EN 1195-1997 en Timber Structures - Test Methods - Performance of Structural Floor Decking《木材结构的试验方法 结构地板铺面的性能》.pdf

1、STD-BSI BS EN 1195-ENGL 1778 m Lb2LibbS Ob78345 T5L m BRITISH STANDARD Timber structures - Test methods - Performance of structural floor decking The European Stanard 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

2、 COPYRIGHT LAW BS EN 1195 : 1998 BS EN 1196 : 1998 direction of the Sector Board for Amd. No. Da Building and Civil Engineering, was published under the authority of the Standards Board and comes into effect on 16 February 1998 O BSI 1998 National foreword Text affected This British Standard is the

3、English language version of EN 1195 : 1997. The UK participation in its preparation was entrusted by lkchnica Committee W518, Structural timber, to Subcommittee B/518/1, Test methods, which has the responsibility to: - aid enquirem to understand the text; - present to the responsible European commit

4、ke any enquiries on the inteqretai3on, or proposals for change, and keep the K interests informed; - monitor related international and European developments and promulgate them in the UK. A list of organbations represented on this committee can be obtained on request to its secretary. Cross-referenc

5、es The British Standards which implement intrnationa,l or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled Intedonal standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. Compl

6、iance with a British Standard does not of itself confer immunity from legai obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 10, an inside back cover and a back cover. ISBN O 880 28998 2 * * ul STD-BSI BS EN L195-ENGL 2778 W Lb

7、2LibbS Ob78347 824 W EN 1195 October 1997 ICs 91.060.30 91.080.20 Descriptors: Timber construction, wooden floors, tests, impact tests, static tests, loadings, stiffness tests, comparative tests, test results Engkh version Timberstru-methods- Performance of stma floor deckmg stnictures en bois - Mth

8、odes dessais - Comportement des planchers strum Holzbuwerke - prufverfahren - Tragverhalten tragender FUBbodenkhge This European Standard was approved by CEN on 1997-10-02. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipuiak the conditions for giving this European

9、 Standard the status of a national standard without my alkmtion. Up-to-date lists and bibliographid 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 officiai versions (Engiish, French,

10、 Geman). 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 official versions. CEN members are the national stan- bodies of Austria, Belgium, Czech Republic, Denmark, Fi

11、nland, France, Germany, Greece, Icehd, Ireland, Italy, Luxembourg, Netherlands, Nomay, Portugal, Spain, Sweden, Switzerland and United Kingdom. European Committee for Standardization Comit Europen de Nommon Europisches Komitee fr Normung Centrai Secretariat: rue de Stassart 36, B-1060 Brussels O 199

12、7 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1195 : 1997 E Page 2 EN U96 : 1997 Foreword This European Standard has been prepared by Technid Committee CENPIY= 124, Amber structures, the Secretariat of which is held by DS. This

13、 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 April 1998, and conflicting nationai standards SM be withdrawn at the latest by April 1998. According to the CENKENELEC Internal Regulations, the nation

14、al standards organizations of the following countries are bound to implement this European Standara Austria, Belgium, Czech Republic, Denmark, Finland, France, w, Greece, Iceland, Ireland, It and - specified impact loads (produced e.g. by human motion). The decking considered is constructed of board

15、s, 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 are cited at the appropriate places in the text and the publications a

16、re 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 edition of the publication referred to applies. EN 322 EN 323 Wood-ba

17、sed pa,nels - Determination of misture content Wood-based panels - Determination of cllpnsity 3 Denitions For the purposes of this standard, the following definitions apply: 3.1 set Residual deformation of the test floor after the removal of the applied load. 3.2 differential set Differing residual

18、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 joists and, when subjected to load, free to deflect between the jo

19、ists. 3.4 board Floor decking material of sawn and processed solid timber. 3.6 panel Floor decking material of wood-based panel products (e.g. particleboard or plywood). Page 3 EN 1195 : 1997 3.6 method of support The way in which the floor decking material is supported (e.g. simply or continuously

20、supported), together with the form of xing the floor decking material to the supports (e.g. naiing, screwing and/or gluW. 4 Symbols F applied load, in newtons; Fmax maximum load, in newtons; Fma,est estimated maximum load, in newtons; R W deformations, in millimetres; w, stiffness of the structural

21、floor decking, in newtons per millimetre; 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 test floor deckings are shown in annex A. 6 Test methods

22、 6.1 Principle The test floor decking shall be placed horizontaliy 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 loading equipment used shall be capable of measuring

23、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; and 0,l mm for values greater than 2,5 mm. The test appa

24、ratus, shown dmgramatically in annex A (which is used primariiy 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 support to, the test floor joists. The test floor joists

25、 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 f 0,l) mm and with the edge of the contact surface rounded with a radius of 2 mm; O BSI 1998 STD*BSI BS EN LL95-ENGL 2998 = Lb24b

26、b9 Ob78350 319 - Page 4 EN U95 : 1997 NOTE. The load will nonnally be transferred to the test floor by means of a steel frame (yoke), see figure A.3. This frame should normaliy have a length of at least 260 mm to ensure that oniy insignificant horizontai forces occw, c) equipment for measuring defor

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

28、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 shal be measured, in relation to the upper surface, at points verticall

29、y 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 h 6.2.2 Impact load test The impact load test apparatus consists of the following: a) leather bag containing a thin poly

30、ethylene bag of the same form and size and filied with hardened solid giass spheres of (3 f 0,s) mm diameter and having a mass of (Nf0,6) kg and (250f 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) measurin

31、g rods with lengths equal to the prescribed drop heights f 1 mm; d) device for measuring the set, to the nearest 0,l mm, of the upper surface of the floor at the point of impact The set shall be measured in e) device for measuring differential set at joints to the nearest 0,l mm, measured on the upp

32、er 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 penem the flooring maerial at failure. 6.3 Preparation of specimens 6.3.1 Cond2tionZng The tests shall be carried out on structurai floor decking made from material wh

33、ich has been conditioned at the standard environment of (20 f 2) “C and (65 f 5) % relative humidity The material is conditioned when it aitains constant mass. Constant mass is considered to be attained when the resuits of two successive weighings, carried out at an intend of 6 h, do not differ by m

34、ore than 0,1% of the mass of the test specimen. , reiation to the points verticaiiy above the supports; The density of the sh- floor decking materiais shall be determined in accordance with EN 323. The moisture content of the stnidural floor decking materials shall be determined in accordance with E

35、N 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 shaU be carried out within 48 h of removal of the floor decking material from the conditioning environment. During thi

36、s period (48 h max.) the floor shall be kept in an environment of (20 f 5) “C and (60 * 20) % relative humid 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 differential set. O BSI 1998 * * cn Page 5

37、EN 1195 : 1997 6.4.1.2 St?-mgi% test The loading procedure used shall be as shown in figure lb. The load F shaU be applied at a constant rate of deflection and so usted that the maximum load F, is reached in (300 120) s. The objective is that the average time to reach the load Fmax for simii tests i

38、s 300 s. 6.4.2 Impact load The test floor shall be placed horizontally on its supports with the minimum bearing and the method of support and span specified in the manufacturers specification (see figure 2 and figure A.2). “he test floor shali be supported in the test rig on a rigid base (see 6.2.1)

39、. The test floor shall be ked to the rigid beams in the test rig. The points of loading shall be chosen at the most 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 c

40、hosen point of impact The height shall be checked using a measuring rod. The bag shall then be released, and allowed 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. Load FFm% t LC Il h724 21 j1 s 120 1 ao 240 T

41、ime, seconds Deformation Figure la. Loading procedure - Static load and deformation - Stiffness test Lc i _- 1 .o - I I 1 I b 60 120 180 240 300 360 420 d Time, seconds Deforma tion Figure lb. Loading procedure - Static load and deformation - Strength test O BSI 1998 Page 6 EN Li95 : 1997 I I Test f

42、loor J Figure 2. Example of impact load test 6.6 Results 6.6.2 At#justments 6.6.1 Static load repom. The estimated maximum load Fmax,est shall be determined on the basis of experience, calculation or Fma,est for a test deviates by more than 20 % from a mean value of F, obtained for similar tests, th

43、e values of w and R for that test shail be reported 6.6.3 Impact load After each impact the following results shall be reported: For each loading point the following db Shall be tests and be austed as nec. f a) defrmalicm at the load O,max,est calculated as the average of the first and second loadin

44、gs, as 4 (WO4 - WOl) -i (w24 - w21) 3 follows: sep-iy. c 2 1 Wm= - where: wo1, ww, w21 and 24 are the deformatons recorded at the points 01,04,21 and 24 in figure la; a) set at the point of impact and the differential set at joints; b) set at the point of loading and the differential set at joints a

45、t the load 0,4 Fmm,st; c) recorded value of F, with a description of the mode of failure of the stsuctural floor decking; d) stifniess of the structural floor decking, calculated from the equation: Nfmm - F24 - F21 w24 - w21 R- where: F24 is the load (i the stiffness test) Of 0,4 Fm,est; F2i is the

46、load (i the stBhe test) Of 0,l Fm,est; 24 and w21 are the deformations determined at e) load deformation curve. the loads, b) whether a visual examuiati * on of the floor decking shows failure or penetration; c) description of the mode and type of failure, if any. 6.6 Test report The test report sha

47、ll include the following: a) sampling procedure; b) description of the strum floor decking materials, incluing moisture content and density, c) conitioning environment of the structurai floor decking materials; d) test loads sustained during the tests together with the corresponding deformations at

48、all measurement positions; f) specification and quality of materia3 used in the manufacture of the test floor decking with a note of any defects; e) values Of Wm and F- and R; O BSI 1998 STD-BSI BS EN 1175-ENGL 1798 9 1b24bb7 b76353 O28 Page 7 EN 1195 : 1997 g) description of the set up, including g

49、luing, fxmgs etc. of the test floor decking; h) description of the loading of the structural floor decking and of measuring the deformations; Annex A (%ormative) Typical form of test floors in this annex, the following symbols are used a b distance between joist centres, in rnillimetres; width of the board or panel, measured perpendicularly to the span, in millimetres; i) type and position of any failure; j) gap (if any) between the boards or sheets in the structural floor decking k) direction of greater strength of the structur