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 1UK National Annex to Eurocode 3: Design of steel structuresPart 1-11: Design of structures with tension component
2、sNA to BS EN 1993-1-11:2006Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 05:54, Uncontrolled Copy, (c) BSINA to BS EN 1993-1-11:2006 BritiSh StANdArdPublishing and copyright informationthe BSi copyright notice displayed in this document indicates when the document was last issued
3、. BSi 2008iSBN 978 0 580 54973 1iCS 91.010.30, 91.080.10, 93.040the following BSi references relate to the work on this standard: Committee reference B/525/31 draft for comment 08/30128144 dCPublication historyFirst published december 2008Amendments issued since publicationDate Text affected License
4、d Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 05:54, Uncontrolled Copy, (c) BSIBritiSh StANdArd BSI 2008 iNA to BS EN 1993-1-11:2006Contentsintroduction 1NA.1 Scope 1NA.2 Nationally determined Parameters 1NA.3 decision on the status of informative annexes 6NA.4 references to non-contrad
5、ictory complementary information 6Bibliography 7Summary of pagesthis document comprises a front cover, an inside front cover, pages i to ii, pages 1 to 8, an inside back cover and a back cover.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 05:54, Uncontrolled Copy, (c) BSINA to BS
6、 EN 1993-1-11:2006ii BSI 2008BritiSh StANdArdThis page deliberately left blankLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 05:54, Uncontrolled Copy, (c) BSIBritiSh StANdArd BSI 2008 1NA to BS EN 1993-1-11:2006National Annex (informative) to BS EN 1993-1-11:2006, Eurocode 3: Desi
7、gn of steel structures Part 1-11: Design of structures with tension componentsIntroductionthis 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 1991-1-11:2006.NA.1 Scop
8、ethis National Annex gives:the UK decisions for the Nationally determined Parameters a) described in the following subclauses of BS EN 1993-1-11:2006:2.3.6 (1)2.3.6 (2)2.4.1 (1)3.1 (1)4.4 (2)4.5 (4)5.3 (2)6.2 (2)6.3.2 (1)6.3.4 (1)6.4.1 (1)P7.2 (2)A.4.5.1 (1)A.4.5.2 (1)B (6)the UK decisions on the st
9、atus of BS EN 1991-1-11:2006 b) informative annexes; andreferences to non-contradictory complementary information. c) NA.2 Nationally Determined ParametersNA.2.1 Replacement and loss of tension components BS EN 1993-1-11:2006, 2.3.6(1) NOTEduring replacement of tension components, all elements of th
10、e structure should satisfy the relevant serviceability and ultimate limit state requirements without any restrictions to traffic or other imposed loads, unless specified otherwise in the Project Specification. if restrictions to traffic and other imposed loads are considered, the restrictions measur
11、es should be detailed in the Project Specification. For ultimate limit states, the load factors and combination factors in the transient situation should be taken to be the same as for the persistent combination. For serviceability limit states, verifications should be made using the characteristic,
12、 frequent or quasi-permanent combination as required by the relevant Eurocode provisions.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 05:54, Uncontrolled Copy, (c) BSINA to BS EN 1993-1-11:20062 BSI 2008BritiSh StANdArd(2) NOTEUnless specified otherwise for specific projects, st
13、ructures should be designed to accommodate the loss of any one hanger, stay without any restrictions to traffic or other imposed loads. the structure should be designed to satisfy all ultimate limit state requirements in the accidental combination, including the dynamic effect of cable removal in NO
14、tE 2 of 2.3.6(2). Where a structure cannot be designed to accommodate the loss of a particular tension component, the Project Specification should specify the protection measures to be adopted to prevent sudden removal of that tension componentNA.2.2 Transient design situation during the constructio
15、n phase BS EN 1993-1-11:2006, 2.4.1(1) NOTEthe recommended values for cGishould be adopted.NA.2.3 Strengths of steels and wires BS EN 1993-1-11:2006, 3.1(1) NOTE 6At present there is no limit to the maximum value for fu. however the current ongoing research might find that extra high strength wire i
16、s more susceptible to premature failure. Wires of tensile strengths greater than the recommended maximum value should be agreed and specified in the Project Specification. NA.2.4 Corrosion protection of the exterior of Group B tension components BS EN 1993-1-11:2006, 4.4(2) NOTE 1the corrosion resis
17、tance class for the stainless steel should be specified for the individual projects.NA.2.5 Corrosion protection of Group C tension components BS EN 1993-1-11:2006, 4.5(4) NOTE 1trials should be undertaken for all fillers. Continuous hydrophobic materials may include soft fillers such as wax or soft
18、resin. Grease can be subject to problems of thermal stability; it should not therefore be used without a suitable verification of thermal stability. hard fillers, such as cement grout should not be used.NA.2.6 Transient construction phase BS EN 1993-1-11:2006, 5.2(3) NOTEthe recommended values for c
19、Pshould be adopted.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 05:54, Uncontrolled Copy, (c) BSIBritiSh StANdArd BSI 2008 3NA to BS EN 1993-1-11:2006NA.2.7 Persistent design situation during service BS EN 1993-1-11:2006, 5.3(2) NOTECombination of P and G into a single action (G
20、 + P) is not appropriate for cable-stayed bridges with stiff decks, externally post-tensioned bridges and guyed towers and masts, because normal site monitoring of deflections and adjustment of cables will be insufficient to guarantee that there is no significant unintended imbalance between G and P
21、.the aforementioned structures are therefore not within the scope of BS EN 1993-1-11:2006, 5.3. if the rules of BS EN 1993-1-11 are applied to such structure types it is suggested that the actions P and G should have partial factors applied to them separately as required in 5.2(3). in such cases the
22、 project specification should give the values of cGand cPthat are to be used.NA.2.8 Prestressing bars and Group B and C components BS EN 1993-1-11:2006, 6.2(2) NOTE 4the recommended values for crin table 6.2 should be adopted.NA.2.9 Slipping of cables over saddles BS EN 1993-1-11:2006, 6.3.2(1) NOTE
23、the recommended value for cM,frshould be adopted.NA.2.10 Design of saddles BS EN 1993-1-11:2006, 6.3.4(1) NOTEthe recommended value for k should be adopted.NA.2.11 Slipping of cables over saddles BS EN 1993-1-11:2006, 6.4.1(1)P NOTE 1the recommended value for cM,frshould be adopted.NA.2.12 Stress li
24、mits BS EN 1993-1-11:2006, 7.2(2) NOTE 1the recommended values for fconstin table 7.1 and fSLSin table 7.2 should be adopted.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 05:54, Uncontrolled Copy, (c) BSINA to BS EN 1993-1-11:20064 BSI 2008BritiSh StANdArdNA.2.13 Waterproofing BS
25、 EN 1993-1-11:2006, A.4.5.1(1) NOTEthe tension components should be tested for watertightness in accordance with article 11.3 of SETRA Cable Stays 1 unless an alternative test is specified in the Project Specification.NA.2.14 Corrosion protection barriers BS EN 1993-1-11:2006, A.4.5.2NOTEtest requir
26、ements for protective void fillers for Group C tension components, individual hdPE sheaths and outer stay pipes are given in table NA.1 and table NA.2.table NA.1 Protective void filler for Group C tension componentsCharacter specified Value specified Test methodPour point 77 C iSO 2207Penetration at
27、 20 C No cracking AStM 937Penetration at 25 C 20 mm2/s AStM d445-06Bleeding at 40 C At 7 days 950 kg/m3BS EN iSO 1183-2Melt flow index of 5 kg at 190 C 800 MPa on average BS iSO 178tensile stress at yield point at 23 C 19 MPa BS EN iSO 527-3Ultraviolet radiation stability Condition E AStM d3350Carbo
28、n-black content (inner layer only in the case of a co-extruded stay pipe)2.3% 0.3% by weight iSO 6964Carbon-black dispersion index 1000 ppmthermal stability 220 C for 20 minutes AStM d3350Oxidative induction time at 200 C 20 minutes BS EN 10837 or AStM d3350Elongation at fracture 500% hdPE sheaths35
29、0% Stay pipesBS EN iSO 527-3izod impact strength at 23 C 20 kJ/m2BS EN iSO 180Stress cracking resistance at stress F 50 1000 h AStM 1693, condition BShore d hardness 55 points BS EN iSO 868NA.2.15 Annex B Transport, storage, handling(6) NOTEMonitoring might be required to confirm that the design ass
30、umptions, such as final forces in tension components and vibration of tension components due to wind, rain and traffic, have been met in the completed structure. the Project Specification should specify the required monitoring regime and its duration.Suitable monitoring includes:Wind monitoring equi
31、pment (anemometers and wind direction).a) Load indicators to record cable stay loads.b) Bi-directional accelerometers on the free length of cables to c) assess vibration. Acoustic monitoring.d) details of maintenance procedures should be provided which should include at least:Procedures for minor an
32、d major maintenance operations expected during the design lifetime of the tension components;the replacement procedure for a tension component in accordance with the design assumptions made in the Project Specification.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 05:54, Uncontro
33、lled Copy, (c) BSINA to BS EN 1993-1-11:20066 BSI 2008BritiSh StANdArdNA.3 Decision on the status of informative annexesinformative annexes A, B, C should be used.NA.4 References to non-contradictory complementary informationSEtrA, Cable Stays recommendations of French interministerial Commission on
34、 Prestressing (2002), France 1.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 05:54, Uncontrolled Copy, (c) BSIBritiSh StANdArd BSI 2008 7NA to BS EN 1993-1-11:2006BibliographyStandards publicationsFor dated references, only the edition cited applies. For undated references, the l
35、atest edition of the referenced document (including any amendments) applies.BS 2000-121, Methods of test for petroleum and its products Part 121: Determination of oil separation from lubricating grease Pressure filtration methodBS EN iSO 180, Plastics Determination of Izod impact strengthBS EN iSO 5
36、27-3, Plastics Determination of tensile properties Part 3: Test conditions for films and sheetsBS EN iSO 868, Plastics and ebonite Determination of indentation hardness by means of a durometer (Shore hardness)BS EN iSO 1133, Plastics Determination of the melt mass-flow rate (MFR) and the melt volume
37、-flow rate (MVR) of thermoplasticsBS EN iSO 1183-2, Plastics Methods for determining the density of non-cellular plastics Part 2: Density gradient column methodBS EN iSO 2160:1998, Petroleum products Corrosiveness to copper Copper strip testBS EN iSO 9227, Corrosion tests in artificial atmospheres S
38、alt spray testsBS iSO 178, Plastics Determination of flexural propertiesiSO 2207, Petroleum waxes Determination of congealing pointiSO 4437, Buried polyethylene (PE) pipes for the supply of gaseous fuels Metric series SpecificationsiSO 6964, Polyolefin pipes and fittings Determination of carbon blac
39、k content by calcination and pyrolysis Test method and basic specificationiSO/tr 10837, Determination of the thermal stability of polyethylene (PE) for use in gas pipes and fittingsAStM d217, Standard Test Methods for Cone Penetration of Lubricating Grease1)AStM d445-06, Standard Test Method for Kin
40、ematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)1)AStM d942, Standard Test Method for Oxidation Stability of Lubricating Greases by the Oxygen Bomb Method1)AStM d1693-07, Standard Test Method for Environmental Stress-Cracking of Ethylene Plastics1)AStM d3350,
41、 Standard Specification for Polyethylene Plastics Pipe and Fittings Materials1)1)Available from AStM international, 100 Barr harbor drive, PO Box C700, West Conshohocken, PA, 19428-2959 USA; http:/www.astm.org.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 05:54, Uncontrolled Copy
42、, (c) BSINA to BS EN 1993-1-11:20068 BSI 2008BritiSh StANdArdOther publications1 SEtrA, Cable Stays recommendations of French interministerial Commission on Prestressing (2002), France.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 05:54, Uncontrolled Copy, (c) BSIThis page delibe
43、rately left blankLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 18/03/2009 05:54, Uncontrolled Copy, (c) BSIBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by R
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