1、NA to BS EN 1994-1-2:2005UK National Annex to Eurocode 4: Design of composite steel and concrete structures Part 1-2: General rules Structural fire designICS 13.220.50; 91.010.30; 91.080.10; 91.080.40NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWNATIONAL ANNEXLicensed Copy: W
2、ang Bin, ISO/EXCHANGE CHINA STANDARDS, 30/10/2008 01:57, Uncontrolled Copy, (c) BSIPublishing and copyright informationThe BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2008ISBN 978 0 580 54982 3The following BSI references relate to the work on thi
3、s standard:Committee reference B/525/4Draft for comment 07/30128174 DCPublication historyFirst published August 2008Amendments issued since publicationAmd. no. Date Text affectedNA to BS EN 1994-1-2:2005Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 30/10/2008 01:57, Uncontrolled Copy, (c) B
4、SI BSI 2008 1NA to BS EN 1994-1-2:2005National Annex (informative) to BS EN 1994-1-2:2005, Eurocode 4: Design of composite steel and concrete structures Part 1.2: General rules Structural fire designIntroductionThis National Annex has been prepared by BSI Subcommittee B/525/4, Composite structures.
5、In the UK it is to be used in conjunction with BS EN 1994-1-2.NA.1 ScopeThis National Annex gives:a) the UK decisions for the Nationally Determined Parameters described in the following subclauses of BS EN 1994-1-2:2005. 1.1(16) 2.1.3(2) 2.3(1)P 2.3(2)P 2.4.2(3) 3.3.2(9) 4.1(1)P 4.3.5.1(10)b) the UK
6、 decisions on the status of BS EN 1994-1-2:2005 informative annexes; andc) references to non-contradictory complementary information.NA.2 Nationally Determined ParametersNA.2.1 GeneralUK decisions for the Nationally Determined Parameters described in BS EN 1994-1-2:2005 are given in NA.2.2 to NA.2.9
7、.NA.2.2 Concrete strength classes BS EN 1994-1-2:2005, 1.1(16)For strengths higher than C50/60 the recommendations given in BS EN 1992-1-2:2004, section 6 can be used.NA.2.3 Parametric fire exposure BS EN 1994-1-2:2005, 2.1.3(2)Use the recommended values.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA S
8、TANDARDS, 30/10/2008 01:57, Uncontrolled Copy, (c) BSINA to BS EN 1994-1-2:20052 BSI 2008NA.2.4 Partial factors for the fire situation Mechanical properties, *M,fi,a,*M,fi,s, *M,fi,c, *M,fi,v BS EN 1994-1-2:2005, 2.3(1)PUse the recommended values.NA.2.5 Partial factors for the fire situation Thermal
9、 properties, *M,fi BS EN 1994-1-2:2005, 2.3(2)PUse the recommended values NA.2.6 Member analysis and load reduction factors BS EN 1994-1-2:2005, 2.4.2(3)The partial factors for use with equations 2.4, 2.5a and 2.5b should be obtained from the National Annex to BS EN 1990:2002.NA.2.7 Thermal conducti
10、vity of concrete, 2c BS EN 1994-1-2:2005, 3.3.2(9)Use the upper limit value as recommended in Note 2.NA.2.8 Use of advanced calculation models BS EN 1994-1-2:2005, 4.1(1)PAdvanced calculation models may be used.NA.2.9 Buckling length of columns, Leiand Let BS EN 1994-1-2:2005, 4.3.5.1(10)The followi
11、ng values can be used:Lei= 0.70Let= 0.85NA.3 Decisions on the status of informative annexesBS EN 1994-1-2: 2005, Annexes A, B, C, E, F and G may be used. BS EN 1994-1-2: 2005, Annexes D, H and I should not be used. Alternative guidance is given in NA.4.NA.4 References to non-contradictory complement
12、ary informationReferences to non-contradictory complementary information cited in this National Annex can be found at www.steel-ncci.co.uk1).1)In preparationLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 30/10/2008 01:57, Uncontrolled Copy, (c) BSI BSI 2008 3NA to BS EN 1994-1-2:2005Bibliogr
13、aphyStandards publicationsFor dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.BS EN 1992-1-2:2004, Eurocode 2: Design of concrete structures Part 1-2: General rules Structural fire designNation
14、al Annex to BS EN 1990:2002, UK National Annex for Eurocode 0 Basis of structural designLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 30/10/2008 01:57, Uncontrolled Copy, (c) BSIBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards
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24、er purpose than implementation then the prior written permission of BSI must be obtained.Details and advice can be obtained from the Copyright & Licensing Manager. Tel: +44 (0)20 8996 7070 Email: NA to BS EN 1994-1-2:2005BSI Group Headquarters389 Chiswick High Road,London W4 4AL, UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 30/10/2008 01:57, Uncontrolled Copy, (c) BSI
