Strength of Carbon Fiber Chip Reinforced Concrete Circular Cylindrical Shells with Edge Members under Impact Point Load

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The paper treats the strength of carbon fiber chip reinforced concrete (CFCRC) roof-type circular cylindrical shells under impact point load, the shell boundaries of which are stiffened with edge members, such as edge arches and edge beams. The failure patterns and nonlinear behaviors were investigated theoretically and experimentally. The effects of shell openings on the shell strength were also investigated. The CFCRC shells, which could show higher adaptability for any curved or irregularly shaped shell surfaces and boundaries compared to the steel bar reinforced concrete shells, were made by concrete reinforced with mixed-in carbon fiber chips and without steel reinforcing bars. The CFCRC shell strength was investigated by comparing with the standard steel reinforced concrete shell strength. The parameters of this analysis are depth of edge members and concrete tensite strength, which could be expected to be valuable parameters in shell design and constructions. The experimental failure study was conducted on small-scaled CFCRC shell specimens. Impact point load was applied perpendicularly onto the shell surface to the final failure states. The theoretical study was conducted using nonlinear transient dynamic finite element analyses with concrete cracking and tension stiffening effects. The CFCRC shell strength and the cracking patterns under impact point load are discussed based on the results of the failure experiments and nonlinear analyses.
東海大学の論文

Strength of Carbon Fiber Chip Reinforced Concrete Circular Cylindrical Shells with Edge Members under Impact Point Load

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