NA-TO-BS-EN-1994-1-2-2005.pdf
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1、NA to BS EN 1994-1-2:2005 UK National Annex to Eurocode 4: Design of composite steel and concrete structures Part 1-2: General rules Structural fire design ICS 13.220.50; 91.010.30; 91.080.10; 91.080.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW NATIONAL ANNEX Licensed Co
2、pyChinese University of Hong Kong, 21/10/2008 03:04, Uncontrolled Copy, (c) BSI Publishing and copyright information The BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2008 ISBN 978 0 580 54982 3 The following BSI references relate to the work on thi
3、s standard: Committee reference B/525/4 Draft for comment 07/30128174 DC Publication history First published August 2008 Amendments issued since publication Amd. no.DateText affected NA to BS EN 1994-1-2:2005 Licensed CopyChinese University of Hong Kong, 21/10/2008 03:04, Uncontrolled Copy, (c) BSI
4、BSI 20081 NA to BS EN 1994-1-2:2005 National 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 design Introduction This 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 Scope This 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
6、UK decisions on the status of BS EN 1994-1-2:2005 informative annexes; and c)references to non-contradictory complementary information. NA.2 Nationally Determined Parameters NA.2.1General UK decisions for the Nationally Determined Parameters described in BS EN 1994-1-2:2005 are given in NA.2.2 to NA
7、.2.9. NA.2.2Concrete 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.2.3Parametric fire exposure BS EN 1994-1-2:2005, 2.1.3(2) Use the recommended values. Licensed CopyChinese University of Hon
8、g Kong, 21/10/2008 03:04, Uncontrolled Copy, (c) BSI NA to BS EN 1994-1-2:2005 2 BSI 2008 NA.2.4Partial 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)P Use the recommended values. NA.2.5Partial factors for the fire situati
9、on Thermal properties, * *M,fi BS EN 1994-1-2:2005, 2.3(2)P Use the recommended values NA.2.6Member 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.2.7The
10、rmal conductivity of concrete, 2 2c BS EN 1994-1-2:2005, 3.3.2(9) Use the upper limit value as recommended in Note 2. NA.2.8Use of advanced calculation models BS EN 1994-1-2:2005, 4.1(1)P Advanced calculation models may be used. NA.2.9Buckling length of columns, Lei and Let BS EN 1994-1-2:2005, 4.3.
11、5.1(10) The following values can be used: Lei = 0.70 Let = 0.85 NA.3 Decisions on the status of informative annexes BS 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 no
12、n-contradictory complementary information References to non-contradictory complementary information cited in this National Annex can be found at www.steel-ncci.co.uk1). 1) In preparation Licensed CopyChinese University of Hong Kong, 21/10/2008 03:04, Uncontrolled Copy, (c) BSI BSI 20083 NA to BS EN
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