1、November 2012 Translation by DIN-Sprachendienst.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).IC
2、S 91.080.30!$QH“1924637www.din.deDDIN EN 846-5Methods of test for ancillary components for masonry Part 5: Determination of tensile and compressive load capacity and loaddisplacement characteristics of wall ties (couplet test);English version EN 846-5:2012,English translation of DIN EN 846-5:2012-11
3、Prfverfahren fr Ergnzungsbauteile fr Mauerwerk Teil 5: Bestimmung der Zug- und Drucktragfhigkeit sowie der Steifigkeit vonMauerankern (Steinpaar-Prfung);Englische Fassung EN 846-5:2012,Englische bersetzung von DIN EN 846-5:2012-11Mthodes dessai des composants accessoires de maonnerie Partie 5: Dterm
4、ination de la charge admissible la traction et la compression, et descaractristiques effort-dformation des attaches murales;Version anglaise EN 846-5:2012,Traduction anglaise de DIN EN 846-5:2012-11SupersedesDIN EN 846-5:2000-08www.beuth.deIn case of doubt, the German-language original shall be cons
5、idered authoritative.Document comprises 13 pages 10.12 DIN EN 846-5:2012-11 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 125 “Masonry” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparati
6、on was the Normenausschuss Bauwesen (Building and Civil Engineering Standards Committee), Working Committee NA 005-06-04 AA Prfverfahren (SpA zu CEN/TC 125/WG 4). Amendments This standard differs from DIN EN 846-5:2000-08 as follows: a) the figures have been editorially revised; b) normative referen
7、ces in Subclause 4.2 “Mortar” have been updated; c) in Subclause 4.3 “Wall ties”, the minimum number of specimens has been increased to 20 (instead of 12); d) specifications relating to Clause 7 “Procedure” have been modified; e) further information has been included in Clause 9 “Test report”. Previ
8、ous editions DIN EN 846-5: 2000-08 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 846-5 August 2012 ICS 91.080.30 Supersedes EN 846-5:2000English Version Methods of test for ancillary components for masonry - Part 5: Determination of tensile and compressive load capacity and load displacement
9、characteristics of wall ties (couplet test) Mthodes dessai des composants accessoires de maonnerie - Partie 5: Dtermination de la charge admissible la traction et la compression, et des caractristiques effort-dformation des attaches murales Prfverfahren fr Ergnzungsbauteile fr Mauerwerk - Teil 5: Be
10、stimmung der Zug- und Drucktragfhigkeit sowie der Steifigkeit von Mauerankern (Steinpaar-Prfung) This European Standard was approved by CEN on 11 February 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
11、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 exists in three official versions (English, Fr
12、ench, 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 standards bodies of Austria, Belgium, Bulgari
13、a, 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, Slovenia, Spain, Sweden, Switzerland, Turke
14、y and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 84
15、6-5:2012: EEN 846-5:2012 (E) 2 Contents Page Foreword . 31 Scope 42 Normative references . 43 Principle . 44 Materials . 54.1 Masonry units 54.1.1 Sampling and conditioning 54.1.2 Testing 54.2 Mortar . 54.3 Wall ties 55 Apparatus 56 Preparation and storage of test specimens . 66.1 General . 66.2 Pre
16、paration 66.3 Length of embedment of ties in mortar beds . 76.4 Storage . 77 Procedure 77.1 Setting specimen in test machine . 77.2 Test environment 77.3 Loading 78 Expression of results 89 Test report . 8DIN EN 846-5:2012-11 EN 846-5:2012 (E) 3 Foreword This document (EN 846-5:2012) has been prepar
17、ed 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 February 2013, and conflicting national standards shall be wit
18、hdrawn at the latest by February 2013. 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 846-5:2000. The pri
19、ncipal changes in this document form the previous edition relate to the tie position, the number of ties to be tested, the location of the clamp during testing and the treatment of slope and movement tolerant ties. Ties are to now be placed at the minimum declared embedment length rather than a leng
20、th calculated from the tie length and design cavity width. Ten ties are tested in tension and ten in compression. In the compression tests the ties are loaded over an extended cavity, or alternatively provision is made for evaluating the cavity section by calculation. Where ties are designed to tole
21、rate either an induced slope or movement then prior to test they are cycled fifty times through the slope or movement for which they have been designed. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this Euro
22、pean Standard: 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, Slo
23、venia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 846-5:2012-11 EN 846-5:2012 (E) 4 1 Scope This European Standard specifies the couplet method for determining the tensile and compressive load capacity and load displacement characteristics of wall ties embedded in mortar joint
24、s. The test is intended for ties used for connecting together two leaves of masonry and for the mortar-bedded end of ties for connecting masonry leaves to other structures. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indisp
25、ensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 771-1, Specification for masonry units Part 1: Clay masonry units EN 771-2, Specification for masonry units
26、Part 2: Calcium silicate masonry units EN 771-3, Specification for masonry units Part 3: Aggregate concrete masonry units (Dense and lightweight aggregates) EN 771-4, Specification for masonry units Part 4: Autoclaved aerated concrete masonry units EN 771-5, Specification for masonry units Part 5: M
27、anufactured stone masonry units EN 771-6, Specification for masonry units Part 6: Natural stone masonry units EN 772-1, Methods of test for masonry units Part 1: Determination of compressive strength EN 772-10, Methods of test for masonry units Part 10: Determination of moisture content of calcium s
28、ilicate and autoclaved aerated concrete units EN 845-1, Specification for ancillary components for masonry Part 1: Wall ties, tension straps, hangers and brackets EN 998-2, Specification for mortar for masonry Part 2: Masonry mortar EN 1015-3, Methods of test for mortar for masonry Part 3: Determina
29、tion of consistence of fresh mortar (by flow table) EN 1015-7, Methods of test for mortar for masonry Part 7: Determination of air content of fresh mortar EN 1015-11, Methods of test for mortar for masonry Part 11: Determination of flexural and compressive strength of hardened mortar 3 Principle The
30、 tie is embedded in a mortar typical of the type for which the tie is specified between a pair (couplet) of masonry units. The tie is then subjected to tension or compression until failure occurs. DIN EN 846-5:2012-11 EN 846-5:2012 (E) 5 4 Materials 4.1 Masonry units 4.1.1 Sampling and conditioning
31、Masonry units shall be as specified in accordance with EN 771. All of the masonry units for individual tests or for making the couplet specimens shall be taken from the same consignment. The conditioning of masonry units shall be as specified. Record the method of conditioning the masonry units prio
32、r to laying. Measure the moisture content by mass of autoclaved aerated concrete and calcium silicate units in accordance with EN 772-10. Record the age of non-autoclaved concrete units at the time of testing the masonry specimens. 4.1.2 Testing Determine the compressive strength of a sample of maso
33、nry units using the method given in EN 772-1. For non-autoclaved concrete units, determine the compressive strength at the time of testing the couplet specimens. 4.2 Mortar The mortar, its mixing procedure and its flow value shall conform to the requirements of EN 998-2, unless otherwise specified a
34、nd these shall be reported in the test report. Take representative samples of fresh mortar from the masons board to make mortar prisms to determine the flow value in accordance with EN 1015-3, and to determine the air content in accordance with EN 1015-7. Use the prism specimens to determine the mea
35、n compressive strength at the time of testing of the masonry specimens in accordance with EN 1015-11. 4.3 Wall ties The method of sampling shall be in accordance with EN 845-1. The minimum number of specimens shall be 20, but this number shall be doubled where both ends of asymmetrical ties are test
36、ed separately. 5 Apparatus 5.1 A simple support for the couplet specimen so that the reaction (e.g. hardwood bearer-see Figure 4) is no closer to the centre line of the tie than 75 mm. The support system shall not apply any restraint against splitting of the specimen, apart from the friction generat
37、ed at the reaction due to the applied load. A possible arrangement is shown in Figure 4 for tension and in Figure 4 for compression. In cases where slope tolerant ties are required to be tested at their maximum design slope the load should be applied to the tie end via a rigid loading assembly and t
38、he support arrangement should allow the specimen to be offset from the machine axis by the specified offset distance. DIN EN 846-5:2012-11 EN 846-5:2012 (E) 6 5.2 A means of applying and maintaining a constant compressive stress of 0,1 N/mm2 0,01 N/mm2on the couplet. A possible device is shown in Fi
39、gure 2. NOTE The device is optional where ultimate failure does not occur by splitting apart of the couplet. 5.3 A clamp for gripping the free end of the tie and applying a load. Typical clamps are shown in Figure 3. NOTE Movement of the specimen within the clamp will invalidate the deformation meas
40、urement and therefore specially designed clamps may be needed for particular tie forms. The use of low melting point alloys to act as chucks is recommended. Some frame ties will require special clamps. 5.4 A test machine capable of applying the load without distortion such that the maximum load read
41、ing occurs above 20 % of the full scale reading. The load shall be measured using a load cell device having a digital or analogue readout with a maximum error of 2 % of the full scale reading. The system shall apply an axial force to the specimen. The system or universal test machine shall be fitted
42、 with a rigid connection between the clamp which is used to apply tension or compression loads and the machine cross-head or loading device, i.e. any pivot ball joint or universal joint connections to the load cells shall be locked. 5.5 A means of measuring displacement of the couplet in relation to
43、 the clamp using at least two symmetrically placed dial gauges or electrical linear displacement transducers as shown in Figure 1. Displacement shall be measured to the nearest 0,01 mm. Displacement shall not be measured by recording the cross-head travel of the test machine. 5.6 For polymer-based (
44、plastics) products only, a controlled temperature and humidity chamber or room which may be a chamber which fits over the specimen. 6 Preparation and storage of test specimens 6.1 General Ten couplet specimens each for compression and tensile testing shall be prepared with the ties embedded to the d
45、eclared minimum embedment length. The number of specimens for each shall be doubled where both ends of asymmetrical ties are tested separately. 6.2 Preparation Build the specimens on a flat horizontal surface, and lay the ties in the bed joints between two masonry units by normal bricklaying techniq
46、ues, using a jig to ensure axial alignment of each tie. A typical jig is shown in Figure 4. Align the two stretcher faces to be used for reaction to give a plane surface. Strike off the mortar flush with the faces of the specimen. General purpose and lightweight masonry mortar joints shall be betwee
47、n 8 mm and 15 mm thick. Thin layer mortar joints shall be between 1 mm and 3 mm thick. Record the position of the ties in relation to any perforations, frogs or other depressions of the bed face of the units. Deviations from axiallity of the tie in a couplet is liable to reduce its measured strength
48、. This effect may be assessed by measuring the compressive strength of offset ties in a suitable test machine. DIN EN 846-5:2012-11 EN 846-5:2012 (E) 7 6.3 Length of embedment of ties in mortar beds For symmetrical ties, physically identical at each end and designed or intended to be used in mortar at each end, the length of embedment shall be the declared minimum embedment length. For asymmetrical ties either of a different physical design at each end
