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1、NA to BS EN 1998-5:2004 UK National Annex to Eurocode 8: Design of structures for earthquake resistance Part 5: Foundations, retaining structures and geotechnical aspects ICS 91.120.25 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW NATIONAL ANNEX Licensed CopyChinese Universi
2、ty of Hong Kong, 21/10/2008 03:09, 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 987 0 580 55093 5 The following BSI references relate to the work on this standard: Commit
3、tee reference B/525/8 Draft for comment 07/30129896DC Publication history First published August 2008 Amendments issued since publication Amd. no.DateText affected NA to BS EN 1998-5:2004 Licensed CopyChinese University of Hong Kong, 21/10/2008 03:09, Uncontrolled Copy, (c) BSI BSI 2008i NA to BS EN
4、 1998-5:2004 Contents Introduction 1 NA.1Scope 1 NA.2Nationally Determined Parameters 1 NA.3Decisions on the status of the informative annexes 2 NA.4Reference to non-contradictory complementary information 2 Bibliography 3 List of tables Table NA.1 UK values for Nationally Determined Parameters desc
5、ribed in BS EN 1998-5:2004 1 Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 3 and a back cover. Licensed CopyChinese University of Hong Kong, 21/10/2008 03:09, Uncontrolled Copy, (c) BSI NA to BS EN 1998-5:2004 ii BSI 2008This page deliberat
6、ely left blank Licensed CopyChinese University of Hong Kong, 21/10/2008 03:09, Uncontrolled Copy, (c) BSI BSI 20081 NA to BS EN 1998-5:2004 National Annex (informative) to BS EN 1998-5:2004, Eurocode 8: Design of structures for earthquake resistance Part 5: Foundations, retaining structures and geot
7、echnical aspects Introduction This National Annex has been prepared by BSI Subcommittee B/525/8, Structures in seismic regions. In the UK it is to be used in conjunction with BS EN 1998-5:2004. NA.1 Scope This National Annex gives: a)the UK decisions for the Nationally Determined Parameters describe
8、d in the following subclauses of BS EN 1998-5:2004: 3.1(3) 4.1.4(11) 5.2(2)c) b)the UK decisions on the status of BS EN 1998-5:2004 informative annexes; c)references to non-contradictory complementary information. NA.2 Nationally Determined Parameters UK decisions for the Nationally Determined Param
9、eters described in BS EN 19985:2004 are given in Table NA.1. Table NA.1UK values for Nationally Determined Parameters described in BS EN 1998-5:2004 Subclause Nationally Determined ParameterEurocode recommendation UK decision 3.1(3)Partial factors for material properties.cu =1,4 cy =1,25 qu =1,4 =1,
10、25 Use the recommended values. 4.1.4(11)Ratio of upper stress limit for susceptibility to liquefaction to critical stress known to have caused liquefaction in previous earthquakes. = 0,8Use the recommended value. Further guidance is given in PD 6698. 5.2(2)c)Minimum ratio p of peak ground accelerati
11、on with depth to the product .S at the ground surface. p = 0,65Use the recommended value. Licensed CopyChinese University of Hong Kong, 21/10/2008 03:09, Uncontrolled Copy, (c) BSI NA to BS EN 1998-5:2004 2 BSI 2008 NA.3 Decisions on the status of the informative annexes NA.3.1Topographical amplific
12、ation factors BS EN 1998-5:2004, Annex A BS EN 1998-5:2004 informative Annex A may be used in the UK. See also PD 6698. NA.3.2Pile head static stiffness BS EN 1998-5:2004, Annex C BS EN 1998-5:2004 informative Annex C may be used in the UK as an informative annex. NA.3.3Dynamic soil structure intera
13、ction BS EN 1998-5:2004, Annex D BS EN 1998-5:2004 informative Annex D may be used in the UK as an informative annex. NA.3.4Seismic bearing capacity of shallow foundations BS EN 1998-5:2004, Annex F BS EN 1998-5:2004 informative Annex F may be used in the UK as an informative annex. NA.4 References
14、to non-contradictory complementary information The following is a list of references that contain non-contradictory complementary information for use with BS EN 1998-5:2004. PD 6698:2008, Background paper to the UK National Annexes to BS EN 1998-1, BS EN 1998-2, BS EN 1998-4, BS EN 1998-5 and BS EN
15、1998-6; Manual for the seismic design of steel and concrete buildings to Eurocode 8. Institution of Structural Engineers, London. In draft; publication expected 2008. Licensed CopyChinese University of Hong Kong, 21/10/2008 03:09, Uncontrolled Copy, (c) BSI BSI 20083 NA to BS EN 1998-5:2004 Bibliogr
16、aphy Standards publications BS EN 1998-5:2004, Eurocode 8 Design of structures for earthquake resistance Part 5: Foundations, retaining structures and geotechnical aspects PD 6698:2008, Background paper to the UK National Annexes to BS EN 1998-1, BS EN 1998-2, BS EN 1998-4, BS EN 1998-5 and BS EN 19
17、98-6 Other publications 1 Institution of Structural Engineers: Manual for the seismic design of steel and concrete buildings to Eurocode 8, London: publication expected 2008. Licensed CopyChinese University of Hong Kong, 21/10/2008 03:09, Uncontrolled Copy, (c) BSI BSI British Standards Institution
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