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Determination of the Initial Tendon Force using Rating Factor Equation in Composite Girders Strengthened with External Tendons  

Choi, Dong Ho (한양대학교 토목공학과)
Chung, Sang Hwan (한양대학교 토목공학과)
Yoo, Dong Min (한양대학교 토목공학과)
Publication Information
Journal of Korean Society of Steel Construction / v.17, no.5, 2005 , pp. 527-536 More about this Journal
Abstract
A method of reinforcement using external tendons has been found to be one of the effective techniques of reinforcement and its application is increasing. In this paper, the method to calculate the initial tendon force is proposed for the improvement of load-carrying capacity in existing steel-concrete composite bridges. An equation for the increment of tendon force was derived for tendon configurations and live load types, and the effect of reinforcement in a composite beam was numerically studied. The method to calculate the number of tendon and initial tendon force was presented by proposing the new method to calculate the rating factor, which considers the increment of tendon force. The method was shown to be effective for an existing steel-concrete bridge.
Keywords
external tendon; composite girder; initial tendon force; increment of tendon force; tendon configuration; rating factor;
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