A STUDY ON STRENGTHENING OF STEEL BRIDGES BY THERMAL PRESTRESSING METHOD

概要

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Many highway bridges built in the high economic growth period become ageing, and it is important to extend the life of these bridges as precious social capital. The typical conventional strengthening methods for the steel bridges are splice reinforcement and/or external cable reinforcement methods, however the cost performance of those methods is not so remarkable. A new strengthening process by using the thermal prestressing method was developed herein. By this thermal prestressing method, the load carrying capacity of bridges can be upgraded to B-class live load. In addition, the durability and the life cycle cost of bridges can be improved effectively In this paper, also predicated is an example of strengthening through analytical calculation of continuous girder by using the thermal prestressing method.
社団法人　土木学会の論文