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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsWB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1National Annex (informative) to Eurocode 3 Design of steel structures Part 1-10: Material toughness and through t

2、hickness propertiesNA to BS EN 1993-1-10:2005Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/05/2009 03:46, Uncontrolled Copy, (c) BSINA to BS EN 1993-1-10:2005 NAtioNAl ANNExPublishing and copyright informationthe BSi copyright notice displayed in this document indicates when the document

3、 was last issued. BSi 2009iSBN 978 0 580 54972 4iCS 91.080.10the 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 DCPublication historyFirst published January 2009Amendments issued since publicationDate Text a

4、ffected Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/05/2009 03:46, Uncontrolled Copy, (c) BSINAtioNAl ANNEx BSI 2009 1NA to BS EN 1993-1-10:2005National Annex (informative) to BS EN 1993-1-10:2005, Eurocode 3 Design of steel structures Part 1-10: Material toughness and through thicknes

5、s propertiesIntroductionthis 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 Scopethis National Annex gives:the UK decisions for the Nationally Det

6、ermined 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 ParametersNA.2.1 Procedure BS EN 1993-1-10:2005, 2.2(5)NA.2.1.1 Safety elementNA.2.1.1.1 Factors affec

7、ting safety elementsthe value of TRshould be obtained from the following equation:TR= TRD+ TRg+ TRt+ TR+ TRswhere:TRDis an adjustment for the detail type (see NA.2.1.1.2);TRgis an adjustment for the gross stress concentrations (see NA.2.1.1.3);TRtis an adjustment for Charpy test temperature (see NA.

8、2.1.1.4);TRis an adjustment for the applied stress level (see NA.2.1.1.5);TRsis 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 TRare consistent with T= 0 C.Reference to guidance giving recommended maximum permissible values of element thickness t

9、 for reference temperatures below 50 C is given in NA.3.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/05/2009 03:46, Uncontrolled Copy, (c) BSINA to BS EN 1993-1-10:20052 BSI 2009NAtioNAl ANNExNA.2.1.1.2 Adjustment for detail type, TRDthe value of TRD= 0 should be used except as follows:

10、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 should be used;welded details:b) for welded details, the value of TRD= 0 C should be used, except for thos

11、e locations given in table NA.1.table NA.1 Values of TRDfor specific welded locationsComponent or detail Initiation site Attachment dimensions A)TRD(C)Length (mm) B)Width (mm) C)Welded attachment transverse weld toe 150G50 2050 30Member fabricated from plates transverse butt weld D) 20Rolled section

12、s transverse butt weld D) 30A)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 only to welds joining the full cross section, not those joining individual plates prior to sub-assembly).NA.2.

13、1.1.3 Adjustment for gross stress concentration, TRgthe value of TRgshould be applied for initiation sites in regions of gross stress concentration in accordance with table NA.2.table NA.2 Values of TRgaccording to gross stress concentration factor Units in degrees Celsius (C)Stress concentration fa

14、ctor TRg1 01.5 102 203 30Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/05/2009 03:46, Uncontrolled Copy, (c) BSINAtioNAl ANNEx BSI 2009 3NA to BS EN 1993-1-10:2005NA.2.1.1.4 Adjustment for Charpy test temperature, TRTthe values of TRtaccording to the difference between the Charpy test te

15、mperature T and the minimum steel temperature (Tmd+ Tr) should be as given in table NA.3.table NA.3 Values of TRTaccording to difference between Charpy test and minimum service temperatures Units in degrees Celsius (C)Application T (Tmd+ Tr) A)TRTA)General (except bridges conforming to BS EN 1993-2)

16、G20 025 1030 2035 3035 G40 40 restricted use B), C)40 Not permitted B)Bridges conforming to BS EN 1993-2G20 020 Not permitted B)A)intermediate values should be obtained by linear interpolation.B) See NA.2.1.2.C) Welded joint types where either TRD+TR35 C (see tables NA.1 and NA.2 respectively). No t

17、ype of welded joint should be used in tension in this temperature condition where TS355 10Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/05/2009 03:46, Uncontrolled Copy, (c) BSINA to BS EN 1993-1-10:20054 BSI 2009NAtioNAl ANNExNA.2.1.2 Charpy test and reference temperatures and applied s

18、tressNA.2.1.2.1 Charpy test and reference temperaturesthe maximum range between TEdand the Charpy test temperature T should be limited such that the recommended values given in table NA.3 are achieved.NA.2.1.2.2 Range of Edthe use of table 2.1 should be restricted to the values of t given for Ed= 0.

19、75fy(t). For other values of Ed, see NA.2.1.1.5.NA.2.1.3 Limitation of steel gradetable 2.1 may be used for steel grades up 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 u

20、sed. Reference to design guidance is given in NA.3.NA.3 References to non-contradictory complementary informationComplementary guidance on toughness and through thickness properties is given in PD 6695-1-10.BibliographyFor dated references, only the edition cited applies. For undated references, the

21、 latest edition of the referenced document (including any amendments) applies.PD 6695-1-10, Recommendations for the design of structures to BS EN 1993110BS EN 1993-2, Eurocode 3 Design of steel structures Part 2: Steel bridgesLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/05/2009 03:46, U

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