Study on Strength Evaluation of Fiber Reinforced Concrete Shells

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The main purpose of this paper is to develop a evaluation method for ultimate strength of concrete shell structures by using reduction parameters based on the linear critical load. The strength of a concrete shell can usually by much higher than that of the other shell structures, such as lattice shell and tension shell, and therefore, a concrete shell is designed to be spatial structures with high load bearing capacity. The strength of a concrete shell, however, is not easy to estimate and for that purpose it is inevitable to prepare accurate failure experiments or complicated nonlinear numerical analyses, which are not only expensive but laborious. Moreover it is very difficult to evaluate the precision of the results. This study shows the analytical strength evaluation process of concrete shells by considering the Dulacska's Revised Version of IASS for reduction parameters based on linear buckling analysis, and the results are compared with the failure experiment. The experimental study was conducted on small scaled carbon fiber reinforced microconcrete shell specimens. The concrete shell specimens are made with carbon fiber reinforced concrete by mixed-in carbon fiber chips and without steel bar reinforcement, which are much compatible for the free form shell structures, because of the higher quality in both homogeneity and isotropy than normal reinforced concrete. Actual shell thickness, initial imperfections, plastic yielding stress intensities and linear critical load are considered in the estimation of the ultimate strength of the shell.
東海大学の論文

Study on Strength Evaluation of Fiber Reinforced Concrete Shells

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