1、NA to BS EN 1994-2:2005UK National Annex to Eurocode 4: Design of composite steel and concrete structures Part 2: General rules and rules for bridgesICS 91.010.30; 91.080.10; 91.080.40; 93.040NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWNATIONAL ANNEXLicensed Copy: Wang Bin,
2、 ISO/EXCHANGE CHINA STANDARDS, 24/03/2008 07:27, Uncontrolled Copy, (c) BSIPublishing and copyright informationThe BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2007ISBN 978 0 580 54983 0The following BSI references relate to the work on this standa
3、rd:Committee reference B/525/4Draft for comment 06/30128176 DCPublication historyFirst published December 2007Amendments issued since publicationAmd. no. Date Text affectedNA to BS EN 1994-2:2005Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 24/03/2008 07:27, Uncontrolled Copy, (c) BSI BSI 2
4、007 1NA to BS EN 1994-2:2005National Annex (informative) to BS EN 1994-2:2005, Eurocode 4: Design of composite steel and concrete structures Part 2: General rules and rules for bridgesIntroductionThis National Annex has been prepared by BSI Subcommittee B/525/4, Composite structures. In the UK it is
5、 to be used in conjunction with BS EN 1994-2:2005.NA.1 ScopeThis National Annex gives:a) the UK decisions for the Nationally Determined Parameters:1) in the general rules described in the following subclauses of BS EN 1994-2:2005, which come from BS EN 1994-1-1:2004:2) in the specific rules for brid
6、ges described in the following subclauses of BS EN 1994-2:2005:NOTE See foreword to EN 1994-2:2005.b) the UK decision on the status of BS EN 1994-2:2005, informative Annex C; andc) references to non-contradictory complementary information. NA.2 Nationally Determined ParametersNA.2.1 Reference to gui
7、dance for shear connectors other than welded headed studs BS EN 1994-2:2005, 1.1.3 (3)Guidance for shear connectors other than welded headed studs is given in PD 6696-2. 2.4.1.1 (1) 2.4.1.2 (5)P 6.6.3.1 (1) 1.1.3 (3) 6.6.1.1 (13) 2.4.1.2 (6)P 6.8.1 (3) 5.4.4 (1) 6.8.2 (1) 6.2.1.5 (9) 7.4.1 (4) 6.2.2
8、.5 (3) 7.4.1 (6) 6.3.1 (1) 8.4.3 (3)Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 24/03/2008 07:27, Uncontrolled Copy, (c) BSINA to BS EN 1994-2:20052 BSI 2007NA.2.2 Partial factor for pre-stressing action, PBS EN 1994-2:2005, 2.4.1.1 (1)The partial factor for pre-stressing action, P, shoul
9、d be 1,0 for favourable and unfavourable effects, as recommended in BS EN 1994-2.NA.2.3 Partial factor for design shear resistance of a headed stud, V BS EN 1994-2:2005, 2.4.1.2 (5)PThe partial factor for design shear resistance of a headed stud, V, should be 1,25 as recommended in BS EN 1994-2.NA.2
10、.4 Partial factor for fatigue strength of studs in shear, Mf,s BS EN 1994-2:2005, 2.4.1.2 (6)PThe partial factor for fatigue strength of studs in shear, Mf,s, should be 1,0 as recommended in BS EN 1994-2.NA.2.5 Combination factor for global and local action effects BS EN 1994-2:2005, 5.4.4 (1)The co
11、mbination factor for global and local action effects for bridges except road bridges should be 1,0.The combination factor for global and local action effects for road bridges is stated to be a nationally determined parameter in BS EN 1993-2:2006, E.2. The value for this parameter should be as recomm
12、ended in the National Annex to BS EN 1993-2:20061). NA.2.6 Choice of the methods for calculating elastic resistance to bending BS EN 1994-2:2005, 6.2.1.5 (9)In calculating the elastic resistance to bending, the method given in BS EN 1994-2:2005, 6.2.1.5 (7) and (8) or the method given in BS EN 1993-
13、1-5:2006, Section 10 may be used.NA.2.7 Values of CRd,cand k1for concrete flanges in tension BS EN 1994-2:2005, 6.2.2.5 (3)The value of the coefficient CRd,cshould be 0,15/Cas recommended in BS EN 1994-2.The value of the coefficient k1should be 0,12 as recommended in BS EN 1994-2.NA.2.8 Reference to
14、 rules for transverse filler beams BS EN 1994-2:2005, 6.3.1 (1)Rules for transverse filler beams are given in PD 6696-2.1)In preparation.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 24/03/2008 07:27, Uncontrolled Copy, (c) BSI BSI 2007 3NA to BS EN 1994-2:2005NA.2.9 Shear connection BS EN
15、1994-2:2005, 6.6.1.1 (13)No reference is provided to further guidance on considering the effects of bending moments at the steel-concrete interface, about an axis parallel to the axis of the steel beam, caused by deformations of the slab or the steel member, adjacent to cross frames and vertical web
16、 stiffeners, and for composite box girders.NA.2.10 Partial factor for design shear resistance of a headed stud, VBS EN 1994-2:2005, 6.6.3.1 (1)The partial factor for design shear resistance of a headed stud, V, should be 1,25 as recommended in BS EN 1994-2.NA.2.11 Reduction factor for the shear resi
17、stance of a stud connector, ks BS EN 1994-2:2005, 6.8.1 (3)The reduction factor for the shear resistance of a stud connector, ks, should be 0,75 as recommended in BS EN 1994-2. NA.2.12 Partial factor for fatigue strength of studs in shear, Mf,s BS EN 1994-2:2005, 6.8.2 (1)The partial factor for fati
18、gue strength of studs in shear, Mf,s, should be 1,0 as recommended in BS EN 1994-2:2005, 2.4.1.2 (6)P.NA.2.13 Design value of crack width, wk, and the combination of actions BS EN 1994-2:2005, 7.4.1 (4)The value of wk, which should be taken as wmax, and the combination of actions, are stated to be n
19、ationally determined parameters in BS EN 1992-2:2005, 7.3.1 (105). These parameters should be as recommended in the National Annex to BS EN 1992-2:2005.NA.2.14 Specific measures to limit the heat of hydration of cement and the temperature difference to be considered BS EN 1994-2:2005, 7.4.1 (6)Speci
20、fic measures to limit the heat of hydration of cement may be described in a project specification together with the temperature difference to be considered. If no specific measures to limit the heat of hydration of cement are described in the project specification then the temperature difference to
21、be considered should be 25 K.NA.2.15 Shear connection and transverse reinforcement BS EN 1994-2:2005, 8.4.3 (3)No reference is provided to information describing the provision of reinforcement near shear connectors arranged in groups to prevent premature local failure in either the precast or the in
22、 situ concrete.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 24/03/2008 07:27, Uncontrolled Copy, (c) BSINA to BS EN 1994-2:20054 BSI 2007NA.3 Decision on the status of informative annexes BS EN 1994-2:2005, Annex C, Headed studs that cause splitting forces in the direction of the slab thic
23、knessBS EN 1994-2:2005, Annex C should be used.NA.4 References to non-contradictory complementary information Non-contradictory complementary information for use with BS EN 1994-2 is given in PD 6696-2.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 24/03/2008 07:27, Uncontrolled Copy, (c) BS
24、I BSI 2007 5NA to BS EN 1994-2:2005BibliographyStandards publicationsFor dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.BS EN 1992-2:2005, Eurocode 2 Design of concrete structures Part 2: Conc
25、rete bridges Design and detailing rulesBS EN 1993-1-5:2006, Eurocode 3 Design of steel structures Part 1-5: Plated structural elementsBS EN 1993-2:2006, Eurocode 3 Design of steel structures Part 2: Steel bridgesBS EN 1994-1-1:2004, Eurocode 4 Design of composite steel and concrete structures Genera
26、l rules and rules for buildingsNational Annex to BS EN 1992-2:2005: UK National Annex to Eurocode 2 Design of concrete structures Part 2: Concrete bridges Design and detailing rules National Annex to BS EN 1993-2:20062). UK National Annex to Eurocode 3 Design of steel structures Part 2: Steel bridge
27、sPD 6696-2:2007, Background paper to BS EN 1994-2 and the UK National Annex to BS EN 1994-22)In preparation.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 24/03/2008 07:27, Uncontrolled Copy, (c) BSIBSI British Standards InstitutionBSI is the independent national body responsible for prepari
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35、 on the BSI website at http:/www.bsi-.CopyrightCopyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, sto
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