Research on the seismic performance of bare steel column base

In order to research the seismic performance of bare steel column base and to improve the reliability of its designation,this thesis by experimental research contrasts the whole response and the local response of two different base samples under cyclic loading reversals and it also analyses the column base's failure characteristic,the hysteretic behavior,skeleton curve,ductility and capability of energy dissipation.The result shows that the initial stiffness of two specimen are similar,but the stiffness of column base with flange-supporting board is weakening slower than the speed of column without flange-supporting board;the former column's ductility is higher by 28.7% than the latter,and its capability of energy dissipation is higher than the latter by 10.1%.It concludes that the flange-supporting board can improve the column's connection and loading capability to strengthen the cooperative function of the node components and the mechanical characteristics of column shows that its destructive form is semi-rigid and can appear plastic hinges.