1、NA to BS EN 1998-5:2004UK National Annex to Eurocode 8: Design of structures for earthquake resistance Part 5: Foundations, retaining structures and geotechnical aspectsICS 91.120.25NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWNATIONAL ANNEXLicensed Copy: Wang Bin, ISO/EXCHA
2、NGE CHINA STANDARDS, 31/10/2008 06:59, Uncontrolled Copy, (c) BSIPublishing and copyright informationThe BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2008ISBN 987 0 580 55093 5The following BSI references relate to the work on this standard:Committ
3、ee reference B/525/8Draft for comment 07/30129896DCPublication historyFirst published August 2008Amendments issued since publicationAmd. no. Date Text affectedNA to BS EN 1998-5:2004Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 31/10/2008 06:59, Uncontrolled Copy, (c) BSI BSI 2008 iNA to BS
4、 EN 1998-5:2004ContentsIntroduction 1NA.1 Scope 1NA.2 Nationally Determined Parameters 1NA.3 Decisions on the status of the informative annexes 2NA.4 Reference to non-contradictory complementary information 2Bibliography 3List of tablesTable NA.1 UK values for Nationally Determined Parameters descri
5、bed in BS EN 1998-5:2004 1Summary of pagesThis document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 3 and a back cover.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 31/10/2008 06:59, Uncontrolled Copy, (c) BSINA to BS EN 1998-5:2004ii BSI 2008 This page delibe
6、rately left blankLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 31/10/2008 06:59, Uncontrolled Copy, (c) BSI BSI 2008 1NA to BS EN 1998-5:2004National Annex (informative) to BS EN 1998-5:2004, Eurocode 8: Design of structures for earthquake resistance Part 5: Foundations, retaining structure
7、s and geotechnical aspectsIntroductionThis 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 ScopeThis National Annex gives:a) the UK decisions for the Nationally Determined Parameters de
8、scribed 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 ParametersUK decisions for the Nationally Determined Para
9、meters described in BS EN 19985:2004 are given in Table NA.1.Table NA.1 UK values for Nationally Determined Parameters described in BS EN 1998-5:2004Subclause Nationally Determined Parameter Eurocode recommendationUK decision3.1(3) Partial factors for material properties. cu=1,4cy=1,25qu=1,4=1,25Use
10、 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. = 0,8 Use the recommended value. Further guidance is given in PD 6698.5.2(2)c) Minimum ratio p of peak ground acceleration wi
11、th depth to the product .S at the ground surface.p = 0,65 Use the recommended value.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 31/10/2008 06:59, Uncontrolled Copy, (c) BSINA to BS EN 1998-5:20042 BSI 2008NA.3 Decisions on the status of the informative annexesNA.3.1 Topographical amplific
12、ation factors BS EN 1998-5:2004, Annex ABS EN 1998-5:2004 informative Annex A may be used in the UK. See also PD 6698.NA.3.2 Pile head static stiffness BS EN 1998-5:2004, Annex CBS EN 1998-5:2004 informative Annex C may be used in the UK as an informative annex.NA.3.3 Dynamic soil structure interact
13、ion BS EN 1998-5:2004, Annex DBS EN 1998-5:2004 informative Annex D may be used in the UK as an informative annex.NA.3.4 Seismic bearing capacity of shallow foundations BS EN 1998-5:2004, Annex FBS EN 1998-5:2004 informative Annex F may be used in the UK as an informative annex.NA.4 References to no
14、n-contradictory complementary informationThe 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 1998-6
15、; Manual for the seismic design of steel and concrete buildings to Eurocode 8. Institution of Structural Engineers, London. In draft; publication expected 2008.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 31/10/2008 06:59, Uncontrolled Copy, (c) BSI BSI 2008 3NA to BS EN 1998-5:2004Bibliog
16、raphyStandards publicationsBS EN 1998-5:2004, Eurocode 8 Design of structures for earthquake resistance Part 5: Foundations, retaining structures and geotechnical aspectsPD 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 1998
17、-6Other publications1 Institution of Structural Engineers: Manual for the seismic design of steel and concrete buildings to Eurocode 8, London: publication expected 2008.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 31/10/2008 06:59, Uncontrolled Copy, (c) BSIBSI British Standards Instituti
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