EN 1365-3-1999 en Fire Resistance Tests for Loadbearing Elements - Part 3 Beams《承重钩件的耐火试验 第3部分 横梁》.pdf

1、BRITISH STANDARD Fire resistance tests for loadbearing elements - BS EN 13653:2000 Part 3: Beams The European Standard EN 13631999 has the status of a British Standard ICs 13.220.50 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD.BSI BS EN 3365-3-ENGL 2000 3624669 0834732

2、785 W direction of the Health and Envhment Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 March Zoo0 Amd. No. O BSI 03-2000 BS EN 13653:2000 Date Comments National foreword This British Standard is the official English language version of E

3、N 13653.1999. The UK participation in its preparation was entrusted by Technical Committee FSHL.22, Fre resistance tests, to Subcommittee FSH/22/10, Fire resistance tests for loadbearing elements, which has the responsibiity to: - aid enquirers to understand the text; - present to the responsible Eu

4、ropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; - monitor related intedonal and European developments and promulgate them in the UK A list of organizations represented on this subcommittee can be obtained on request to its secretary.

5、 The date of withdrawal of conflicting national standards has been extended to June 2001. 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 entitied “International S

6、tandards Correspondence Index”, or by wing the “Find” facility of the BSI Standards Electronic Catalogue. 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 Sta

7、ndard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 14, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was

8、 last issued. ISBN O 580 32425 7 STD.BSI BS EN L3b5-3-ENGL 2000 3624hh9 0834733 bLL EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13653 December 1999 _ ICs 13.220.50 English version Fire resistance tests for loadbearing elements - Part 3: Beams Essais de rsistance au feu des lments porteurs -

9、 Partie 3: Poutres Feuerwiderstandsprfungen fr tragende Bauteile - Teil 3: Balken This European Standard was approved by CEN on 18 February 1999. CEN members are bound to comply with the CENICENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a

10、 national standard without any alteration. Up-to-date lists and bibliographical references concerning srch national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three oficial versions (English, French, German). A version i

11、n any other language made by trimslation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as he official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Ge

12、rmany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels Q 1999 CEN

13、All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1365-3:1999 E Page 2 EN 1365-31999 Contents Foreword Introduction 1 2 3 4 5 6 7 8 9 10 11 12 13 I I Scope Normative references Definitions, symbols and designations Test equipment Test co

14、nditions Test specimen Installation of test specimen Conditioning Application of Instrumentation Test procedure Performance criteria Test report Field of direct application of test results Annex A (informative) General guidance on the test method Page 3 4 5 5 5 5 6 6 7 8 8 9 9 9 9 10 OBSI 03-2000 ST

15、D-BSI ES EN 1365-3-ENGL 2000 m I1624669 0834715 494 Page 3 EN 1365-311999 Foreword This European Standard has been prepared by Technical Committee CEN/TC 127 ?Fire safety in buildings?, the Secretariat of which is held by BSI. This European Standard shall be given the status of a national standard,

16、either by publication of an identical text or by endorsement, at the latest by June 2000, and conflicting national standards shall be withdrawn at the latest by June 2000. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to i

17、mplement 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. EN 1365 ?Fire resistance tests for loadbearing elements? consists of th

18、e following Part 1: Walls Part 2: Floors and roofs Part 3: Beams Part 4: Columns Part 5: Balconies (in course of preparation) Part 6: Stairs and walkways (in course of preparation) OBSI 03-2000 STD-BSI BS EN L365-3-ENGL 2000 Lb24bb9 08347Lb 320 Page 4 EN 1365-3 11 999 Introduction Caution The attent

19、ion of all persons concerned with managing and carrying out this fire resistance test, EN1365-3, is drawn to the fact that fire testing may be hazardous and that there is a possibility that toxic and/or harmful smoke and gases may be evolved during the test. Mechanical and operation hazards may also

20、 arise during the construction of the test elements or structures, their testing and disposal of test residues. An assessment of all potential hazards and risks to health shall be made and safety precautions shall be identified and provided. Written safety instructions shall be issued. Appropriate t

21、raining shall be given to relevant personnel. Laboratory personnel shall ensure that they follow written safety instructions at all times. OBSI 03-2000 STD-BSI BS EN L3b5-3-ENGL 2000 0 362Qbb9 0834737 267 = Page 5 EN 1365-3:1999 1 Scope This Part of EN 1365 specifies a method for determining the fir

22、e resistance of beams with or without applied fire protection systems and with or without cavities. This Standard is used in conjunction with EN 1363-1. Beams which are part of a floor construction are tested with the floor construction as described in EN 1365-2 and are subject to evaluation of inte

23、grity and insulation. General guidance on this method of test is given in annex A. 2 Normative references This European Standard incorporates, by dated or undated reference, provisions fiom other publications. These normative references are cited at the appropriate places in the test and the publica

24、tions 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 edition of the publication referred to applies. EN 1363-1 EN 1

25、363-2 EN 1365-2 prEN IS0 13943 Fire resistance tests - Part 1 : General requirements Fire resistance tests - Pari 2: Alternative and additional procedures Fire resistance tests for loadbearing elements - Part 2: Floors and roofs Fire safety - Vocabulary (ISO/DIS 13943:1998) 3 Definitions, symbols an

26、d designations 3.1 Definitions For the purposes of this Part of EN 1365, the definitions given in EN 1363-1 and prEN IS0 13943, together with the following, apply: 3.1.1 supported construction: The actual floor or roof that will be supported by beams in the building. 3.2 Symbols and designations Sym

27、bol Unit Designation Lexp mm Length of test specimen exposed to heating LS, mm Length of test specimen between centres of supports (this is equivalent to L in EN 1363-1) LSpeC mm Length of test specimen 4 Test equipment The test equipment shall be as specified in EN 1363-1. OBSI 03-2000 STDmBSI BS E

28、N L365-3-ENGL 2000 M LbZQbb7 083q7LB LT3 Page 6 EN 1365-3:1999 5 Test conditions The heating conditions, the furnace atmosphere and loading conditions shall conform to those specified in EN 1363-1 or, if applicable, EN 1363-2. The pressure condition shall be established 100 mm below the underside of

29、 the hace cover slab. 6 Test specimen 6.1 Size For simply supported beams, when full size is larger than the size which can be accommodated in the fbmace, then the exposed length Lexp shall be not less than 4 m. The span between the supports Lsup shall be the exposed length plus up to half the lengt

30、h of the bearing at each end. The length of the bearing shall be selected so that the difference between Lsup and Lexp is kept to a minimum or as in practice, whichever is the smaller. The length of the specimen LsFc shall be the exposed length plus up to a maximum of 200 mm at each end. A general a

31、rrangement of a beam in the furnace is shown in figure 1. Simply supported beams which in use are greater than twice the furnace length shall be tested under conditions to match either the maximum shear force or the maximum bending moment, whichever is the most critical in use. If this cannot be ide

32、ntified then both conditions shall be tested. For restrained beams, a 4 m minimum span is inadequate, because only a proportion of the span would be expected to be in a bending mode, the remainder being partially supported by the restraint mechanism. Therefore when testing a restrained beam a longer

33、 span in which at least 4 m is subjected to positive bending moments shall be selected. IfPh of the beam is expected to be in positive bending mode then the overall length shall be given by Lex, = 4 x lOO/Xm. 6.2 Number For a given set of support, restraint, loading and exposure conditions at least

34、one test specimen shall be tested. 6.3 Design 6.3.1 General When selecting a test specimen or designing a representative construction, consideration shall be given to the following: 6.3.2 Joints If a beam incorporates a mechanical joint along its length, this shall be incorporated as in practice or

35、at mid- span. When joints occur in fire protective claddings, test specimens incorporating such protection shall include representative joints. 6.3.3 Exposure If a beam in practice is only exposed to the effects of fire on three sides, e.g. where the top surface is supporting a floor or roof, it sha

36、ll be tested with an associated construction representative of the supported construction used in practice. OBSI 03-2000 STD.BS1 BS EN 13b5-3-ENGL 2000 I 3624bb9 0834739 03T Page 7 EN 1365-3:1999 6.3.4 Associated construction If the nature of the floor or roof is not known then an associated constru

37、ction shall be provided to the top surface. The associated construction shall be manufactured in discrete sections, with discontinuous reinforcements where used, to avoid any composite action between it and the beam which might give additional strength or stiffness to the beam. It shall be made from

38、 aerated concrete slabs having a density of (650 f 200) kg/m3, each having a maximum width of 60 mm and a thickness of (150 k 25) mm. (See figure 2) The width of the associated construction placed symmetrically along the axis of the beam shall be at least three times beam width or 600 mm whichever i

39、s greater. The actual dimension selected will depend on the furnace design and where appropriate the distance between the beam and the furnace roof. 6.3.5 Fire protection material If fire protection material is applied or fixed to the beam it shall extend over the length of the beam that is to be ex

40、posed to the heating conditions of the test. Where a void is created within the fire protection system (e.g. hollow box protection to steel beams) this void shall not be vented to outside the furnace chamber. 6.4 Construction The test specimen shall be constructed as described in EN 1363- 1. 6.5 Ver

41、ification Verification of the test specimen shall be carried out as described in EN 1363-1. 7 Installation of test specimen 7.1 General The test specimen shall be installed, as far as possible, in a manner representative of its use in practice. The extremities of the support of the beam shall be sea

42、led by resilient material of adequate fire performance to prevent the leakage of hot gases and any influence on end conditions during the test. Any joints in the associated construction and any furnace closures shall be sealed with a resilient material to prevent leakage of hot gases during the test

43、. The ends of the beam extending beyond the furnace chamber, for support purposes, shall be insulated either by the applied fire protection material itself or by wrapping with a single thickness of (1 O0 f 1 O) mm thick mineral wool with a density of (120 f 30) kg/m3. The beam shall be mounted horiz

44、ontally on top of the furnace, in its load application frame if used, such that its exposure to the test from three sides is similar to that which would normally occur in practice. When testing beams to four-sided exposure the minimum distance from the top of the beam to the furnace cover slab shall

45、 be at least equal to the width of the beam. 7.2 Supporting construction Supporting constructions are not used in the fire resistance testing of beams. OBSI 03-2000 STD-BSI BS EN 1365-3-ENGL 2000 Lb24bb9 0834720 85% Page 8 EN 1365-3:1999 7.3 Loading and restraint Test specimens representing beams sh

46、all be tested to simulate end use conditions, either simply supported or with end restraint. Where these conditions cannot be specified, the specimen shall be simply supported. Note. Special arrangements may need to be made when testing asymmetrical beams or beams restrained at one end only. The mag

47、nitude and the distribution of the load shall be such that the maximum moments and shear forces produced are representative of or higher than those expected in practice. All beams shall be tested to loads determined in accordance with EN 1363-1. The load shall be applied to simulate a uniformly load

48、ed beam and may be applied by a point loading system, in which case there shall be a minimum of two points. The method of loading shall produce a bending moment which is uniform over at least 500 mm along the length of the span, at mid-span. The loading may be applied via the slab in the case of thr

49、ee sided exposures or directly onto the beam (via blocks) for four sided exposure, in which case the loading system shall not inhibit the free circulation of air over the top surface. I The method used for supporting the ends of the test construction shall be similar to that which would be used in service. When the end conditions are not known, the test construction shall be installed as a simply supported beam. The test arrangement shall provide lateral stability. Test specimens representing continuous beams, restrained above one or tw