P398: Joints in Steel Construction: Moment-Resisting ...

1 Joints in Steel construction : moment - resisting Joints to eurocode 3 SCI (The Steel construction Institute) is the leading, independent provider of technical expertise and disseminator of best practice to the Steel construction sector. We work in partnership with clients, members and industry peers to help build businesses and provide competitive advantage through the commercial application of our knowledge. We are committed to offering and promoting sustainable and environmentally responsible service spans the following areas: MembershipIndividual and corporate membershipAdviceMembers advisory serviceInformationPublicationsEducationE vents & trainingConsultancyDevelopmentProduct developmentEngineering supportSustainabilityAssessmentSCI AssessmentSpecificationWebsitesEngineeri ng softwareThe Steel construction Institute, Silwood Park, Ascot, Berkshire, SL5 : +44 (0)1344 636525 Fax: +44 (0)1344 636570 Email.

2 Limited is the national organisation for the Steel construction industry; its Member companies undertake the design, fabrication and erection of steelwork for all forms of construction in building and civil engineering. Associate Members are those principal companies involved in the direct supply to all or some Members of components, materials or products. Corporate Members are clients, professional offices, educational establishments etc which support the development of national specifications, quality, fabrication and erection techniques, overall industry efficiency and good principal objectives of the Association are to promote the use of structural steelwork ; to assist specifiers and clients; to ensure that the capabilities and activities of the industry are widely understood and to provide members with professional services in technical, commercial, contractual and health & safety matters.

3 The Association s aim is to influence the trading environment in which member companies have to operate in order to improve their British Constructional steelwork Association Limited, 4 Whitehall Court, London, SW1A : +44 (0)20 7839 8566 Fax: +44 (0)20 7976 1634 Email: Publication P398 Joints in Steel construction Moment-Resisting Joints to Eurocode 3 Jointly published by: The Steel construction Institute Silwood Park Ascot SL5 7QN The British Constructional steelwork Association Limited 4 Whitehall Court London SW1A 2ES Tel: +44 (0) 1344 636525 Fax: +44 (0) 1344 636570 Email: Website: Tel: +44 (0) 20 7839 8566 Fax: +44 (0) 20 7976 1634 Email: Website.

4 Ii The Steel construction Institute and The British Constructional steelwork Association 2013 Apart from any fair dealing for the purposes of research or private study or criticism or review, as permitted under The copyright Designs and Patents Act 1988, this publication may not be reproduced, stored, or transmitted, in any form or by any means, without the prior permission in writing of the publishers, or in the case of reprographic reproduction only in accordance with the terms of the licences issued by the UK Copyright Licensing Agency, or in accordance with the terms of licences issues by the appropriate Reproduction Rights Organisation outside the UK.

5 Enquiries concerning reproduction outside the terms stated here should be sent to the publishers, SCI. Although care has been taken to ensure, to the best of our knowledge, that all data and information contained herein are accurate to the extent that they relate to either matters of fact or accepted practice or matters of opinion at the time of publication, The Steel construction Institute, The British Constructional steelwork Association Limited, the authors and any other contributor assume no responsibility for any errors in or misinterpretations of such data and/ or information or any loss or damage arising from or related to their use.

6 Publications supplied to Members of SCI or BCSA at a discount are not for resale by them. Publication Number: P398 ISBN 978-1-85-942209-0 British Library Cataloguing-in-Publication Data. A catalogue record for this book is available from the British Library. iii FOREWORD This publication is one of a series of Green Books that cover a range of steelwork connections. This publication provides guidance for Moment-Resisting Joints , designed in accordance with Eurocode 3 Design of Steel structures, as implemented by its UK National Annexes. A companion publication, Joints in Steel construction : Simple Joints to Eurocode 3 (P358), covers design of nominally pinned Joints .

7 This publication is the successor to Joints in Steel construction moment connections (P207/95), which covers connections designed in accordance with BS 5950. The major changes in scope compared to P207/95 are: The adoption of the published design rules in BS EN 1993-1-8 and its UK National Annex. Although most checks are almost identical, some differences will be observed, such as the modest revisions to the yield line patterns and the allowance for the effect of shear in the column web panel. Indicative resistances of connections are given, instead of comprehensive standardised details, recognising that software is most often used for the design of Moment-Resisting Joints .

8 The hybrid connections, comprising welded parts and parts connected using pre-tensioned bolts, have been omitted, since they have little use in the UK. The primary drafters of this guide were David Brown and David Iles, with assistance from Mary Brettle and Abdul Malik (all of SCI). Special thanks are due to Alan Rathbone and Robert Weeden for their comprehensive checking of the draft publication. This publication was produced under the guidance of the BCSA/SCI Connections Group, which was established in 1987 to bring together academics, consulting engineers and steelwork contractors to work on the development of authoritative design guides for steelwork connections.

9 The BCSA/SCI Connections Group members, at the date of publication, are: Mike Banfi David Brown Tom Cosgrove Peter Gannon Bob Hairsine Alastair Hughes Fergal Kelley Abdul Malik David Moore Chris Morris David Nethercot Alan Pillinger Alan Rathbone Roger Reed Chris Robinson Clive Robinson Colin Smart Barrie Staley Mark Tiddy Robert Weeden Arup Steel construction Institute BCSA Watson Steel Structures Ltd CADS Consultant Peter Brett Associates Steel construction Institute BCSA Tata Steel Imperial College Bourne construction Engineering Ltd CSC UK Ltd Consultant William Hare Ltd Atlas Ward Structures Ltd Tata Steel Watson Steel

10 Structures Ltd Cooper & Turner Limited Caunton Engineering Ltd iv v CONTENTS PAGE Foreword iii 1 INTRODUCTION 1 About this design guide 1 Eurocode 3 1 Joint classification 2 Costs 2 Major symbols 3 2 BOLTED BEAM TO COLUMN CONNECTIONS 4 Scope 4 Design basis 4 Design method 4 Methods of strengthening 7 Design steps 8 3 WELDED BEAM TO COLUMN CONNECTIONS 42 Scope 42 Shop welded connections 42 Design method 44 Design steps 44 4 SPLICES 51 Scope 51 Bolted cover plate splices 51 Design steps 52 Bolted end plate splices 61 Beam-through-beam moment connections 62 Welded splices 62 5 COLUMN BASES 64 Scope 64 Design basis 64 Typical details 64 Bedding space for grouting 65 Design method 65 Classification of column base connections 65 Design steps 65 6 REFERENCES 76 APPENDIX A EXAMPLES OF DETAILING PRACTICE 77 APPENDIX B INDICATIVE CONNECTION RESISTANCES 79 APPENDIX C WORKED EXAMPLES BOLTED END PLATE CONNECTIONS 81 APPENDIX D WORKED EXAMPLE BOLTED BEAM SPLICE 127 APPENDIX E WORKED EXAMPLE BASE PLATE CONNECTION 141 APPENDIX F WORKED EXAMPLE WELDED BEAM TO COLUMN CONNECTION 151 APPENDIX G ALPHA CHART 163