BS EN 1156-2013 Wood-based panels Determination of duration of load and creep factors《人造板 负荷保持时间和蠕变系数的测定》.pdf
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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 1156:2013Wood-based panels Determination of duration ofload and creep factorsBS EN 1156:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation
2、 of EN 1156:2013. Itsupersedes DD ENV 1156:1999 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/541, Wood based panels.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport t
3、o include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 73753 4ICS 79.060.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This
4、 British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2013.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 1156:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1156 April 2013 ICS 79.060.01 Supersedes ENV 1156:1998
5、English Version Wood-based panels - Determination of duration of load and creep factors Panneaux base de bois - Dtermination des facteurs de dure de charge et de fluage Holzwerkstoffe - Bestimmung von Zeitstandfestigkeit und Kriechzahl This European Standard was approved by CEN on 1 March 2013. CEN
6、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 any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on appli
7、cation to the CEN-CENELEC Management Centre 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 CEN-CENELEC Man
8、agement Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latv
9、ia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-100
10、0 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1156:2013: EBS EN 1156:2013EN 1156:2013 (E) 2 Contents Page Foreword . 3 1 Scope 4 2 Normative references . 4 3 Principle 4 4 Apparatus . 4 5 Sampling of panels and pr
11、eparation of test pieces 7 5.1 Sampling and cutting . 7 5.2 Dimensions of test pieces . 7 5.3 Conditioning . 7 6 Procedure . 8 6.1 Measurement of dimensions . 8 6.2 Setting up the test rigs with test pieces 8 6.3 Determination of short-term bending strength . 8 6.4 Determination of the duration of l
12、oad and creep factors . 8 6.4.1 General testing required 8 6.4.2 Testing for duration of load . 9 6.4.3 Testing for creep 9 7 Expression of results . 10 7.1 Duration of load factor . 10 7.2 Creep factor 11 8 Test report 13 Annex A (informative) Provisional test method for medium-size test pieces . 1
13、4 A.1 General . 14 A.2 Principle 14 A.3 Apparatus . 14 A.4 Sampling of panels and the preparation of test pieces 15 A.5 Procedure . 15 A.6 Expression of results . 15 A.7 Test report 15 Bibliography 16 BS EN 1156:2013EN 1156:2013 (E) 3 Foreword This document (EN 1156:2013) has been prepared by Techni
14、cal Committee CEN/TC 112 “Wood-based panels”, the secretariat of which is held by DIN. 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 October 2013, and conflicting national standards shall be wit
15、hdrawn at the latest by October 2013. 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 supersedes ENV 1156:1998. Compared
16、 to ENV 1156:1998, the following significant technical modifications have been made: a) status changed from ENV to EN; b) accuracy of the deflection measurement changed from 0,001 mm to 0,01 mm. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
17、countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway
18、, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 1156:2013EN 1156:2013 (E) 4 1 Scope This European Standard specifies a method of determining in a constant climate both a duration of load factor and a creep factor for wood-based panels
19、 stressed in flatwise bending with and without a shear component. Details of an alternative but provisional method employing medium sized test pieces are given in Annex A; this method can also be used for test pieces loaded under varying climates. NOTE The duration of load factor is necessary to mod
20、ify the characteristic strength values obtained in short-term structural tests in order to derive long-term values. The creep factor obtained in the test is used to predict a long-term deflection from the initial elastic deflection. 2 Normative references The following documents, in whole or in part
21、, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 310, Wood-based panels Determination of modulus
22、of elasticity in bending and of bending strength EN 325, Wood-based panels Determination of dimensions of test pieces EN 326-1, Wood-based panels Sampling, cutting and inspection Part 1: Sampling and cutting of test pieces and expression of test results EN 1058, Wood-based panels Determination of ch
23、aracteristic 5 -percentile values and characteristic mean values EN 1995-1-1, Eurocode 5: Design of timber structures Part 1-1: General Common rules and rules for buildings 3 Principle Determination in a constant climate of the load duration factor (loss in strength with time under load) and the cre
24、ep factor (ratio of increase in deflection with time to the initial elastic deflection) in bending by applying and sustaining a constant moment over the central region of a test piece; both the time to failure, and the increase in deflection with time are measured. 4 Apparatus 4.1 Measuring instrume
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