CONCRETE LIBRARY OF JSCE NO. 31, JUNE 1998

RECENT TRENDS IN PRESTRESSED CONCRETE STRUCTURESWITH EXTERNAL CABLES

(Translation from Proceedings of JSCE, No.550/V—33, November 1996)

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kazuo KOBAYASH I

External prestressing is coming into wide use, and recently the number of prestressed concretebridges using external cables (tendons) has been increasing remarkably. External prestressinghas been used to rehabilitate damaged concrete structures as well as for new ones. ln thispaper, the structural behavior of externally prestressed concrete beam members and the strengthof external tendon anchorages and deviators, as well as analytical methods for them, arereviewed. Some typical examples of the rehabilitation of damaged concrete bridges are alsocovered. In addition, several major structural design provisions for external prestressing aredescribed.

Keywords : external pres tressing, struc tura] behavior, analysis, design, reliabil i ta tion

Kazuo Kobayashi is a professor in the Department of Civil Engineering at the Osaka lnstitute ofTechnology, Osaka, Japan. He received his Dr. Eng. from Kyoto University in 197 3. He hasauthored several books and numerous papers on the behavior and analysis of reinforced andprestressed concrete structures. He is a fellow of the JSCE.

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