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1、NA to BS EN 1994-2:2005 UK National Annex to Eurocode 4: Design of composite steel and concrete structures Part 2: General rules and rules for bridges ICS 91.010.30; 91.080.10; 91.080.40; 93.040 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW NATIONAL ANNEX Licensed Copy: Lond
2、on South Bank University, London South Bank University, Thu Dec 20 03:30:11 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Publishing and copyright information The BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2007 ISBN 978 0 580 54983 0 The following B
3、SI references relate to the work on this standard: Committee reference B/525/4 Draft for comment 06/30128176 DC Publication history First published December 2007 Amendments issued since publication Amd. no.DateText affected NA to BS EN 1994-2:2005 Licensed Copy: London South Bank University, London
4、South Bank University, Thu Dec 20 03:30:11 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BSI 20071 NA to BS EN 1994-2:2005 National Annex (informative) to BS EN 1994-2:2005, Eurocode 4: Design of composite steel and concrete structures Part 2: General rules and rules for bridges Introduction This Natio
5、nal Annex has been prepared by BSI Subcommittee B/525/4, Composite structures. In the UK it is to be used in conjunction with BS EN 1994-2:2005. NA.1 Scope This National Annex gives: a)the UK decisions for the Nationally Determined Parameters: 1)in the general rules described in the following subcla
6、uses of BS EN 1994-2:2005, which come from BS EN 1994-1-1:2004: 2)in the specific rules for bridges 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; and c)references to non-cont
7、radictory complementary information. NA.2 Nationally Determined Parameters NA.2.1Reference to guidance 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
8、 (1) 1.1.3 (3)6.6.1.1 (13) 2.4.1.2 (6)P6.8.1 (3) 5.4.4 (1)6.8.2 (1) 6.2.1.5 (9)7.4.1 (4) 6.2.2.5 (3)7.4.1 (6) 6.3.1 (1)8.4.3 (3) Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 03:30:11 GMT+00:00 2007, Uncontrolled Copy, (c) BSI NA to BS EN 1994-2:2005 2 BSI 200
9、7 NA.2.2Partial factor for pre-stressing action, P BS EN 1994-2:2005, 2.4.1.1 (1) The partial factor for pre-stressing action, P, should be 1,0 for favourable and unfavourable effects, as recommended in BS EN 1994-2. NA.2.3Partial factor for design shear resistance of a headed stud, V BS EN 1994-2:2
10、005, 2.4.1.2 (5)P The partial factor for design shear resistance of a headed stud, V, should be 1,25 as recommended in BS EN 1994-2. NA.2.4Partial factor for fatigue strength of studs in shear, Mf,s BS EN 1994-2:2005, 2.4.1.2 (6)P The partial factor for fatigue strength of studs in shear, Mf,s, shou
11、ld be 1,0 as recommended in BS EN 1994-2. NA.2.5Combination factor for global and local action effects BS EN 1994-2:2005, 5.4.4 (1) The combination 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
12、 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 recommended in the National Annex to BS EN 1993-2:20061). NA.2.6Choice of the methods for calculating elastic resistance to bending BS EN 1994-2:2005, 6.2.1.5 (9) In c
13、alculating 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 1993-1-5:2006, Section 10 may be used. NA.2.7Values of CRd,c and k1 for concrete flanges in tension BS EN 1994-2:2005, 6.2.2.5 (3) The value of the coefficient CRd,c
14、should be 0,15/C as recommended in BS EN 1994-2. The value of the coefficient k1 should be 0,12 as recommended in BS EN 1994-2. NA.2.8Reference to 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
15、: London South Bank University, London South Bank University, Thu Dec 20 03:30:11 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BSI 20073 NA to BS EN 1994-2:2005 NA.2.9Shear connection BS EN 1994-2:2005, 6.6.1.1 (13) No reference is provided to further guidance on considering the effects of bending mom
16、ents 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 stiffeners, and for composite box girders. NA.2.10Partial factor for design shear resistance of a headed stud,
17、 V BS 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.2.11Reduction factor for the shear resistance of a stud connector, ks BS EN 1994-2:2005, 6.8.1 (3) The reduction factor for the shear resistance of
18、a stud connector, ks, should be 0,75 as recommended in BS EN 1994-2. NA.2.12Partial factor for fatigue strength of studs in shear, Mf,s BS EN 1994-2:2005, 6.8.2 (1) The partial factor for fatigue 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.
19、13Design 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 nationally determined parameters in BS EN 1992-2:2005, 7.3.1 (105). These parameters should be as recommende
20、d in the National Annex to BS EN 1992-2:2005. NA.2.14Specific 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) Specific measures to limit the heat of hydration of cement may be described in a project specification together
21、 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 be considered should be 25 K. NA.2.15Shear connection and transverse reinforcement BS EN 1994-2:2005, 8.4.
22、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 situ concrete. Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 03:
23、30:11 GMT+00:00 2007, Uncontrolled Copy, (c) BSI NA to BS EN 1994-2:2005 4 BSI 2007 NA.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 thickness BS EN 1994-2:2005, Annex C should be used. NA.4 Reference
24、s to non-contradictory complementary information Non-contradictory complementary information for use with BS EN 1994-2 is given in PD 6696-2. Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 03:30:11 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BSI 20075 NA to BS E
25、N 1994-2:2005 Bibliography Standards publications For 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: Concrete bridges Desig
26、n and detailing rules BS EN 1993-1-5:2006, Eurocode 3 Design of steel structures Part 1-5: Plated structural elements BS EN 1993-2:2006, Eurocode 3 Design of steel structures Part 2: Steel bridges BS EN 1994-1-1:2004, Eurocode 4 Design of composite steel and concrete structures General rules and rul
27、es for buildings National 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 bridges PD 6696-2:20
28、07, Background paper to BS EN 1994-2 and the UK National Annex to BS EN 1994-2 2) In preparation. Licensed Copy: London South Bank University, London South Bank University, Thu Dec 20 03:30:11 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BSI British Standards Institution BSI is the independent nationa
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