複合炭素繊維補強コンクリート造シェルの耐力

概要

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This study concerns the strength of concrete shell structures reinforced with composite carbon fiber, which consists of carbon fiber chips and carbon fiber sheets. The glue work between the concrete shell surface and the carbon fiber sheets had imperfections in our previous study, so the strength of concrete reinforced with carbon fiber sheets could not be confirmed in the previous experiments. Accordingly, in this study, more precise careful glue work was attempted so that reasonable experimental results were achieved in comparison with numerical results. In the experimental study, small-scale cylindrical shell specimens with four kinds of regions reinforced with carbon fiber sheets were applied with a single static point load until fractural states were attained. In the theoretical study, material and geometrical nonlinear finite element analyses including tension cutoff and tension stiffening effects were adopted to compare the results of the fractural experiments. The strength of concrete shells reinforced with composite carbon fiber is discussed on the basis of the results of the fractural experiments and numerical analysis while taking the effects of shell thickness into consideration.