Strength of Reinforced Concrete Circular Cylindrical Shells with Openings under the Partial Load

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The main purpose of this paper is to investigate both experimentally and theoretically, the strength of reinforced concrete roof-type circular cylindrical shells with openings within the shell surface. The line load was applied on the shell surface and the shell was corner-supported by pins. The openings within a concrete shell surface make it possible to brighten the interior space of the shell. Therefore this techniques have been adopted in the shell design for many architectures to make much favorable space since early times of concrete domes such as the Pantheon Dome in Rome. The stress disturbances on shells, however, could be indispensable and so the strength of such a shell remains to be unresolved problems. Moreover the partial load on shell surface could make another stress disturbance in shell behaviors. In this study the shell strength influenced by the point load and the line load as representative types of the partial load was investigated. The parameters of the line load are line load length and load density pattern. The line load is parallel to the circular curve of the shell directrix. The experimental study was conducted on reinforced micro-concrete 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 cracking patterns of shells with openings under variable line load are discussed based on the results of the experiments and analyses.
東海大学の論文

Strength of Reinforced Concrete Circular Cylindrical Shells with Openings under the Partial Load

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