1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsUK National Annex to Eurocode 3: Design of steel structuresPart 1-8: Design of joints NA to BS EN 1993-1-8:2005Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/02/2009 06:54
2、, Uncontrolled Copy, (c) BSINA to BS EN 1993-1-8:2005 BritiSh StANdArdPublishing and copyright informationthe BSi copyright notice displayed in this document indicates when the document was last issued. BSi 2008iSBN 978 0 580 54969 4iCS 77.140.30the following BSi references relate to the work on thi
3、s standard: Committee reference B/525/31 draft for comment 07/30128132 dCPublication historyFirst published November 2008Amendments issued since publicationAmd. No. Date Text affected Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/02/2009 06:54, Uncontrolled Copy, (c) BSIBritiSh StANdArd
4、BSI 2008 iNA to BS EN 1993-1-8:2005Summary of pagesthis document comprises a front cover, an inside front cover, pages i to ii, pages 1 to 4, an inside back cover and a back cover.Contentsintroduction 1NA.1 Scope 1NA.2 Nationally determined Parameters 1NA.3 references to non-contradictory complement
5、ary information 3Bibliography 4List of tablestable NA.1 Partial safety factors, cM, for joints 2Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/02/2009 06:54, Uncontrolled Copy, (c) BSINA to BS EN 1993-1-8:2005 BritiSh StANdArdThis page deliberately left blankLicensed Copy: Wang Bin, ISO/E
6、XCHANGE CHINA STANDARDS, 18/02/2009 06:54, Uncontrolled Copy, (c) BSIBritiSh StANdArd BSI 2008 1NA to BS EN 1993-1-8:2005National Annex (informative) to BS EN 1993-1-8:2005, Eurocode 3: Design of steel structures Part 1.8: Design of jointsIntroductionthis National Annex has been prepared by BSi Subc
7、ommittee B/525/31, Structural use of steel. it is to be used in conjunction with BS EN 1993-1-8:2005.NA.1 Scopethis National Annex gives:the decisions for the National determined Parameters described a) in the following subclauses of BS EN 1993-1-8:2005:1.2.6 (Group 6: rivets)2.2 (2)3.1.1 (3)3.4.2 (
8、1)5.2.1 (2)6.2.7.2 (9)references to non-contradictory complementary information.b) NA.2 Nationally Determined ParametersNA.2.1 Generaldecisions for the Nationally determined Parameters described in BS EN 1993-1-8:2005 are given in clauses NA.2.2 to NA.2.7.NA.2.2 Reference Standards, Group 6 Rivets B
9、S EN 1993-1-8:2005, 1.2.6(Group 6: Rivets)BS 4620:1970 should be used for the dimensions, head shapes, and materials for rivets. For S235 and S275 steel grades the design resistance should be limited to the yield resistance as there is no separate serviceability check. NA.2.3 Partial safety factors,
10、 cM, for joints BS EN 1993-1-8:2005, 2.2(2)the partial factors given in table NA.1 should be used.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/02/2009 06:54, Uncontrolled Copy, (c) BSINA to BS EN 1993-1-8:20052 BSI 2008BritiSh StANdArdtable NA.1 Partial safety factors, cM, for jointsRes
11、istance of members and cross-section Partial factorValueresistance of bolts cM21.25resistance of rivets cM21.25resistance of pins cM21.25resistance of welds cM21.25resistance of plates in bearing A)cM21.25Slip resistance:At ultimate limit state (Category C)a) At serviceability limit state (Category
12、B) b) cM3cM3,ser1.251.10Bearing resistance of an injection bolt cM41.00resistance of joints in hollow section lattice girder cM51.00resistance of pins at serviceability limit state cM6,ser1.00Preload of high strength boltsFor bolts conforming to BS EN 14399-4 and BS EN 14399-8 Others cM7cM71.101.00A
13、)in certain circumstances deformation at serviceability might control and a cM2= 1.50 would be more appropriate. the option for deformation control applies where it is important to avoid deformation of the bolt holes (i.e. when ab= 1.0. abis defined in table 3.4 of BS EN 1993-1-8). deformation contr
14、ol need only be applied to the component of the bolt force acting in the direction in which avoiding deformation is important. NA.2.4 Type of bolt class BS EN 1993-1-8:2005, 3.1.1(3)Bolts of classes 5.8 and 6.8 should be excluded. Bolt class 4.8 may be used provided they are manufactured in accordan
15、ce with BS EN iSO 898-1 and suitable procedures to avoid hydrogen embrittlement are employed in the manufacturing process. NA.2.5 Level of preload BS EN 1993-1-8:2005, 3.4.2(1)if the preload is not explicitly used in the design calculations then no specific level of preload is required. NA.2.6 Class
16、ification of joints BS EN 1993-1-8:2005, 5.2.1(2)For buildings the following guidance may be used to classify joints.Nominally pinned joints are described as “Simple Connections” in UK practice. Connections designed in accordance with the principles given in the publication “Joints in Steel Construc
17、tion Simple Connections” 1 may be classified as nominally pinned joints.ductile, partial strength joints are described as “ductile Connections” in UK practice. they are used in plastically designed semi-continuous frames. Braced semi-continuous frames may be designed using the principles given in th
18、e publication “Semi-continuous design of braced frames” 2 with connections designed to the principles given in Section 2 of “Joints in Steel Construction Moment Connections” 3. Unbraced semi-continuous frames (known as wind moment frames) may be designed using the principles given in the publication
19、 “Wind-moment design of Low rise Frames” 4. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/02/2009 06:54, Uncontrolled Copy, (c) BSIBritiSh StANdArd BSI 2008 3NA to BS EN 1993-1-8:2005Until experience is gained with the numerical method of calculating rotational stiffness given in BS EN 1
20、993-1-8:2005, 6.3 and the classification by stiffness method given in BS EN 1993-1-8:2005, 5.2.2, semi-continuous elastic design should only be used where either it is supported by test evidence according to BS EN 1993-1-8:2005, 5.2.2.1(2) or where it is based on satisfactorily performance in a simi
21、lar situation.Connections designed in accordance with the principles given in the publication “Joints in Steel Construction Moment Connections” 3 may be classified on the basis of the guidance given in Section 2.5 of the same publication.NA.2.7 Beam to column joints with end-plate connections BS EN
22、1993-1-8:2005, 6.2.7.2(9)it is only necessary to apply Equation 6.26 when a full plastic distribution of effective design tension resistance cannot be assumed. A full plastic distribution can be assumed when either:FFtx,rdt,rd19.ortd ffpuy,p19.ortd fffcuy,fc19.WhereFtx,rdis the effective design tens
23、ion resistance of one of the previous bolt-rows xFt,rdis the design tension resistance of an individual bolttpis the end plate thicknesstfcis the column flange thicknessd is the diameter of the boltfy,pis the design strength of the end platefy,fcis the design strength of the column flangefuis the ul
24、timate tensile strength of the boltWhere the effective design tension resistance has to be reduced to satisfy equation 6.26 the surplus resistance may be redistributed to bolt rows nearer the centre of compression.NA.3 References to non-contradictory complementary informationreferences cited in this
25、 National Annex to non-contradictory, complementary information can be found at www.steel-ncci.co.uk. Whilst this material is likely to be technically authoritative, not all of it has been reviewed by the UK national committee, and users should satisfy themselves of its fitness for their particular
26、purpose. in particular, they should be aware that material indicated as not having been endorsed by the committee might contain elements that are in conflict with the Eurocode.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/02/2009 06:54, Uncontrolled Copy, (c) BSINA to BS EN 1993-1-8:2005
27、4 BSI 2008BritiSh StANdArdBibliographyStandards publicationsFor dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.BS 4620:1970, Specification for rivets for general engineering purposesBS EN iSO
28、898-1, Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studsBS EN 14399-4, High-strength structural bolting assemblies for preloading System HV Part 4: Hexagon bolt and nut assembliesBS EN 14399-8, High-strength structural bolting assemblies for prel
29、oading System HV Part 8: Hexagon fit bolts and nut assembliesOther publicationsJoints in Steel Construction. Simple Connections, BCSA, 1 SCi publication No. P212, Jointly published by the British Constructional Steelwork Association and the Steel Construction institute, 2002.design of semi-continuou
30、s braced frames, SCi publication No. 2 P183, the Steel Construction institute, 1997.Joints in Steel Construction. Moment Connections, BCSA, 3 SCi publication No. P207, jointly published by the British Constructional Steelwork Association and the Steel Construction institute, 1995.Wind-moment design
31、of low rise frames, SCi publication No. 4 P263, the Steel Construction institute, 1999. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/02/2009 06:54, Uncontrolled Copy, (c) BSIThis page deliberately left blankLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/02/2009 06:54, Uncontr
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