1、BRITISH STANDARD BS EN 596:1995 Timber structures Test methods Soft body impact test of timber framed walls The European Standard EN596:1995 has the status of a BritishStandardBSEN596:1995 This BritishStandard, having been prepared under the directionof the Sector Board forBuilding and Civil Enginee
2、ring, was published underthe authority of the Standards Board and comes into effect on 15October1995 BSI12-1999 The following BSI references relate to the work on this standard: Committee reference B/518/1 Draft for comment91/18868 DC ISBN 0 580 24604 3 Committees responsible for this BritishStandar
3、d The preparation of this BritishStandard was entrusted by Technical Committee B/518/1, Structural timber, to Subcommittee B/518/1, Test methods, upon which the following bodies were represented: Department of the Environment (British Board of Agrment) Department of the Environment (Building Researc
4、h Establishment) Institution of Civil Engineers Institution of Structural Engineers Timber Research and Development Association Wood Panel Products Federation Coopted members Amendments issued since publication Amd. No. Date CommentsBSEN596:1995 BSI 12-1999 i Contents Page Committees responsible Ins
5、ide front cover National foreword ii Foreword 2 Text of EN596 3BSEN596:1995 ii BSI 12-1999 National foreword This BritishStandard has been prepared by Subcommittee B/518/1 and is the English language version of EN596:1995 Timber structures Test methods Soft body impact test of timber framed walls pu
6、blished by the European Committee for Standardization (CEN). No existing BritishStandard is superseded. 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 Stand
7、ard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to5 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. Thi
8、s will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN596 March1995 ICS 91.040.00 Descriptors: Timber construction, structuralmembers, walls, timber frames, panels, impact tests, shock resistance English version Timber structures Tes
9、t methods Soft body impact test of timber framed walls Structures en bois Mthodes dessai Essai de corps mou sur murs ossature en bois Holzbauwerke Prfverfahren Prfung von Wnden in Holztafelbauart bei weichem Sto This European Standard was approved by CEN on1994-12-05. CEN members are bound to comply
10、 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 bibliographical references concerning such national standards may be obtained on application to the Central Secre
11、tariat 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 responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the offic
12、ial versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CEN European Committee for Standardization Comit Europen de No
13、rmalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1995 All rights of reproduction and communication in any form and by any means reserved in all countries to CEN and its members. Ref. No. EN596:1995EEN596:1995 BSI 12-1999 2 Foreword This European Sta
14、ndard has been prepared by the Technical Committee CEN/TC124, Timber structures, of which the secretariat is held by DS. NOTEIt is considered desirable to maintain the same clause numbers consistently throughout this series of standards. Consequently, some clauses are void in this edition of this st
15、andard, but it is envisaged that future editions may need to include text in these clauses. 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 September1995, and conflicting national standards shall
16、be withdrawn at the latest by September1995. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spai
17、n, Sweden, Switzerland and UnitedKingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Symbols 3 5 Requirements 3 6 Test method 3 6.1 Principle 3 6.2 Apparatus 3 6.3 Preparation of the test pieces 3 6.4 Procedure 3 6.5 Results 4 6.6 Test report 4 Figure 1 Canvas bag
18、4 Figure 2 Apparatus for testing soft body impact 5EN596:1995 BSI 12-1999 3 1 Scope This standard specifies a test method for determining the resistance of a timber frame wall panel to impact from a soft body allowed to strike the sheathing of the panel. 2 Normative references None. 3 Definitions Fo
19、r the purposes of this standard, the following definition applies. timber frame wall panel wall unit consisting of a timber and/or wood-based product framework, sheathed on at least one face with a wood-based or other sheet material. A panel may be either structural or non-structural 4 Symbols 5 Req
20、uirements The panels shall have the sheathing fixed to the loaded face of the panel, and the properties of the sheathing material shall be reported. Any sheathing fixed to the unloaded face of the panel shall also be reported. 6 Test method 6.1 Principle The test method is used to assess the effect
21、of impact energy on the panel. The method deals with wall panels which are supported at top and bottom, but other relevant support conditions may be applicable, and if used shall be reported. 6.2 Apparatus The following apparatus is required. a) Coarse canvas bag containing a thin polyethylene bag o
22、f the same size which, when filled with hardened solid glass spheres each having a diameter of(3 0,5)mm shall have a mass M of(50 0,2)kg. Figure 1 shows the form of bag. b) Arrangement whereby the bag is suspended by a rope in such a way that, while vertically at rest, the bag is just touching the p
23、anel surface at the point of impact. The arrangement is shown in Figure 2. c) Devices for: 1) hoisting; and 2) instantaneously releasing the bag. d) Stiff test rig (consisting of a steel frame) with top and bottom beams simulating service conditions. 6.3 Preparation of the test pieces The tests shal
24、l normally be carried out on wall panels which have been conditioned at the standard environment of(20 2) C and(65 5)% relative humidity, but when other conditions apply, they shall be reported. The test laboratory shall normally be maintained at the standard environment, but when other conditions a
25、pply, they shall be reported. The moisture content of the wall panels shall be determined. 6.4 Procedure The panel shall be erected vertically in the test rig. In the erection process, the fixings of the panel in the rig shall be specified by the manufacturer or supplier. Unless otherwise specified
26、the point of impact shall be at the weakest part of the panel(1500 250)mm above the intended floor level. Preliminary tests may be necessary to find the weakest part of the panel in this zone or the otherwise specified zone. Before an impact load is applied, the bag shall be rolled to loosen the sph
27、eres. The bag is placed at the impact point in such a way that, when it is suspended from the rope, it just touches the surface of the panel. The bag shall then be drawn away from the panel surface such that the maximum angle to the vertical a subtended by the movement of the rope shall be not great
28、er than65(seeFigure 2). The bag shall be hoisted to the prescribed height of drop h measured vertically from the impact point. The bag is then released and allowed to drop freely in an arc onto the face of the panel. The moisture content of the frame and sheathing (if of a wood-based product) at the
29、 vicinity of the point of failure shall be determined. g acceleration due to gravity (in m/s 2 ) h drop height (in mm) M mass of the impact load (in kg) W impact energy (in J) a angle of the support cable between the vertical position and the release position of the impact load (in )EN596:1995 4 BSI
30、 12-1999 6.5 Results After each drop, the panel shall be visually examined and any damage to the panel sheathing or framing shall be recorded. The impact energy W (in J) shall be calculated from the following equation: The symbols are as given in clause4. 6.6 Test report The test report shall includ
31、e the following information as relevant: a) sampling procedure; b) impact energy W, the number of drops and drop height, and the results of the visual examination as recorded in6.5; c) number of panels tested; d) detailed description of the test panels; e) type and specification (or other quality de
32、signation) of materials used in the panels, with a note of any defects; f) types, surface finish and strength properties of the materials of the mechanical fasteners (including corrosion protection); g) dimensions of mechanical fasteners, shapes, quantity and positioning; h) description of the fixin
33、gs of the panel to the test rig; i) type and position of any failure; j) moisture content of the framing members and sheathing at the time of failure; k) gap between the sheets in the panel (if any); l) direction of greater strength of the sheathing material. NOTE 1The sidewall of the spheroconical
34、bag is made of eight sections of coarse linen canvas (approximately600g/m 2 ) sewn together. NOTE 2The bottom of the bag is strengthened by a circular piece of leather of120mm diameter sewn into it. NOTE 3The top of the bag is slightly truncated in order to make an opening of80mm diameter. This open
35、ing is strengthened by a leather strip sewn into the bag, to which are fixed four equidistant rings held together by a suspension ring. Figure 1 Canvas bag W M h g 1000 - =EN596:1995 BSI 12-1999 5 Figure 2 Apparatus for testing soft body impactBS EN 596:1995 BSI 389 Chiswick High Road London W4 4AL
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