Abstract
We confirmed the mechanical behavior of unembedded type column bases subjected to variable axial and cyclic flexural load through the structural tests of two series. The structural tests of two series are composed of the experiment on the specimen of a real large size and the half reduction size. From the test result, it was shown that limit rotation angle of column bases subjected to variable axial loading decreases. The reason for this cause is that local bucking and fracturing of main reinforcement occurs at column bases subjected to cyclic flexural load under the variable axial load compared with column bases under the constant axial load. In addition, we carried out the elasto-plastic analysis, and verified the accuracy of the analysis.
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