炭素繊維補強によるコンクリート造シェルの耐力評価

概要

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The main purpose of this study is to evaluate the strength of concrete shells with carbon fiber reinforcement on the basis of linear buckling analysis. The ultimate strength of concrete shells could not be easily evaluated because of the requirement of expensive experiments or complicated numerical analysis. However, on the basis of linear buckling analysis, as proposed by the revised version of the IASS Recommendations, strength evaluation could be easily predicted although with a rough precision. Therefore, in this study, ultimate strength evaluation by stability analysis is carried out with consideration of an effective initial imperfection corresponding to an actual shell thickness fluctuation. For this purpose, hemispherical shells fabricated from concrete reinforced with carbon fiber chips and cylindrical shells fabricated from concrete reinforced with carbon fiber composites were investigated. These shells were supported without any additional stiffening members in order to clearly analyze the boundary conditions. The results of ultimate strength evaluation are discussed on the basis of a fracture strength experiment.
2006-03-31