EVALUATION OF THE EFFECT OF RC SEGMENT CURVATURE ON REINFORCEMENT METHOD USING CONTINUOUS FIBER SHEETS

Abstract

 There is a reinforcement method using the continuous fiber sheet for reinforced concrete whose bending strength has decreased due to deterioration. However, the reinforcing effect when applied to arc-shaped members such as shield segments remains unclear. Therefore, in this study, the influence on the reinforcing effect was analyzed by a structural model that reproduced the bending test of the segment reinforced by the continuous fiber sheet. As a result, it was found that in the arc-shaped member, additional stress is generated in the tunnel radial direction on the continuous fiber sheet, and the reinforcing effect is reduced as the inner diameter is smaller and the curvature is larger. In this paper, we show the calculation method of the peel fracture strength of the continuous fiber sheet when it is affected by the curvature, and propose the reinforcement design method.