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The Use of BS 5400 Part 10 1980 Code of Practice for Fatigue
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TRANSPORT INFRASTRUCTURE IRELAND TII PUBLICATIONS, Transport Infrastructure Ireland TII is responsible for managing and improving the country s. national road and light rail networks,About TII Publications. TII maintains an online suite of technical publications which is managed through the TII. Publications website The contents of TII Publications is clearly split into Standards and. Technical documentation All documentation for implementation on TII schemes is collectively. referred to as TII Publications Standards and all other documentation within the system is. collectively referred to as TII Publications Technical This system replaces the NRA Design. Manual for Roads and Bridges NRA DMRB and the NRA Manual of Contract Documents for. Road Works NRA MCDRW,Document Attributes, Each document within TII Publications has a range of attributes associated with it which allows. for efficient access and retrieval of the document from the website These attributes are also. contained on the inside cover of each current document for reference For migration of. documents from the NRA and RPA to the new system each current document was assigned with. new outer front and rear covers Apart from the covers and inside cover pages the documents. contain the same information as previously within the NRA or RPA systems including historical. references such as those contained within NRA DMRB and NRA MCDRW. Document Attributes, TII Publication Title The Use of BS 5400 Part 10 1980 Code of Practice for Fatigue. TII Publication,AM STR 06001,Activity Asset Management Standards.
Document Set,Maintenance AM,Stream Structures STR Publication Date June 2014. Document 06001 Historical NRA BA 9,Number Reference. NRA DMRB and MCDRW References, For all documents that existed within the NRA DMRB or the NRA MCDRW prior to the launch of. TII Publications the NRA document reference used previously is listed above under historical. reference The TII Publication Number also shown above now supersedes this historical. reference All historical references within this document are deemed to be replaced by the TII. Publication Number For the equivalent TII Publication Number for all other historical. references contained within this document please refer to the TII Publications website. Volume 3 Section 5,NRA BA 9 14,The Use of BS 5400 Part 10 1980 Code of. Practice for Fatigue, St Martin s House Waterloo Road Dublin 4 Tel 353 1 660 2511 Fax 353 1 668 0009.
Email infoDMRB nra ie Web www nra ie, This standard which covers the use of BS 5400 Part 10 1980 Code of Practice for Fatigue has been. superseded by the Eurocodes but may be used for Assessment purposes. Published by National Roads Authority Dublin 2014,NRA DESIGN MANUAL FOR ROADS AND BRIDGES. VOLUME 3 HIGHWAY STRUCTURES,INSPECTION AND,MAINTENANCE. SECTION 5 STANDARDS AND ADVICE,NOTES SUPERSEDED BY. THE EUROCODES BUT,REQUIRED FOR,ASSESSMENT,NRA BA 9 14.
THE USE OF BS 5400 PART 10 1980 CODE,OF PRACTICE FOR FATIGUE. 1 Implementation,2 Enquiries, Annex A BA 9 81 The Use of BS 5400 Part 10 1980 Code. of Practice for Fatigue,June 2014 i,National Roads Authority Volume 3 Section 5. Design Manual for Roads and Bridges Part 1 NRA BA 9 14. 1 IMPLEMENTATION, 1 1 The use of BS 5400 Part 10 1980 Code of Practice for Fatigue has been superseded by the. Eurocodes for Design but may still be required in the Assessment of an existing structure Refer to. NRA TB 4 The Structural Eurocodes for further information in this regard. 1 2 This NRA BA 9 standard covers the use of BS 5400 Part 10 1980 Code of Practice for Fatigue. and shall only be used as referenced from an Assessment Standard contained within Section 4 of. Volume 3 of the NRA DMRB, Annex A BA 9 81 The Use of BS 5400 Part 10 1980 Code of Practice for Fatigue.
1 3 Annex A contains BA 9 81 The Use of BS 5400 Part 10 1980 Code of Practice for Fatigue. June 2014 1,National Roads Authority Volume 3 Section 5. Design Manual for Roads and Bridges Part 1 NRA BA 9 14. 2 ENQUIRIES, 2 1 All technical enquiries or comments on this document or any of the documents listed as forming part. of the NRA DMRB should be sent by e mail to infoDMRB nra ie addressed to the following. Head of Network Management Engineering Standards Research. National Roads Authority,St Martin s House,Waterloo Road. Head of Network Management,Engineering Standards Research. June 2014 2,National Roads Authority Volume 3 Section 5.
Design Manual for Roads and Bridges Part 1 NRA BA 9 14. ANNEX A BA 9 81 THE USE OF BS 5400 PART 10,1980 CODE OF PRACTICE FOR. A 1 This annex contains BA 9 81 The Use of BS 5400 Part 10 1980 Code of Practice for Fatigue. THE HIGHWAYS AGENCY BA 9 81,Amendment No 1 dated,November 1983. THE SCOTTISH OFFICE DEVELOPMENT DEPARTMENT,THE WELSH OFFICE. Y SWYDDFA GYMREIG,THE DEPARTMENT OF,THE ENVIRONMENT FOR NORTHERN IRELAND. The Use of BS 5400 Part 10 1980,Code of Practice for Fatigue.
Summary This Departmental Advice Note give guidance on the use of BS 5400 Part 10. for the fatigue assessment of highway bridges,DESIGN MANUAL FOR ROADS AND BRIDGES. VOLUME 1 HIGHWAY,STRUCTURES,PROCEDURES AND,GENERAL DESIGN. SECTION 3 GENERAL DESIGN,THE USE OF BS 5400 PART 10 1980. CODE OF PRACTICE FOR FATIGUE,2 Details Outside the Code. 4 General Guidance,5 Enquiries,Appendix 1 Tables A B C and D.
December 1981,Volume 1 Section 3 Chapter 1,BA 9 81 Scope. 1 1 This Advice Note gives advice on the fatigue assessment of certain structural details which are at present. outside the scope of BS 5400 Part 10, 1 2 It also contains condensed load spectra for highway loading which will reduce the amount of computation in. those cases where an explicit calculation of Miner s summation 8 4 is necessary. 1 3 The Note also gives some general advice regarding fatigue sensitive areas in steel concrete composite. structures and a warning concerning the fatigue strength of details constructed from thick plates. The numbers in brackets are the relevant clause numbers in BS 5400 Part 10. December 1981 1 1,Volume 1 Section 3 Chapter 2,BA 9 81 Details Outside the Code. 2 DETAILS OUTSIDE THE CODE,2 1 Orthotropic Steel Decks 1 5 1 and 5 4. Designers of orthotropic steel decks subjected to fatigue loading should consult the Bridges Engineering Design. Standards Division for advice concerning their stress analysis and detail classification The criteria to be adopted in the. design should however be dealt with in accordance with the procedure given in the Departmental Standard BD 2 79. 2 2 Reinforcement 1 5 2, R D Work on the fatigue performance of unwelded reinforcing bars is not complete but when it is finished it is.
intended to establish a new classification class R which will cover such bars and which will be similar in format and. application to the various design curves of structural details already incorporated in Part 10 Other work on the. application of such a classification to the fatigue assessment of reinforced concrete structures under highway loading. indicate that it should be possible to exempt certain aspects of reinforced concrete designs from fatigue checks The use. of the R classification will be backed up by a quality assurance scheme for reinforcing bars which will include. performance criteria under fatigue loading In the meantime the exemsption given in BS 5400 Part 4 for unwelded. reinforcement will continue to apply,2 3 Socketed Steel wire Cables. It should be noted that steel iore cables such as those used as hangers in suspension bridges and whose ends terminate. in conventional sockets are liable to fatigue damage at the cable socket interface The damage can occur both in cables. subjected to fluctuating tension and in cables under constant tension but subjected to lateral oscillations In the latter. case the fatigue lives appear to be sensitive to the degree of restraint against rotation which occurs at the end. connection Sufficient data are not available at present to allow general design rules to be formulated and it is suggested. that appropriate test results should be used to examine cases where fatigue is likely to be a problem The criteria to be. adopted in design should however be dealt with in accordance with the procedure given in the Departmental Standard. December 1981 2 1,Volume 1 Section 3 Chapter 3,BA 9 81 Loading. 3 1 Condensed Spectra, In cases where an explicit determination of Miner s summation is to be carried out in accordance with BS 5400 Part 10. 8 4 using the standard load spectra of Table 11 of Part 10 the condensed spectra for vehicle and axle weights given in. Tables A and B in Appendix I of this Advice Note may be used instead of the full gross weight and axle weight spectra. given in Tables 13 and 14 respectively in Part 10 These condensed tables may be used with any of the detail. classification given in Part 10 and with the proposed class R. 3 2 Standard Wheel Contact Area, When the standard axle or standard wheel 7 2 2 2 is used in conjunction with the commercial vehicle axle weight. spectrum in Table 14 of Part 10 or in Table B in Appendix I for instance doing and explicit Miner s summation the. wheel contact area may be varied on the basis of a constant pressure of 0 5 N mm2 for each particular axle or wheel. December 1981 3 1,Volume 1 Section 3 Chapter 4,BA 9 81 General Guidance.
4 GENERAL GUIDANCE,4 1 Composite steel concrete structures. Some studies have recently been undertaken on the fatigue assessment of steel concrete deck composite structures. Whilst the studies were related to a particular series of designs some of the findings have a more general application. a For the standard type of stud shear connector which meet the requirements of Part 5 use may be made. of Tables C or D in Appendix I of this Advice Note to assess whether or not the connectors need to be checked. for fatigue when they are used in simply supported longitudinal girders Both tables are based on the. assumption that the connectors meet the minimum static strength design requirements of Part 5 Table C. covers the design of normal highway bridges which are subjected to both HA and HB types of loading as. specified in Part 2 of BS 5400 Table D is for accommodation bridges which have limited usage and which are. designed for HA loading only Table C illustrates a general conclusion from the studies in that the design of. stud connectors is likely to be governed by static considerations at the ends of a span but is likely to be. governed by fatigue considerations at mid span It should be noted that some conservative assumptions have. been made in deriving these tables thus even though a table may indicate that the fatigue strength or life is. inadequate the connector may be found to be satisfactory when detailed calculations are carried out. b Where a transverse diaphragm is connected to the bearing stiffeners of the main beams fairly. considerable moments will need to be resisted by the stiffener web weld due to the deflection of the diaphragm. and associated deck The resultant stresses may cause a fatigue problem and the web stiffener weld may need. to be upgraded for instance by specifying a full penetration butt weld in order to provide sufficient fatigue. 4 2 Thickness effects, The classification of details in Table 17 in Part 10 and the corresponding design curves in Fig 14 are derived from tests. on relatively thin specimens typically 12mm thick Recent experimental work using thicker specimens has shown that. fatigue strength can decrease substantially with increase in thickness Whilst the experimental data available is not yet. sufficient to enable new design rules to be formulated it is nevertheless recommended that for critical details the. following precautions should be taken, a For plates less than 40 mm and greater than 12 mm the effective design life should be taken as. calculated design life x 1 0 02 t 12,where t plate thickness mm. b For plates less than 100 mm and greater than or equal to 40 mm the effective design life should be. calculated design life x 0 44 0 004 t 40,4 3 Design of Details.
For some structures such as footbridges the appropriate fatigue loading criteria are not specified and it is therefore. difficult to assess the fatigue lives of particular welded joints In other cases some welded joints may be assumed in. design to be non load carrying although in fact they will carry an uncertain amount of load due to displacements within. the structure In both such cases care should be taken over the design of the details in question and if possible the use of. fillet welded connection with a classification inferior to class F should be avoided. November 1983 4 1,Volume 1 Section 3 Chapter 5,BA 9 81 Enquiries. 5 ENQUIRIES, Technical enquiries arising from the application of this Advice Note to a particular project should be addressed to the. appropriate Technical Approval Authority, All other technical enquiries or comments should be addressed to. Assistant Chief Engineer,Bridges Engineering Standards Division. Department of Transport,St Christopher House,Southwark Street.
LONDON SE1 0TE, All enquiries concerning the distribution of this Advice Note should be addressed to. Administration of Road Construction 1,Department of Transport. Room S7 23,2 Marsham Street,LONDON SW1P 3EB,Telephone No 01 212 4944.

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