Strength of Carbon Fiber Chip Reinforced Concrete Circular Cylindrical Shells with Openings under Partial Load

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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 (CFCRC) roof-type circular cylindrical shells with openings within the shell surface under partially applied load. The shell was corner-supported by pins. 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. Fiber reinforced concrete was made of concrete reinforced with mixed-in carbon fiber chips and without steel reinforcing. The material is able to be fit to any curved shell surfaces and shows higher isotropy compared to standard reinforced concrete with steel reinforcing bars. The openings within a shell surface and the partial load, such as point or line load on a shell surface, induce stress disturbances into shell structures and its strength and nonlinear behavior has not yet been fully understood. In this study the shell was subjected to either point load or line load parallel to the circular curve of the shell directrix. The variable parameters of the line load are line load length and load density patterns. The experimental study was conducted on CFCRC shell specimens. Line load was applied perpendicularly on the shell surface until the final failure occurred. The theoretical study was conducted using the material and geometrical nonlinear finite element analyses including concrete cracking and tension stiffening effects. The ultimate strength and the nonlinear behavior of shells with openings under several kinds of variable line load are discussed based on the results of the experiments and analyses.
東海大学の論文

Strength of Carbon Fiber Chip Reinforced Concrete Circular Cylindrical Shells with Openings under Partial Load

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