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ＩＳＳＮ１３４６－７８４０
港湾空港技術研究所
資料
TECHNICAL NOTE
OF
THE PORT AND AIRPORT RESEARCH INSTITUTE
No.1329 December 2016
防波堤ケーソンにおける部材設計の合理化に関する一考察
宇野 健司
加藤 絵万
川端雄一郎
国立研究開発法人 海上・港湾・航空技術研究所
National Institute of Maritime, Port and Aviation Technology, Japan
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Fundamental study on rational designof structural member of caisson in breakwater
Kenji UNO*Ema KATO**Yuichiro KAWABATA*
Synopsis
Following the performance-based design currently adopted in the Technical Standards and
Commentaries for Port and Harbor Facilities in Japans, design method of structural members
comprising a caisson was discussed. Firstly a comparison between the former and the current
design methods for structural reinforced concrete (RC) members was reviewed; namely
allowable-stress design and limit state design, respectively. Then the critical index for verification
with respect to limit states of structural member in caisson was investigated. According to the result
of investigation, serviceability limit state of structural member turned out to be the most severe
state frequently to determine the structural details such as cross-section and bar arrangement of
structural RC member. Especially the crack width, one of the serviceability limit states, had a great
impact on bar arrangement. These investigations put particular emphasis on the importance of
in-depth discussions of crack width of concrete member in terms of serviceability as well as
durability. These points were summarized, with special references to the standard specification by
Japan Society of Civil Engineers (JSCE) and other related studies.
Key Words: caisson, performance verification, serviceability limit state, crack width
* Senior Researcher, Structural Mechanics Group
** Head, Structural Mechanics Group3-1-1 Nagase, Yokosuka, 239-0826 Japan
Phone +81-46-844-5059 Fax +81-46-844-0255 e-mail:[email protected]���
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Copyright ○C （2016）by MPAT All rights reserved. No part of this book must be reproduced by any means without the written permission of the President of MPAT この資料は、海上・港湾・航空技術研究所理事長の承認を得て刊行したものである。したがって、
本報告書の全部または一部の転載、複写は海上・港湾・航空技術研究所理事長の文書による承認を
得ずしてこれを行ってはならない。
港湾空港技術研究所資料 No.1329
２０１６．１２
編集兼発行人 国立研究開発法人海上・港湾・航空技術研究所
発 行 所 港 湾 空 港 技 術 研 究 所 横 須 賀 市 長 瀬 ３ 丁 目 １ 番 １ 号
TEL. 046(844)5040 URL. http://www.pari.go.jp/
印 刷 所 株 式 会 社 シ ー ケ ン
