ＡＦＲＰメッシュとビニロン短繊維混入吹付けコンクリートを併用した補強工法によるＲＣはりの耐力向上効果

概要

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In this paper, in order to develop a rational strengthening method for existing concrete structures, the method using AFRP mesh together with Vinylon short-fiber mixed shotcrete was proposed, and its flexural strengthening effect for RC beans was experimentally discussed. Here, static loading tests of T-shaped RC beams strengthened applying the proposed method were conducted taking AFRP mesh volume as variable. The results obtained from this experiment are as follows; 1) flexural strengthening effects for RC beams in case using proposed method is almost similar to those in case using FRP sheet bonding method; 2) shotcrete is debonded due to peeling action of concrete block formed in the lower cover concrete area in the equi-shear span; 3) debonding behavior of shotcrete is similar to that of FRP sheet in flexural strengthening RC beam, so that a prediction method for failure mode of the RC beams strengthened with FRP sheet can be applied for the case using the proposed method.