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P R O C E E D I N G S OF THE 15th INTERNATIONAL SHIP AND O F F S H O R E STRUCTURES CONGRESS VOLUME Elsevier Internet Homepage: http://www.elsevier.com Consult the Elsevier homepage for full catalogue information on all books, journals and electronic products and services Elsevier Titles of Related Interest Ocean Engineering Series WATSON Practical Ship Design ISBN: 008-042999-8 YOUNG Wind Generated Ocean Waves 1SBN: 008-043317-0 BAI Pipelines and Risers ISBN: 008-043 712-5 JENSEN Local and Global Response of Ships ISBN: 008-043953-5 TUCKER & PITT Waves in Ocean Engineering ISBN: 008-043566-1 OWENS Steel in Construction (CD-ROM Proceedings with Printed Abstracts Volume, 268 papers) ISBN: 008-042997-1 GODOY Thin-Walled Structures with Structural Imperfections: Analysis and Behavior ISBN: 008-042266-7 FUKUMOTO Structural Stability Design ISBN." 008-042263-2 GUEDES-SOARES Advances in Safety and Reliability (3 Volume Set) ISBN: 008-042835-5 Other Titles CHAN & TENG ICASS '02, Advances in 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and media can be considered Should you have a publishing proposal you wish to discuss, please contact, without obligation, the publisher responsible for Elsevier's civil and structural engineering publishing programme: James Sullivan Publishing Editor Elsevier Ltd The Boulevard, Langford Lane Kidlington, Oxford OX5 1GB, UK Phone: Fax: E.mail: +44 1865 843178 +44 1865 84392 j.sullivan@elsevier.com General enquiries, including placing orders, should be directed to Elsevier's Regional Sales Offices - please access the Elsevier homepage for full contact details (homepage details at the top of this page) P R O C E E D I N G S OF THE 15th I N T E R N A T I O N A L SHIP AND O F F S H O R E S T R U C T U R E S C O N G R E S S VOLUME Edited by A.E MANSOUR University of California, Berkeley, USA and R.C ERTEKIN University of Hawaii, Honolulu, USA qy~oBESTt~tH^ o~Y" ~ ~,~'~'~ IEGO, 2003 ELSEVIER Amsterdam - Boston - Heidelberg - London - New York - Oxford- San Diego - San Francisco - Singapore - Sydney - Tokyo Paris ELSEVIER SCIENCE Ltd The Boulevard, Langford Lane Kidlington, Oxford OX5 1GB, UK 2003 Elsevier Science Ltd All rights reserved This work is protected under copyright by Elsevier Science, and the following terms and conditions apply to its use: Photocopying Single photocopies of single chapters may be made for personal use as allowed by national copyright laws Permission of the Publisher and payment of a fee is required for all other photocopying, including multiple or systematic copying, copying for advertising or promotional purposes, resale, and all forms of document delivery Special rates are available for educational institutions that wish to make photocopies for non-profit educational classroom use Permissions may be sought directly from Elsevier's Science & Technology Rights Department in Oxford, UK: phone: (+44) 1865 843830, fax: (+44) 1865 853333, e-mail: permissions@elsevier.com You may also complete your request on-line via the Elsevier Science homepage 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part of a chapter Except as outlined above, no part of this work may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without prior written permission of the Publisher.Address permissions requests to: Elsevier's Science & Technology Rights Department, at the phone, fax and e-mail addresses noted above Notice No responsibility is assumed by the Publisher for any injury and/or damage to persons or property as a matter of products liability, negligence or otherwise, or from any use or operation of any methods, products, instructions or ideas contained in the material herein Because of rapid advances in the medical sciences, in particular, independent verification of diagnoses and drug dosages should be made First edition 2003 Library of Congress Cataloging in Publication Data A catalog record from the Library of Congress has been applied for British Library Cataloguing in Publication Data A catalogue record from the British Library has been applied for ISBN: 0-08-044076-2 The paper used in this publication meets the requirements of ANSI/NISO Z39.48-1992 (Permanence of Paper) Printed in The Netherlands PREFACE This volume contains the Specialist Committee and Special Task Committee reports that will be presented and discussed at the 15th International Ship and Offshore Structures Congress (ISSC 2003)in San Diego, USA, 11-15 August, 2003 Volume contains the Technical Committee reports Volume will include the discussions of the reports, the chairmen's reply, the text of the invited lecture and the congress report of ISSC 2003, and it will appear in 2004 The Standing Committee of the 15th International Ship and Offshore Structures Congress in San Diego is: Chairman: Secretary: Prof A.E Mansour Prof J.L Armand Prof B Boon Dr M Dogliani USA France The Netherlands Italy Prof W Fricke Germany Dr P.A Frieze UK Prof Prof Prof Prof Korea Poland Denmark Norway C.D Jang T Jastrzebki J.J Jensen T Moan Prof H Ohtsubo Dr N Pegg Prof Y.S Wu Prof R.C Ertekin Japan (ex officio) Canada China USA On behalf of the Standing Committee and members of the ISSC, I would like to thank the American Bureau of Shipping and the Ship Structure Committee for their financial support of ISSC 2003 The support of the City of San Diego is also gratefully acknowledged Berkeley, USA March 2003 Alaa E Mansour Chairman This Page Intentionally Left Blank CONTENTS Preface , V REPORT OF SPECIALIST COMMITTEE V1: RISK ASSESSMENT REPORT OF SPECIALIST COMMITTEE V2: INSPECTION AND MONITORING REPORT OF SPECIALIST COMMITTEE V3: COLLISION AND GROUNDING 71 REPORT OF SPECIALIST COMMITTEE V4: STRUCTURAL DESIGN OF HIGH SPEED VESSELS , 109 REPORT OF SPECIALIST COMMITTEE VS: FLOATING PRODUCTION SYSTEMS 149 REPORT OF SPECIALIST COMMITTEE V6: FABRICATION TECHNOLOGIES 189 REPORT OF SPECIAL TASK COMMITTEE V1.l: FATIGUE LOADING 37 235 REPORT OF SPECIAL TASK COMMITTEE V1.2: FATIGUE STRENGTH ASSESSMENT 285 Indexes vii 327 This Page Intentionally Left Blank 15th INTERNATIONAL SHIP AND OFFSHORE STRUCTURE CONGRESS 2003 11-15 AUGUST 2003 SAN DIEGO, USA VOLUME /EGO, SPECIALIST C O M M I T T E E V.1 RISK ASSESSMENT MANDATE Concern for the development of rational procedures for qualitative and quantitative risk assessment of ships This shall include assessment of probability and consequence of accidental situations as well as evaluation of measures to control and mitigate the risk Particular attention shall be paid to fire and explosion, extreme environmental condition, human element, traffic and obstructions, and operational hazards MEMBERS Chairman: Dr William Moore Professor Y Chert Mr A Dinovitzer Professor O Litonov Dr Marc Prevosto Dr Angelo Tonelli Professor Y.S Yang Mr Koichi Yoshida KEYWORDS Risk assessment, risk analysis, formal safety assessment, hazard, accident, consequence, frequency, probability, cost, benefit 316 Special Task Committee VI.2 compressive mean stress The load history is shown in Table and Figure 22 One loading set consisted of 10 blocks, and the number of cycles in each block was 10,000, i.e., the number of cycles of each set was 105 p ~ Figure 22 Block program loading TABLE DETAILS OF THE BLOCKLOADINGPROGRAM Block no 10 AP/2 (kN) 68 136 203 136 68 68 136 203 136 68 Pm (kN) 248 248 248 248 248 -248 -248 -248 -248 -248 Measured hot spot stress amplitude during the test is shown in Figure 23 Surface fatigue cracks only initiated at the weld toe of bilge knuckle part of centre floor After 2.105 cycles the hot spot stress at this location started to decrease, indicating crack initiation Applying the % drop criterion, fatigue crack initiation had taken place at 4.8.105 cycles The test ran for 1.23.106 cycles At this stage the fatigue crack surface was investigated Contours of the crack at various stages are shown in Figure 24 At 38 or 48.104 cycles of fluctuating load, many surface fatigue cracks had been initiated at the weld toe Subsequently they were combined into a shallow and broad surface crack, which propagated from around the centre of the transverse floor in the depth direction At end of test the crack was nearly through thickness Z \ 0.8 0.6 ~ w~. ~ 0.4 "~i:,.~ -~PLATE BOTTOM ~ ~ ' x ~ " ~9 0.2 ~