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1、NA to BS EN 1995-2:2004 UK National Annex to Eurocode 5: Design of timber structures Part 2: Bridges ICS 91.010.30; 91.080.20; 93.040 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW NATIONAL ANNEX Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 09:36:13 GMT+00:00 2006,
2、Uncontrolled Copy, (c) BSI Publishing and copyright information The BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2006 ISBN 0 580 49351 2 The following BSI references relate to the work on this standard: Committee reference B/525/5 Draft for comment
3、 05/30128368 Publication history First edition, October 2006 Amendments issued since publication Amd. no.DateText affected NA to BS EN 1995-2:2004 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 09:36:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 2006i NA to BS EN 1995-2:2004 Contents Int
4、roduction 1 NA.1Scope 1 NA.2Nationally Determined Parameters 1 NA.3Guidance on the use of informative annexes 3 NA.4Reference to non-contradictory complementary information 3 Bibliography 4 List of tables Table NA.1 Partial factors M for material properties 2 Table NA.2 Limiting values for deflectio
5、ns of beams and trusses 2 Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, an inside back cover and a back cover. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 09:36:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI NA to BS EN 1995-2:
6、2004 ii BSI 2006This page deliberately left blank Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 09:36:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 20061 NA to BS EN 1995-2:2004 National Annex NA (informative) to BS EN 1995-2:2004, Eurocode 5: Design of timber structures Part 2: Bridges
7、 Introduction This National Annex has been prepared by BSI Subcommittee B/525/5, Structural use of timber. In the UK it is to be used in conjunction with BS EN 1995-2 for the structural design of timber bridges, together with BS EN 1995-1-1, BS EN 1990 and BS EN 1991 and their respective National An
8、nexes. NA.1 Scope This National Annex gives: a)the UK decisions for the Nationally Determined Parameters described in the following subclauses of BS EN 1995-2:2004: 2.3.1.2(1) 2.4.1 7.2 7.3.1(2) b)the UK decisions on the status of BS EN 1995-2:2004 informative annexes; c)reference to non-contradicto
9、ry complementary information. NA.2 Nationally Determined Parameters NA.2.1Assignment of loads to load-duration classes BS EN 1995-2:2004, 2.3.1.2(1) Variable actions due to the passage of vehicular and pedestrian traffic should be regarded as short-term actions. Actions occurring during erection sho
10、uld be regarded as short-term actions. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 09:36:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI NA to BS EN 1995-2:2004 2 BSI 2006 NA.2.2Partial factors for material properties BS EN 1995-2:2004, 2.4.1 BS EN 1995-2:2004, Table 2.1 is implemented nati
11、onally by using Table NA.1. NA.2.3Limiting values for deflections BS EN 1995-2:2004, 7.2 BS EN 1995-2:2004, Table 7.1 is implemented nationally by using Table NA.2. NA.2.4Damping ratios BS EN 1995-2:2004, 7.3.1(2) Where no other values have been verified, the damping ratio () should be taken as: = 0
12、,010for structures without mechanical joints; = 0,015for structures with mechanical joints. Table NA.1Partial factors M for material properties Fundamental combinationsSolid timber untreatedM = 1,3 Solid timber preservatively treatedM = 1,3 Glued laminated timberM = 1,25 LVL, plywood, OSBM = 1,2 Con
13、nectionsM = 1,3 Shear connectors between timber and concrete in composite membersM,v = 1,25 Steel used in composite membersM,s = 1,15 Pre-stressing steel elementsM,s = 1,15 Concrete used in composite membersM,c = 1,5 Fatigue combinationsTimber and wood-based materialsM,fat = 1,0 ConnectionsM,fat = 1
14、,0 Shear connectors between timber and concrete in composite membersM,v,fat = 1,0 Accidental combinationsAll materialsM,acc = 1,0 Table NA.2Limiting values for deflections of beams and trusses Action Limiting value for deflections in beams and trusses of span, l Characteristic traffic loadl/400 Pede
15、strian load and low traffic loadl/200 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 09:36:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 20063 NA to BS EN 1995-2:2004 NA.3 Guidance on the use of informative annexes NA.3.1Fatigue verification BS EN 1995-2:2004, Annex A BS EN 1995-2:2004,
16、Annex A may be used. NA.3.2Vibrations caused by pedestrians BS EN 1995-2:2004, Annex B BS EN 1995-2:2004, Annex B may be used. NA.4 Reference to non-contradictory complementary information Material from BS 5268, Structural use of timber PD 6693, Complementary information for use with Eurocode 5, BSI
17、, London. (Publication date to be announced.) Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 09:36:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI NA to BS EN 1995-2:2004 4 BSI 2006 Bibliography Standards publications For dated references, only the edition cited applies. For undated references
18、, the latest edition of the referenced document (including any amendments) applies. BS 5268, Structural use of timber PD 6693, Complementary information for use with Eurocode 5 BS EN 1990:2002, Eurocode Basis of structural design BS EN 1991 (all parts), Eurocode 1 Actions on structures BS EN 1995-1-
19、1:2004, Eurocode 5 Design of timber structures Part 1-1: General Common rules and rules for buildings Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 09:36:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This page deliberately left blank NA to BS EN 1995-2:2004 Licensed Copy: sheffieldun sheffi
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