静的線荷重を受ける炭素短繊維補強コンクリート造開口部付円筒殻の終局耐力

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The main purpose of this paper is to investigate both experimentally and theoretically, the strength of carbon fiber chip reinforced concrete roof-type circular cylindrical shells with openings within the shell surface under line load. Carbon fiber chip reinforced concrete was made of concrete reinforced with mixed-in carbon fiber chips and without steel reinforcing. This material could be able to be fit to arbitrary shapes so that any three-dimensional curved surfaces would be easily constructed. Furthermore higher isotropy and homogeneity in comparison with standard steel reinforced concrete could be realized. On the other hand, the openings within a concrete shell surface allow light to come in through the structure so that the interior space of the shell is brightened. However, the shell strength and nonlinear behavior could be hardly estimated, because the opening and the line load induce stress disturbances into shell structures. In this paper the shell was subjected to line load on the central line parallel to the circular directrix. The variable parameters of the line load are length and density pattern. The experimental study was conducted on carbon fiber chip reinforced and standard steel reinforced concrete shell specimens. Line load was applied perpendicularly on the shell surface to the final failure states. The theoretical study was conducted using the material and geometrical nonlinear finite element analyses. The concrete shell strength could be much influenced by the distribution on the actual shell thickness variance, so that nonlinear numerical calculations including discrete shell thickness patterns were carried out. The ultimate strength under line load was discussed based on the results of the experiments and analyses.
東海大学の論文

静的線荷重を受ける炭素短繊維補強コンクリート造開口部付円筒殻の終局耐力

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