Strengthening Prestressed-Concrete Girders with Externally Prestressed PBO Fiber Reinforced Polymer Sheets
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Published:2003-09
Issue:14
Volume:22
Page:1269-1286
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ISSN:0731-6844
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Container-title:Journal of Reinforced Plastics and Composites
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language:en
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Short-container-title:Journal of Reinforced Plastics and Composites
Author:
Wu Z. S.1, Iwashita K.1, Hayashi K.2, Higuchi T.3, Murakami S.4, Koseki Y.5
Affiliation:
1. Department of Urban & Civil Engineering Ibaraki University Nakanarusawa 4-12-1, Hitachi 316-8511, Japan 2. ABE KOGYO SYO Co., Ltd. 3-13-3 Rokujyo-omizo, Gifu 500-8357 Japan 3. TOHO EARTHTECH, Inc. COMS Bldg., 2-3 Uguisudani-cho Shibuya-ku, Tokyo 150-0032 Japan 4. Nippon Steel Composite Co., Ltd. Ohara Bldg., 3-8 Nihonbashikobuna-cho Chuo-ku, Tokyo 103-0024 Japan 5. TOYOBO Co., Ltd. 2-8 Dojima Hama 2 Chome Kita-ku, Osaka 530-8230 Japan
Abstract
This study aims at developing an innovative strengthening system with externally bonded prestressed PBO (short for Polypara-phenylene-Benzo-bis-Oxazole) fiber reinforced polymer (PFRP) sheets, which present equal or higher strength and stiffness in comparison with high strength type of carbon fiber reinforced polymer (CFRP) sheets and great performance in energy absorption superior than other fiber reinforced polymer (FRP) sheets such as aramid and carbon FRP sheets. An experimental program was carried out to confirm the strengthening effects on load-carrying capacity, stiffness characteristics, ductility, and resistance of crack opening of prestressed concrete girders. The main parameters studied are the prestress level, the number of PFRP sheet layers, and resin impregnation of PBO fibers before or after sheet prestressing. An analytical study is also performed in order to investigate the flexural behavior of PC girders strengthened with prestressed PFRP sheets.
Publisher
SAGE Publications
Subject
Materials Chemistry,Polymers and Plastics,Mechanical Engineering,Mechanics of Materials,Ceramics and Composites
Reference6 articles.
1. 1. Triantafillou, T.C. and Deskovic, N. (1991). Innovative Prestressing with FRP Sheets, Mechanics of Short-term Behavior , Journal of Engineering Mechanics, ASCE, 117(7): 1653-1672 . 2. 4. Wu, Z.S., Matsuzaki, T.Fukuzawa, K. and Kanda, T. (2000). Strengthening Effects on RC Girders with Externally Prestressed Carbon Fiber Sheets , Journal of Material, Concrete Structures and Pavements, JSCE, 153-165 . 3. 5.Wu, Z.S., Iwashita, K., Hayashi, K., Higuchi, T., Murakami, S. and Koseki, Y. (2002). Strengthening Method for RC structures with Externally Prestressed PBO Fiber Sheets , Journal of The Japan Society for Composite Materials, 28(4): 146-155 . 4. 6. Wu, Z.S., Iwashita, K., Hayashi, K., Higuchi, T., Murakami, S. and Hirahata, H. (2001). Strengthening RC Girders with Externally Prestressed PBO Fiber Sheets, Retrofit of Concrete Structures in Performance-based System , Concrete Engineering Series, 42: II-43-II-50 . 5. 8. Hanamori, N., Wu, Z.S., Iwashita, K. and Higuchi, T. (2001). Experimental Study on Strengthening Method of PC Flexural Structures with Externally Bonded Prestressed PBO Fiber Sheet , Proceeding of the Japan Concrete Institute, 23(1): 1099-1104 .
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