1、BRITISH STANDARD BS 5080-2: 1986 Incorporating Amendment No.1 Methods of test for Structural fixings in concrete and masonry Part 2: Method for determination of resistance to loading in shear UDC 693.1/.5:691.88:620.176.24BS5080-2:1986 This British Standard, having been prepared under the directiono
2、f the Civil Engineering and Building Structures Standards Committee, was published under the authority ofthe Board of BSI and comes intoeffect on 31December1986 BSI 01-2000 The following BSI references relate to the work on this standard: Committee referenceCSB/31 Draft for comment84/11024DC ISBN 0
3、580 15130 1 Committees responsible for this BritishStandard The preparation of this British Standard was entrusted by the Civil Engineering and Building Structures Standards Committee (CSB/-) to Technical Committee CSB/31, upon which the following bodies were represented: Association of Building Com
4、ponent Manufacturers Ltd. Brick Development Association British Precast Concrete Federation Ltd. Cement and Concrete Association Concrete Society Construction Fixings Association District Surveyors Association Federation of British Hand Tool Manufacturers Greater London Council Institution of Civil
5、Engineers Institution of Structural Engineers National Association of Scaffolding Contractors Stainless Steel Fabricators Association of Great Britain Suspended Access Equipment Manufacturers Association Suspended Ceilings Association Amendments issued since publication Amd. No. Date of issue Commen
6、ts 7602 July1993 Indicated by a sideline in the marginBS5080-2:1986 BSI 01-2000 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 Principle 1 4 Apparatus 1 5 Base materials 2 6 Installation of fixing 3 7 Procedure 3 8 Presentation of results and calcul
7、ation 4 9 Test report 5 Figure 1 Outside diameter of fixing 7 Figure 2 Suitable form of loading apparatus 8 Figure 3 Minimum spacing of anchors 9 Figure 4 Types of fixing to show the dimensions required for reporting their description 9 Figure 5 Undercut anchors alternative profiles of undercuts in
8、the base material 11 Publications referred to Inside back coverBS5080-2:1986 ii BSI 01-2000 Foreword This Part of BS5080 has been prepared under the direction of the Civil Engineering and Building Structures Standards Committee and describes a method for conducting tests under shear forces on struct
9、ural fixings installed in concrete or masonry materials used in building and civil engineering construction. A structural fixing joins, supports or retains components, and may be defined as one that has been designed to resist some form of loading, since its failure will have structural significance
10、. This method of test applies to a fixing installed according to the suppliers recommended procedure in a solid base material. It is a test of the composite assembly comprising the fixing and the base material and not just of the fixing itself. Failure of a fixing assembly under a shear force may be
11、 due to failure of the material from which the fixing has been manufactured or failure of the base material in which it has been installed. The test is not intended for fixings comprising small plugs of metal, plastics or fibrous composition which are used in conjunction with woodscrews, or for fixi
12、ngs that pass through the base material (such as those for use with thin rigid sheet materials for walls, roofs or partitions) or for cavity fixings for use with hollow clay or concrete block masonry. Displacement fixings,i.e.pins or studs inserted by a cartridge-operated tool, are not included as t
13、he method of test is not appropriate to their use. However, should a design demand structural considerations and testing, the procedures given in this standard should be followed as far as possible. The standard relates to the method of test only; it is not a performance standard. It has to be stres
14、sed that any recommendations on the interpretation of the results of tests for the purposes of design, selection or use of fixing are outside the scope of the standard. If the method in this standard is used for proof testing the applied load and/or relative movement limits should be specified by th
15、e user. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document co
16、mprises a front cover, an inside front cover, pagesi andii, pages1to12, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS5080-2:1986 BSI 01-20
17、00 1 1 Scope 1.1 General This Part of BS5080 describes a method for conducting tests under shear force on structural fixings installed in concrete or masonry used in building and civil engineering. 1.2 Type of test The test consists of applying a shear force to a fixing installed in a solid base mat
18、erial. 1.3 Type of fixings The test is intended for expanded and undercut anchors, bonded fixings, cast-in fixings and channel inserts. 1.4 Construction materials The materials in which these fixings may be installed are as follows: a) concrete; b) natural stone; c) cast stone; d) brick or block mas
19、onry. 1.5 Application of test There are two distinct situations in which the test can be applied. These are as follows. a) For comparative or reference purposes, for which a standard specimen of base material is specified (see5.1). b) For a specific application, for which the base material should be
20、 appropriate to the intended use of the fixing. In this situation the base material may be either a specimen manufactured for the purpose or a representative section of the base material in place (see5.2). NOTEThe titles of the publications referred to in this standard are listed on the inside back
21、cover. 2 Definitions For the purposes of this Part of BS5080, the definitions given in BS5080-1 apply together with the following. 2.1 expanded anchors anchors held in drilled holes by friction or wedging action 2.2 bonded fixings fixings held in drilled holes by grout or other bonding material 2.3
22、cast-in fixings anchor bolts and sockets cast into the material during construction 2.4 channel inserts slots and channels cast into the material during construction 2.5 undercut anchors anchors held in drilled holes by interlocking in under-reamed shapes during drilling or setting (seeFigure 5) 3 P
23、rinciple The principle of the test is the subjection of a composite assembly consisting of a structural fixing installed in solid base material to a shear force applied through the structural fixing until failure occurs. Measurement of the load applied is carried out to determine the strength of the
24、 assembly. 4 Apparatus 4.1 Shear testing apparatus, being a loading frame incorporating a means of applying load through a block of steel having a diameter equal to5d and a thickness equal tod +0.8mm, where d is the outside diameter of the part of the fixing that projects from the surface of the bas
25、e material (seeFigure 1). There shall be a hole in the block, located in the centre, the diameter being such that the clearance for the stud or bolt of the fixing is in accordance with BS4186, medium fit. The block of steel shall comply with either: a) grade665M17of BS970-1, case hardened0.5mm to0.8
26、mm deep with hardness HV700; or b) grade43A of BS4360 and bushed with a hardened steel sleeve having the same specification as given ina). The bush shall have a minimum wall thickness of3mm. The edge of the hole in the block or the bush shall be radiused at each end,0.4mm radius. After each series o
27、f tests the block and bush shall be visually inspected and shall be replaced if any wear or deformation is observed. An example of a suitable form of apparatus is shown inFigure 2.BS5080-2:1986 2 BSI 01-2000 4.2 Measuring equipment, to measure the relative movement between the fixing and the base ma
28、terial to an accuracy of0.02mm. 4.3 Load measuring device, being a pressure gauge, proving ring, load cell or other suitable device, capable of measuring to an accuracy of5%. 4.4 Structural fixings, as appropriate. 4.5 Drill bits, or other devices used to install the structural fixings. 4.6 Mould, i
29、f required to cast standard specimen of base material (see5.1). 5 Base materials 5.1 Standard specimen of base material NOTEThe dimensional criteria given in5.1 are intended to ensure that the behaviour under test of any one fixing does not affect that of adjacent fixings. The dimensions given here
30、are not to be taken in any sense as guidance for field installation. 5.1.1 General. The standard specimen of base material shall be manufactured from concrete complying with the dimensional and casting requirements of5.1.2 and5.1.3. 5.1.2 Concrete. The concrete from which the standard specimen is pr
31、epared shall have the following mix proportions, compaction and curing treatments. a) Ordinary Portland cement (complying withBS12):100kg. b) Total aggregate (complying with BS882):510kg (dry weight) composed as follows. 1) Coarse aggregate: flint gravel graded20mm to5mm. 2) Fine aggregate: natural
32、sand as a proportion of the total aggregate content of one of the following: i) TypeC: 40%; or ii) TypeM: 35%; or iii) TypeF: 30%. c) Water content: the water content of each batch shall be adjusted to give a concrete of medium workability, equivalent to a slump of25mm to75mm when determined in acco
33、rdance with BS1881-102. d) Compaction: mechanical vibration (applied externally or internally) shall be used to compact the concrete. e) Curing: the specimen(s) shall be stored in moist air of at least90% r.h. and20 C for the first2days after casting. NOTE 1The quantities and proportions of material
34、s given will produce approximately0.28m 3of fully compacted concrete. The batch weights should be calculated to suit the size of the mixer and the actual quantity of concrete required. NOTE 2This concrete mix complies with theC25P ordinary prescribed mix of BS5328. Any reinforcement in the standard
35、specimen shall be so positioned as to offer no additional strength in the zone of interaction between the concrete and the fixings. The density and compressive strength of the concrete from each batch shall be determined at the time of testing in accordance with BS1881-114 andBS1881-116 respectively
36、. 5.1.3 Specimen size. It shall be acceptable for a single specimen to be used for the installation and testing of any number of fixings, provided that it complies with the dimensional conditions specified in1) to3), which are based on characteristic dimensionA of the fixing, defined as follows. a)
37、expanding and undercut anchors seeFigure 4(a): A =the hole diameter or one-quarter of the embedded depth, whichever isgreater. b) bonded fixings seeFigure 4(b): A =the maximum diameter of the fixing or one-quarter of the embedded depth, whichever is the greater. c) cast-in fixings seeFigure 4(c): A
38、=the maximum dimension perpendicular to the axis or one-quarter of the maximum embedded depth, whichever is the greater. d) channel inserts seeFigure 4(d): the dimensions of the specimen shall, as far as possible, comply with the criteria for other fixings and allowance shall be made for projecting
39、ties or lugs. NOTEIt is not practicable to define a characteristic dimensionA for channel inserts. The dimensions of the specimen shall comply with the following. 1) There shall be a minimum of4A below the embedded depth of the fixing,D. 2) There shall be a minimum of8A between the centre of any fix
40、ing and a free edge. 3) There shall be a minimum of4A between the centres of any two fixings when the applied direction of shear force is at right angles to a line between the fixings. Where the direction of applied shear force is parallel to the line the minimum spacing shall be8A (seeFigure 3). Wh
41、ere fixings of two different sizes are considered their distances shall be taken as the sum of2A (right angle loading direction) and4A (parallel loading direction) for each fixing. 5.2 Other base materials Where the test is to be carried out on a base material other than the standard specimen, a des
42、cription of the base material shall be included in the test report.BS5080-2:1986 BSI 01-2000 3 NOTEThe size of base material specimens including any reinforcement or bonding details of wall panels should be agreed before commencement of tests. Other base materials shall be one of the following: a) c
43、oncrete; b) natural stone; c) cast stone; d) brick or block masonry. The compression strength of concrete base materials shall be determined in accordance with BS1881-116 for cast specimens from the same batch of concrete as that in which the fixing is installed, or BS1881-120 for cores cut from the
44、 concrete. NOTEOther means of determining the compression strength may be agreed. The density of the concrete at the time of testingshall be determined in accordance withBS1881-114. 6 Installation of fixing 6.1 Location of fixing 6.1.1 Standard specimen of base material. When installed in a standard
45、 specimen of base material a fixing shall be located in the soffit as cast. 6.1.2 Other base materials. In base materials other than a standard specimen of base material, where individual units are bonded with mortar joints, the fixing shall be located in the material, in the mortar joint (bed or pe
46、rpend) or at the interface between them. NOTEThe location should be agreed before commencement of tests. 6.2 Expanding and undercut anchors For expanding and undercut anchors, the hole shall be drilled and the anchor installed in accordance with the suppliers recommended procedure. NOTEWhere the rec
47、ommended procedure is incomplete, a specified procedure should be agreed before commencement of tests. The hole shall be normal to the base material surface. The diameter of the drill bit and any other special feature used shall be as specified by the supplier of the fixing. 6.3 Bonded fixings For b
48、onded fixings, the hole shall be drilled andproprietary systems installed in accordance with the suppliers recommended procedure. Non-proprietary systems, whether using resin adhesive or cement grout, shall be installed in accordance with the users specification. The diameter of the drill bit used s
49、hall be as specified either by the supplier of the fixing for proprietary systems or by the user for non-proprietary systems. The hole shall be normal to the base material surface. The fixing shall be secured so that the axis of the threaded portion remains normal to the surface of the base material during the placing and hardening of the bonding material. As curing times for resin adhesives are dependent on the formulation of the constituents and the surrounding temperature, the test described in7.2 and7.3 shall not be carried out until the adhesive h
