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Title |
A Study on the Strength Evaluation of Rectangular Steel Tubular Columns Infilled with High Strength Concrete
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Keywords |
고강도 콘크리트 ; 각형CFT기둥의 내력 ; 두께가 얇은 각형강관 High strength concrete ; Strength of rectangular CFT stub columns ; Thin-walled rectangular steel tube |
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Abstract |
The CFT columns used in thin-walled steel tubes can be more economical, because it was expected the increase of strength by restriction for the local buckling of steel tubes. The purpose of this paper is to review feasibility of existing design formula and verify the applicability limit of width-to-thickness ratio for increasing the strength of rectangular CFT columns. As the main parameters of experiments, width-to-thickness ratios of steel tube, height of rectangular concrete columns, and concrete filled or not. The strength of concrete are selected to 90MPa. From the test results, the confinement effect of steel tube on the compressive strength of infilled concrete is remarkably appeared in the thin-walled rectangular steel tube columns infilled wih high strength concrete. By the non-linear analysis, the axial strength from experiment result was given higher than analysis result for all CFT stub columns.
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