Concrete filled steel square and circular tubular columns were tested under concentric and eccentric axial force. As the experimental parameters, the buckling length-section depth ratio Lk/D and magnitude of eccentricity e are selected. Strength and behavior are examined and elasto-plastic analyses are performed to predict the maximum strength and the load-deflection relations. AIJ design method for slender composite columns subjected to axial force and bending moment are examined. The conclusions are as follows: 1)AIJ design method for slender concrete filled steel tubular columns is so conservative. 2)Experimental maximum loads of columns are well predicted by the presented analysis.
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Matsui et al. (1997) studied this question.
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