies of Austria, Belgium, Bulgaria, Croatia, 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,
10、Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION 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 reser
11、ved worldwide for CEN national Members. Ref. No. EN 846-9:2016 EBS EN 846-9:2016EN 846-9:2016 (E) 2 Contents Page European foreword . 3 1 Scope 4 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 Sam
12、pling . 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 composite 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
13、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 Evaluation of results 7 11 Test report . 7 Bibliography . 10 BS EN 846-9:2016EN 846-9:2016 (E) 3 European foreword This document (EN 846-9:2016) has been prepa
14、red by Technical Committee CEN/TC 125 “Masonry”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2016, and conflicting national standards shall b
15、e withdrawn at the latest by December 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject 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. Th
16、is document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. Provision has been made in this standard for the restraint of L shape lintels against excessive torsion during testing. According to the CEN/CENELEC Internal Regulations, th
17、e national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvi
18、a, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 846-9:2016EN 846-9:2016 (E) 4 1 Scope This European Standard specifies methods for determining the flexural and shear resistances and
19、load deflection characteristics of single span, single or composite lintels used for supporting uniformly distributed loads over openings in masonry construction. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, o
20、nly the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 845-2, Specification for ancillary components for masonry Part 2: Lintels 3 Principle Specimen lintels are simply supported and subjected to vertically applied
21、loads in order to determine flexural strength, shear resistance and deflection. 4 Symbols B is the length of bearing, (mm) Dcis the total 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
22、span), (mm) t is the thickness of supported wall, (mm) W is the applied load, (N) 5 Materials 5.1 Structural shell casing units Structural 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
23、 with manufacturers specifications. 6 Apparatus 6.1 Test rig capable of withstanding the applied loads without any distress or distortion 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,
24、and each increment in load and the failure load shall be measured to an accuracy of 2 %. 6.3 Deflection monitoring equipment accurate to within 2 %. BS EN 846-9:2016EN 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 th
25、ree for flexure and a further three for shear. All relevant dimensions and thicknesses shall be measured. 8 Procedure 8.1 General Test 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 acc
26、ordance with the manufacturers specifications. The lintel may be bedded on mortar to EN 998-2. 8.3 Conditioning of lintels finished in 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 durin
27、g the first 3 d after construction, e.g. by covering it with a polyethylene sheet and then leave it uncovered in a laboratory environment 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 sp
28、ecified by the manufacturer shall be permitted if included in the design of the lintel. When testing asymmetric lintels, for example 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 unrealisti
29、c torsional effects during loading. 8.5 Loading 8.5.1 General requirements Apply load continuously or in not less than six increments 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 d
30、esigned for use in double leaf walls under the load ratios specified by the manufacturer. 8.5.2 Flexural resistance When testing flexural resistance, use a uniformly distributed load or alternatively, a series of point loads giving equivalent maximum shear and equivalent bending moment to that obtai
31、ned from a uniformly distributed load. Point loads should be applied through spreader plates of length between 50 mm and 200 mm. Suitable 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 le
32、af or leaves as shown in Figures 1 and 2. The lintel should not be unduly stiffened by the loading arrangement. BS EN 846-9:2016EN 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 hei
33、ght of the lintel plus 75 mm (see Figures 1 and 2). The load should be applied through a thick spreader plate of length between 50 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 t
34、he case of double leaf walls, deflection shall be measured at the mid leaf position of both leaves, and the greater of the two readings 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 a
35、t mid span. Horizontal deflection shall be measured at the mid height of the lintel. 8.6 Test procedure for single, composite and 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 a
36、s 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 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
37、 (I) flexural failure occurs, or (2) the load at which further net mid-span deflection occurs without increase in load or (3) the 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
38、) above. 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 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 appropri
39、ate). 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 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 lo
40、ad. to the nearest 10 N. and note any visible signs of distress in specimen, fixings or supporting member at all stages of the test. BS EN 846-9:2016EN 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 foll
41、owing 8.6.1. The shear resistance shall be taken as the mean failure load when following 8.6.2. 11 Test report The test report 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
42、dimensions of lintel specimen. d) Details of any lateral restraint or composite action employed. e) Dimensions of end bearings 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
43、a description of the masonry units and the mortar to the appropriate standards as specified under EN 845-2. h) Load ratios used (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, d
44、rawing or photograph of the mode of failure. j) The flexural resistance. k) For the shear 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. l) The shear resistance. a) Loa
45、ding by two point loads BS EN 846-9:2016EN 846-9:2016 (E) 8 b) Loading by four point loads c) Transverse load position d) 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
46、Examples of loading arrangements for single and combined lintels BS EN 846-9:2016EN 846-9:2016 (E) 9 a) Loading by two 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 B
47、S EN 846-9:2016EN 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 masonary Part 11: Determination of flexura
48、l and compressive strength of hardened mortar This page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and services.BSI is incorporated by Royal Charter. British Standards and other standardization pro
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