●　Recent Development in Maintenance for Prestressed Concrete Bridges of 　　 Expressway in Japan 　　 Kenji KUBOTA				24
●　Retrofitting of PC Slabs 　　 Takeshi KAMIKI				29
●　Retrofitting of End of Prestressed Concrete Girder (Chugoku Expressway 　　 Kaminishikawa Bridge) 　　 Hiroyuki YAMAHA, Hisashi OKADA				37
●　Reinforcement of Cast-in-Place Concrete in Prestressed Concrete T-section 　　 Girder of Metropolitan Expressway Haneda Line 　　 Mitsutoshi TOMIOKA, Satoru KOIDE, Naoyoshi KAWADA				45
●　Replacement of Large sized Bearings on the PC Box Girder Bridge 　　 ―The Widening Work of Higashi-Futami Bridge― 　　 Tomio HAMADA, Hideya YAMAMOTO, Yoshimichi HASHIMOTO, 　　 Yasushi YAMANAKA				51
●　Strengthening with Suprestructure Continuation of Existing PC Bridge 　　 (HONTANIGAWA Bridge No.3) 　　 Hiroshi ITOU，Seiji TOMITA，Fumihiro OBARA，Sinichirou TAKI				59
●　Reinforcement and Renair Work on the Pier of Aoumi Wharf. 　　 ―The Progress of Function of the Pier by External Cable and Preventive Maintenance― 　　 Makoto OSANAI, Akira HAGINO, Hiroaki MIYAWAKI, Soushu MIYAZAKI				67
●　Report of Reinforcement Work of the Beam with External Tendons 　　 Masakazu SENOO				77
●　Seismic Strengthening by the Outside Frame that Built in the Friction Controlled Brace 　　 with Precast Prestresing Technique. 　　 ―The Construction Report of the Public Housing in Muroran City― 　　 Seiichi NIHEI, Tetsuya KIDUKI, Masahiko NISHIDA, Seiichi KATOU				81
●　Repair and Strengthening of Prestressed Concrete Bridge 　　 Koji OSADA, Syoji NOJIMA, Masaaki SATO, Yuzuru HAMADA				87
●　Concrete for Environmental Structures 　　 Foreign Information Reseach group				93
●　Report on the Symposium“Durability and Maintenance of Concrete Structures”in Croatia 　　 Kyoji NIITANI, Shoji IKEDA				96
●　Report on“Committee on Analysis of Anchorage Zone of Prestressed Concrete 　　 Box Girder”(Part 2) 　　 Tada-aki TANABE, Yuichi UCHIDA				100