50MPa이상의 고강도 콘크리트 충전강관 단주의 축방향 실험

초록

Experimental results of circular tubular stub columns filled with high strength concrete above 50MPa under concentric loading are presented in this paper. Main parameters are as follows; (1) diameter‐to‐thickness ratio of steel tubes (2) concrete compressive strength. Average strength ratio between test results and calculated ones obtained by several regulations(KBC2009, AISC 360-10, CISC) was ranged from 1.10 to 1.24. Also, related curves between axial load and strain of test results were compared with those described by there proposed models of other researchers. Maximum loads calculated by three models agreed well with test strengths of CFT stub columns. However, those models were not proper to present the steep strength deterioration after reaching the maximum load shown in case of CF10 specimen. Also, it was known that those overestimated axial stiffness of experimental results.

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