円形曲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裁断半球殻の終局耐力

概要

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The main purpose of this paper is to investigate both experimentally and theoretically, the strength and failure patterns of carbon fiber chip reinforced concrete truncated hemispherical shells under circular curve load. Arbitrary three-dimensional curved surface with irregular boundaries could be constructed easily by applying carbon fiber chip reinforced concrete, because of its smooth construction process without steel bar reinforcing. However, the mechanical behavior on such a concrete shell in the linear and nonlinear fields could be hardly estimated. As a typical example with relatively irregular boundary conditions, with variable thickness at random points and under discontinuous loading condition, a truncated hemispherical shell with opening at the top under circular curve load was adopted in this paper. The strength for shells was evaluated with the nonlinear numerical analyses based on the failure experiments. The experimental study was conducted on small-scaled shell specimens made of carbon fiber chip reinforced concrete with mixed-in carbon fiber chips and without steel bar reinforcing. The theoretical study was conducted using the material and geometrical nonlinear finite element analyses. The ultimate strength of shells accompanied with variable thickness at random points under circular curve load was discussed based on the results of the failure experiments and nonlinear numerical analysis.
東海大学の論文