Abstract
Author had presented the numerical model for exposed-type column base , which can treat the behavior of semi-rigid connection under variable axial force. In this paper, the applicability and availability of the numerical model is confirmed through the cyclic loading tests on the cantilever with the exposed-type column base. Also, the influence of variable axial force on the rotary stiffness and moment carrying capacity of the column base are investigated. Through these studies, it is clarified that 1) the rotary stiffness and the bending moment carrying capacity of the column base varies in accordance with the variation of axial force, 2) the concentration of plastic deformation in anchor bolts and the deterioration of bending moment carrying capacity in column base are observed when tensile axial force increment acts on the column base, 3) the numerical model could reproduce the deformation mechanism due to rotation of the base plate, the variation of rotary stiffness and the maximum rotary angle response of the column base under variable axial force, satisfactorily.
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