1、February 2010 Translation by DIN-Sprachendienst.English price group 18No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).I
2、CS 13.220.50!$O“1574497www.din.deDDIN EN 15080-8Extended application of results from fire resistance tests Part 8: BeamsEnglish translation of DIN EN 15080-8:2010-02Erweiterter Anwendungsbereich der Ergebnisse aus Feuerwiderstandsprfungen Teil 8: BalkenEnglische bersetzung von DIN EN 15080-8:2010-02
3、Application tendue des rsultats des essais de rsistance au feu Partie 8: PoutresTraduction anglaise de DIN EN 15080-8:2010-02www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.02.10 46DIN EN 15080-8:2010-02 A comma is used as the deci
4、mal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 127 “Fire safety in buildings” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Bauwesen (Building and Civil Engineering Standards Committee)
5、, Working Committee NA 005-52-02 AA Brandverhalten von Baustoffen und Bauteilen Bauteile. 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15080-8 October 2009 ICS 13.220.50; 91.060.99 English Version Extended application of results from fire resistance tests - Part 8: Beams Application tendue
6、 des rsultats des essais de rsistance au feu - Partie 8 : Poutres Erweiterter Anwendungsbereich der Ergebnisse aus Feuerwiderstandsprfungen - Teil 8: Balken This European Standard was approved by CEN on 10 February 2008. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
7、 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 CEN Management Centre or to any CEN member. This European Sta
8、ndard 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 CEN Management Centre has the same status as the official versions. CEN members are the national s
9、tandards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United
10、 Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15080-8:2009:
11、EContents Page Foreword . 4 1 Scope 5 2 Normative references . 5 3 Terms and definitions . 5 4 Basis and methodology of establishing the extended application . 6 4.1 General . 6 4.2 Basic principles . 7 4.2.1 General . 7 4.2.2 Basis of the extended application . 7 4.2.3 Mode of failure . 7 4.2.4 Met
12、hods of analysis 7 4.3 Basic thermal analysis . 8 4.4 Basic structural analysis 8 4.4.1 General . 8 4.4.2 Modelling factor 8 4.4.3 Material properties 9 4.5 Analysis of other features 10 5 Critical parameters 10 5.1 General . 10 5.2 Common thermal parameters 10 5.3 Common mechanical parameters . 11
13、5.4 Common constructional parameters 11 5.5 Specific constructional parameters for beams without applied fire protection . 11 5.5.1 Concrete beams 11 5.5.2 Steel beams . 12 5.5.3 Composite steel-concrete beams 12 5.5.4 Timber beams 12 5.5.5 Mechanically jointed beams 13 5.6 Specific constructional p
14、arameters for beams with applied fire protection 13 6 Report of the extended application analysis . 14 Annex A (informative) Guidelines for making assessments 15 A.1 Mode of failure . 15 A.1.1 General . 15 A.1.2 Failure of protection system 15 A.1.3 Change of structural mode of failure from bending
15、to shear . 15 A.1.4 Change of structure mode of failure from bending to connection failure 16 A.2 Effect of material strength . 16 A.3 Extrapolation of fire resistance . 17 A.4 Accuracy of predictions . 17 A.5 Prediction based on material laws 18 A.6 Modifying predicted temperatures 18 A.7 Deflectio
16、n limits 19 Annex B (informative) The Extended Application Of Steel Beams 20 B.1 Introduction . 20 B.2 Analysis of reference tests 20 B.2.1 Thermal performance . 20 B.2.2 Mechanical performance 21 B.2.3 Other features 22 B.3 Model for extended application . 22 EN 15080-8:2009 (E) DIN EN 15080-8:2010
17、-02 2Annex C (informative) The Extended Application Of Timber Beams 24 C.1 Introduction . 24 C.2 Extended application in the load domain (increase of load-bearing capacity) 24 C.2.1 Increasing of load-bearing capacity by higher strength class . 24 C.2.2 Increasing of load-bearing capacity by increas
18、ing beam dimensions (braced beams) 25 C.2.3 Increasing of load-bearing capacity by decreasing the fire resistance 26 C.3 Extended application in the time domain: Increasing fire resistance by applied fire protection 30 Annex D (informative) The Extended Application of a Composite Steel Concrete Beam
19、 . 32 D.1 Introduction . 32 D.1.1 General . 32 D.1.2 Reference test 1 33 D.1.3 Reference test 2 33 D.2 Analysis of reference tests 34 D.2.1 Thermal performance . 34 D.2.2 Reference test 1 34 D.2.3 Reference test 2 35 D.2.4 Structural performance 36 D.2.5 Bending resistance . 36 D.2.6 Assessment of r
20、eference test 1 . 36 D.2.7 Assessment of reference test 2 . 37 D.2.8 Conclusions of structural performance 38 D.2.9 Model for extended application . 38 D.2.10 Extended application 38 Annex E (informative) The extended application of concrete beams . 41 E.1 Introduction . 41 E.2 Failure modes 41 E.3
21、Examples . 41 E.3.1 Possible change of failure mode . 41 E.3.2 Change of cross section 42 E.3.3 Change of material strength 42 E.3.4 Axial and rotational restraint . 43 Bibliography . 44 EN 15080-8:2009 (E) DIN EN 15080-8:2010-02 3Foreword This document (EN 15080-8:2009) has been prepared by Technic
22、al 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, either by publication of an identical text or by endorsement, at the latest by April 2010, and conflicting national standards shall be
23、 withdrawn at the latest by April 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandat
24、e given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EC Directive(s). According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard:
25、 Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 1
26、5080-8:2009 (E) DIN EN 15080-8:2010-02 41 Scope This part of EN 15080 identifies the parameters and factors that affect the fire resistance of beams and need to be taken into account when considering extended application of results of beams tested in accordance with EN 1365-3. It also gives the meth
27、odology to be used when preparing an extended application, including rules and calculation methods which can be applied to establish the resultant influence of a variation in one or more parameters and to determine the field of extended application. 2 Normative references The following referenced do
28、cuments are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 338, Structural timber Strength classes EN 1194, Timber structures Glued
29、laminated timber Strength classes and determination of characteristic values EN 1363-1:1999, Fire resistance tests Part 1: General Requirements EN 1365-3:1999, Fire resistance tests for loadbearing elements Part 3: Beams EN 10025-1, Hot rolled products of structural steels Part 1: General technical
30、delivery conditions EN 10025-2, Hot rolled products of structural steels Part 2: Technical delivery conditions for non-alloy structural steels EN 100801, Steel for the reinforcement of concrete Weldable reinforcing steel Part 1: General requirements prEN 10138-1, Prestressing steels Part 1: General
31、requirements EN 13501-2, Fire classification of construction products and building elements Part 2: Classification using data from fire resistance tests, excluding ventilation services EN ISO 13943:2000, Fire safety Vocabulary (ISO 13943:2000) 3 Terms and definitions For the purposes of this documen
32、t, the terms and definitions given in EN ISO 13943:2000, EN 1363-1:1999 and EN 1365-3:1999, together with the following apply. 3.1 test result outcome of a testing process and its associated procedures detailed within EN 1365-3 (which may include some processing of the results from the testing of a
33、number of specimens). A test result is expressed in terms of one or more fire performance parameter(s) 3.2 direct field of application of test results outcome of a process (involving the application of defined rules) whereby a test result is deemed to be equally valid for variations in one or more o
34、f the product properties and/or intended end use application(s) NOTE The direct field of application of test results are presented in EN 1365-3. EN 15080-8:2009 (E) DIN EN 15080-8:2010-02 53.3 extended field of application of test results outcome of a process (involving the application of defined ru
35、les that may incorporate calculation procedures) that predicts, for a variation of a product property and/or its intended end use application(s), a test result on the basis of one or more test results to the same test standard, i.e. to EN 1365-3 3.4 classification process defined in EN 13501-2, wher
36、eby the fire performance parameters obtained from the results of one test, or a set of tests, or from a process of extended application, are compared with limiting values for those parameters that are set as criteria for achieving a certain classification NOTE The relevant classes and related criter
37、ia for fire resistance are specified in Commission Decisions (2000/367/EC, 2000/147/EC and 2001/671/EC). 3.5 reference test fire resistance test according to EN 1365-3 on a beam from which the test result is used for the process of extended application NOTE There may be more than one reference test.
38、 3.6 parameter aspect of the reference scenario that may vary in practice and may result in a change of the fire resistance performance NOTE Examples are the load level and the span. 3.7 modelling factor factor determined for a considered relevant structural failure mode on basis of the assessment o
39、f the reference test(s), which takes into account the differences between the test results and calculated results, and which is used to adjust the results of the extended application 3.8 calculated structural resistance resistance to bending or shear of a beam in a fire test calculated at the end of
40、 the test 3.9 effective structural resistance predicted resistance to bending or shear of a beam for use in an extended application 3.10 relative resistance ratio of the bending or shear resistance of a beam in a fire resistance test to the resistance at normal temperatures calculated with all safet
41、y factors taken as unity 3.11 target classification fire resistance that the extended application is required to achieve 4 Basis and methodology of establishing the extended application 4.1 General An extended application analysis is required when the application of a beam is not covered by the fiel
42、d of direct application given in the classification document of the product. EN 15080-8:2009 (E) DIN EN 15080-8:2010-02 6The situation of (a) fire test(s) carried out according to EN 1365-3 will be referred to as the “reference test” and “reference scenario”. The result of a test, i.e. the fire resi
43、stance with respect to the load bearing capacity, will be referred as “tref,fi”. If more than one reference test is available, all the tests may be used for the extended application provided that the tests all have the same mechanical boundary conditions and have all been carried out using the same
44、fire curve. NOTE It is possible that in the classification report all reference beams are classified with the same classification “Rref” although the actual test results (tref,fi) given in the test reports may differ. 4.2 Basic principles 4.2.1 General It is assumed that extended application is made
45、 by appropriately qualified and experienced persons in the field of structural fire design. The reference test(s) shall be well documented, i.e. an insight into the performance of the test specimen(s) and the mode of failure, leading to Rref, are available. Three analyses (described in 4.3, 4.4 and
46、4.5) should be carried out where appropriate. It shall be decided whether: field of application can be extended, maintaining the classification Rrefor changing the classification and if so, by how much; extension is not possible (new tests are required). Any predicted increase in fire resistance sha
47、ll not exceed the lesser of 15 min and 20 % of the target classification. NOTE This is illustrated in A.3. 4.2.2 Basis of the extended application An adequate understanding of the structural and thermal performance, as well as an understanding of other relevant features, shall be achieved based on t
48、he scope of the required extended application. For minor or obvious extensions to the reference test, the depth of analysis required may be reduced. 4.2.3 Mode of failure Any assessment shall consider the possibility that the mode or cause of failure, such as structural collapse in bending or failur
49、e of a fire protection system, might change and that the mode or cause of failure in a fire test may no longer be critical if one or more parameters are changed. If a change of failure mode is expected, then extended application is not possible unless additional information is available. NOTE For additional information see A.1. 4.2.4 Methods of analysis When analysing the reference test(s), the rules given in the Eurocodes shall be used if applicable. Additional rules are given in this standard. These are also applicable in cases where
