Abstract
This paper describes the experiment and the seismic response analysis about steel frame with exposed type column bases under variable axial force.The experiment of the steel frame of three different column bases was carried out to discuss influence of hysteretic characteristic of column bases on elasto-plastic behavior of steel frame.The result of the seismic response analysis of steel frames of a different column base model showed that the structure characteristic of column base under variable axial force have few influence on the maximum story drift of frame and the cumulative plastic rotation of beams.
