BS EN 1195-1998 Timber structures - Test methods - Performance of structural floor decking《木材结构 试验方法 地板结构性能》.pdf

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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1195 : 1998 Incorpo

2、rating Amendment No. 1 The European Standard EN 1195 : 1997 has the status of a British Standard ICS 91.060.30; 91.080.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Timber structures Test methods Performance of structural floor deckingThis British Standard, having been pr

3、epared under the direction of the Sector Board for Building and Civil Engineering, was published under the authority of the Standards Board and comes into effect on 15 February 1998 BSI 1998 ISBN 0 580 28998 2 BS EN 1195 : 1998 Amendments issued since publication Amd. No. Date Text affected 9976 May

4、 1998 Indicated by a sideline in the margin National foreword This British Standard is the English language version of EN 1195 : 1997. The UK participation in its preparation was entrusted by Technical Committee B/518, Structural timber, to Subcommittee B/518/1, Test methods, which has the responsib

5、ility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizatio

6、ns represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Corr

7、espondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. Compliance with a British Standard does not of itself confer immunity from legal obligations.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Cent

8、ral Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1195 : 1997 E EUROPEAN STANDARD EN 1195 NORME EUROPE ENNE EUROPA ISCHE NORM October 1997 ICS 91.060.30; 91.080.20 Descriptors

9、: Timber construction, wooden floors, tests, impact tests, static tests, loadings, stiffness tests, comparative tests, test results English version Timber structures Test methods Performance of structural floor decking Structures en bois Me thodes dessais Comportement des planchers structuraux Holzb

10、auwerke Pru fverfahren Tragverhalten tragender Fubodenbela ge This European Standard was approved by CEN on 1997-10-02. 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

11、 any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made

12、 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 official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland,

13、Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 1195 : 1997 BSI 1998 Foreword This European Standard has been prepared by Technical Committee CEN/TC 124, Timber structures, the Secretariat of which is held by DS. This European Standa

14、rd shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 1998, and conflicting national standards shall be withdrawn at the latest by April 1998. According to the CEN/CENELEC Internal Regulations, the national standards

15、 organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page F

16、oreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Symbols 3 5 Requirements 3 6 Test methods 3 6.1 Principle 3 6.2 Apparatus 3 6.3 Preparation of specimens 4 6.4 Procedure 4 6.5 Results 6 6.6 Test report 6 Annexes A (informative) Typical form of test floors 7 B (informative) Impact loadi

17、ng body 10Page 3 EN 1195 : 1997 BSI 1998 1 Scope This standard specifies test methods for determining the performance of structural floor decking subjected to: specified concentrated static load (due e.g. to imposed action from persons, furniture and equipment); and specified impact loads (produced

18、e.g. by human motion). The decking considered is constructed of boards, laminated boards or wood-based panel products supported on timber joists. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references a

19、re cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest

20、edition of the publication referred to applies. EN 322 Wood-based panels Determination of moisture content EN 323 Wood-based panels Determination of density 3 Definitions For the purposes of this standard, the following definitions apply: 3.1 set Residual deformation of the test floor after the remo

21、val of the applied load. 3.2 differential set Differing residual deformations at joints in the decking after the removal of the test load. 3.3 structural floor decking Specified assembly of decking of boards or wood-based panel products. The characteristic of the decking is that it is supported by j

22、oists and, when subjected to load, free to deflect between the joists. 3.4 board Floor decking material of sawn and processed solid timber. 3.5 panel Floor decking material of wood-based panel products (e.g. particleboard or plywood). 3.6 method of support The way in which the floor decking material

23、 is supported (e.g. simply or continuously supported), together with the form of fixing the floor decking material to the supports (e.g. nailing, screwing and/or gluing). 4 Symbols F applied load, in newtons; F max maximum load, in newtons; F max,est estimated maximum load, in newtons; R stiffness o

24、f the structural floor decking, in newtons per millimetre; w deformations, in millimetres; w m mean value of the deformations in a test, in millimetres. 5 Requirements The manufacture and assembly of the test floor decking shall comply with the manufacturers specification. NOTE. Typical types of tes

25、t floor deckings are shown in annex A. 6 Test methods 6.1 Principle The test floor decking shall be placed horizontally on a rigid base, the appropriate static or impact loads shall be applied and the corresponding deformations measured, and damage observed. 6.2 Apparatus 6.2.1 Static load test The

26、loading equipment used shall be capable of measuring the load to an accuracy of 2 % of the load applied or, for loads less than 10 % of the maximum load, with an accuracy of 0,2 % of the maximum load. The deformations shall be measured to within an accuracy of: 0,05 mm for values of up to 2,5 mm; an

27、d 0,1 mm for values greater than 2,5 mm. The test apparatus, shown diagramatically in annex A (which is used primarily to show a typical set up of the test floor decking) consists of the following: a) rigid base of structural steel (or equivalent) members positioned under, and providing continuous s

28、upport to, the test floor joists. The test floor joists shall be fixed to the supports; b) device for applying a vertical concentrated static load. The load shall be applied through a flat steel surface with a diameter of (25 0,1) mm and with the edge of the contact surface rounded with a radius of

29、2 mm;Page 4 EN 1195 : 1997 BSI 1998 NOTE. The load will normally be transferred to the test floor by means of a steel frame (yoke), see figure A.3. This frame should normally have a length of at least 250 mm to ensure that only insignificant horizontal forces occur; c) equipment for measuring deform

30、ations of the board or panel relative to the supporting joists at the point of application of the loads; d) equipment for recording loads and deformation according to the loading procedures specified, see 6.4. Alternatively equipment for measuring deformations at chosen loads may be used, provided t

31、he measurements can be carried out without significantly influencing the continuity of the load application; e) device for measuring the set of the upper surface of the test floor at the point of application of the load. The set shall be measured, in relation to the upper surface, at points vertical

32、ly above the supports; f) device for measuring the differential set and deformation at joints measured on the upper surface. NOTE. An example of a suitable device is shown in annex A. 6.2.2 Impact load test The impact load test apparatus consists of the following: a) leather bag containing a thin po

33、lyethylene bag of the same form and size and filled with hardened solid glass spheres of (3 0,5) mm diameter and having a mass of (30 0,6) kg and (250 2) mm in diameter. NOTE. A form of bag which can be used is shown in annex B; b) device for hoisting and instantaneous release of the bag; c) measuri

34、ng rods with lengths equal to the prescribed drop heights 1 mm; d) device for measuring the set, to the nearest 0,1 mm, of the upper surface of the floor at the point of impact. The set shall be measured in relation to the points vertically above the supports; e) device for measuring differential se

35、t at joints to the nearest 0,1 mm, measured on the upper surface of the test floor. Sufficient free space shall be available under the test floor so as to permit the bottom of the bag to penetrate the flooring material at failure. 6.3 Preparation of specimens 6.3.1 Conditioning The tests shall be ca

36、rried out on structural floor decking made from material which has been conditioned at the standard environment of (20 2) C and (65 5) % relative humidity. The material is conditioned when it attains constant mass. Constant mass is considered to be attained when the results of two successive weighin

37、gs, carried out at an interval of 6 h, do not differ by more than 0,1 % of the mass of the test specimen. The density of the structural floor decking materials shall be determined in accordance with EN 323. The moisture content of the structural floor decking materials shall be determined in accorda

38、nce with EN 322. Where the material to be tested is not readily conditionable to the above standard environment (e.g. for hardwoods with high densities), that fact shall be reported. The tests shall be carried out within 48 h of removal of the floor decking material from the conditioning environment

39、. During this period (48 h max.) the floor shall be kept in an environment of (20 5) C and (60 20) % relative humidity. 6.3.2 Test laboratory The test laboratory shall normally be maintained at the standard environment of (20 2) C and (65 5) % relative humidity, but when other conditions apply, they

40、 shall be reported. 6.4 Procedure 6.4.1 Static load Points of loading closer to the end beams, see figures A.1a and A.1b, than 300 mm for boards and 600 mm for panels shall not be used. The set at the point of loading and the differential set and deflection at joints shall be recorded. The points of

41、 loading shall be chosen at the most vulnerable points on the test floor. 6.4.1.1 Stiffness test The test floor shall be placed horizontally on its supports and fixed (see 6.2.1). The loading procedure used shall be as shown in figure 1a, using one of the following methods for measuring deformations

42、 at points 01, 04, 14, 11, 21 and 24: a) on the underside of the board or panel. A displacement transducer shall be placed in the centre of the load; or b) taken as the displacement of the loading disc relative to the bearing. The procedure shall include the measurement of the initial set and the di

43、fferential set.Page 5 EN 1195 : 1997 BSI 1998 Figure 1a. Loading procedure Static load and deformation Stiffness test Figure 1b. Loading procedure Static load and deformation Strength test 6.4.1.2 Strength test The loading procedure used shall be as shown in figure 1b. The load F shall be applied at

44、 a constant rate of deflection and so adjusted that the maximum load F max is reached in (300 120) s. The objective is that the average time to reach the load F max for similar tests is 300 s. 6.4.2 Impact load The test floor shall be placed horizontally on its supports with the minimum bearing and

45、the method of support and span specified in the manufacturers specification (see figure 2 and figure A.2). The test floor shall be supported in the test rig on a rigid base (see 6.2.1). The test floor shall be fixed to the rigid beams in the test rig. The points of loading shall be chosen at the mos

46、t vulnerable points on the test floor. Before an impact load is applied, the bag shall be rolled to loosen the glass spheres. The bag shall be hoisted to the prescribed height over the chosen point of impact. The height shall be checked using a measuring rod. The bag shall then be released, and allo

47、wed to fall freely on to the floor decking. The set at the point of impact and the differential set at the joints, if any, shall be recorded.Page 6 EN 1195 : 1997 BSI 1998 Figure 2. Example of impact load test 6.5 Results 6.5.1 Static load For each loading point the following results shall be report

48、ed: a) deformation at the load 0,4F max,est calculated as the average of the first and second loadings, as follows: w m = 4 3 (w 04 2 w 01 )+( w 24 2 w 21 ) 2 mm where: w 01 , w 04 , w 21 and w 24 are the deformations recorded at the points 01, 04, 21 and 24 in figure 1a; b) set at the point of load

49、ing and the differential set at joints at the load 0,4 F max,est ; c) recorded value of F max with a description of the mode of failure of the structural floor decking; d) stiffness of the structural floor decking, calculated from the equation: R = N/mm F 24 2 F 21 w 24 2 w 21 where: F 24 is the load (in the stiffness test) of 0,4 F max,est ; F 21 is the load (in the stiffness test) of 0,1 F max,est ; w 24 and w 21 are the deformations determined at those loads; e) load deformatio