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1、raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI British Standards WB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1 National Annex (informative) to Eurocode 3 Design of steel structures Part 1-10: Material toughness and throu
2、gh thickness properties NA to BS EN 1993-1-10:2005 Licensed Copy: London South Bank University, South Bank University, 02/02/2009 03:54, Uncontrolled Copy, (c) BSI NA to BS EN 1993-1-10:2005NAtioNAl ANNEx Publishing and copyright information the BSi copyright notice displayed in this document indica
3、tes when the document was last issued. BSi 2009 iSBN 978 0 580 54972 4 iCS 91.080.10 the following BSi references relate to the work on this National Annex: Committee reference B/525/10 and B/525/31 Draft for comment 07/30128140 DC Publication history First published January 2009 Amendments issued s
4、ince publication Date Text affected Licensed Copy: London South Bank University, South Bank University, 02/02/2009 03:54, Uncontrolled Copy, (c) BSI NAtioNAl ANNEx BSI 2009 1 NA to BS EN 1993-1-10:2005 National Annex (informative) to BS EN 1993-1-10:2005, Eurocode 3 Design of steel structures Part 1
5、-10: Material toughness and through thickness properties Introduction this National Annex has been prepared by BSi Subcommittee B/525/10, Bridges, in consultation with B/525/31, Structural use of steel. in the UK it is to be used in conjunction with BS EN 1993-1-10:2005. NA.1 Scope this National Ann
6、ex gives: the UK decisions for the Nationally Determined Parameters a) described in the following clauses and subclauses of BS EN 1993-1-10:2005: 2.2 (5) 3.1 (1) references to non-contradictory complementary information.b) NA.2 Nationally Determined Parameters NA.2.1 Procedure BS EN 1993-1-10:2005,
7、2.2(5) NA.2.1.1 Safety element NA.2.1.1.1 Factors affecting safety elements the value of TR should be obtained from the following equation: TR = TRD + TRg + TRt + TR + TRs where: TRD is an adjustment for the detail type (see NA.2.1.1.2); TRg is an adjustment for the gross stress concentrations (see
8、NA.2.1.1.3); TRt is an adjustment for Charpy test temperature (see NA.2.1.1.4); TR is an adjustment for the applied stress level (see NA.2.1.1.5); TRs is an adjustment for the strength grade (see NA.2.1.1.6). the procedures in NA.2.1.1.2 to NA.2.1.1.6 for TR are consistent with T = 0 C. Reference to
9、 guidance giving recommended maximum permissible values of element thickness t for reference temperatures below 50 C is given in NA.3. Licensed Copy: London South Bank University, South Bank University, 02/02/2009 03:54, Uncontrolled Copy, (c) BSI NA to BS EN 1993-1-10:2005 2 BSI 2009 NAtioNAl ANNEx
10、 NA.2.1.1.2 Adjustment for detail type, TRD the value of TRD = 0 should be used except as follows: unwelded details:a) for unwelded as-rolled, ground or machined surfaces, a value of TRD = +30 C should be used; for unwelded mechanically fastened joints or flame cut edges, a value of TRD = +20 C shou
11、ld be used; welded details:b) for welded details, the value of TRD = 0 C should be used, except for those locations given in table NA.1. table NA.1 Values of TRD for specific welded locations Component or detailInitiation siteAttachment dimensions A)TRD (C)Length (mm) B)Width (mm) C) Welded attachme
12、nttransverse weld toe150 G5020 5030 Member fabricated from platestransverse butt weld D)20 Rolled sectionstransverse butt weld D)30 A) Measured overall between weld toes on member concerned. B) Measured in direction of tensile stress. C) Measured transverse to direction of tensile stress. D) Applies
13、 only to welds joining the full cross section, not those joining individual plates prior to sub-assembly). NA.2.1.1.3 Adjustment for gross stress concentration, TRg the value of TRg should be applied for initiation sites in regions of gross stress concentration in accordance with table NA.2. table N
14、A.2 Values of TRg according to gross stress concentration factor Units in degrees Celsius (C) Stress concentration factorTRg 10 1.510 220 330 Licensed Copy: London South Bank University, South Bank University, 02/02/2009 03:54, Uncontrolled Copy, (c) BSI NAtioNAl ANNEx BSI 2009 3 NA to BS EN 1993-1-
15、10:2005 NA.2.1.1.4 Adjustment for Charpy test temperature, TRT the values of TRt according to the difference between the Charpy test temperature T and the minimum steel temperature (Tmd + Tr) should be as given in table NA.3. table NA.3 Values of TRT according to difference between Charpy test and m
16、inimum service temperatures Units in degrees Celsius (C) ApplicationT (Tmd + Tr) A)TRT A) General (except bridges conforming to BS EN 1993-2) G20 0 2510 3020 3530 35 G4040 restricted use B), C) 40Not permitted B) Bridges conforming to BS EN 1993-2 G200 20Not permitted B) A) intermediate values shoul
17、d be obtained by linear interpolation. B) See NA.2.1.2. C) Welded joint types where either T RD +TR 35 C (see tables NA.1 and NA.2 respectively). No type of welded joint should be used in tension in this temperature condition where T S35510 Licensed Copy: London South Bank University, South Bank Uni
18、versity, 02/02/2009 03:54, Uncontrolled Copy, (c) BSI NA to BS EN 1993-1-10:2005 4 BSI 2009 NAtioNAl ANNEx NA.2.1.2 Charpy test and reference temperatures and applied stress NA.2.1.2.1 Charpy test and reference temperatures the maximum range between TEd and the Charpy test temperature T should be li
19、mited such that the recommended values given in table NA.3 are achieved. NA.2.1.2.2 Range of Ed the use of table 2.1 should be restricted to the values of t given for Ed = 0.75fy(t). For other values of Ed, see NA.2.1.1.5. NA.2.1.3 Limitation of steel grade table 2.1 may be used for steel grades up
20、to and including S690 (subject to the recommendations given in NA.2.1.1.6). NA.2.2 Quality class for through thickness properties BS EN 1993-1-10:2005, 3.1(1) Class 2 should be used. Reference to design guidance is given in NA.3. NA.3 References to non-contradictory complementary information Complem
21、entary guidance on toughness and through thickness properties is given in PD 6695-1-10. Bibliography For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. PD 6695-1-10, Recommendations for the d
22、esign of structures to BS EN 1993110 BS EN 1993-2, Eurocode 3 Design of steel structures Part 2: Steel bridges Licensed Copy: London South Bank University, South Bank University, 02/02/2009 03:54, Uncontrolled Copy, (c) BSI This page deliberately left blank Licensed Copy: London South Bank Universit
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