The Stiffness Calculation Of SRC-RC Transferring Column

SRC-RC vertical composite structure employs sufficiently advantage of RC structure and SRC structure, having competitive effects. It can apply to the high-rise and super high-rise building widely and can realize identity of seismic performance and economic performance.In this paper, the damage style of six SRC-RC transferring column specimen which applied low-frequency cycle reversed cyclic loading lies in different ductile length of SRC, different axial compression ratio and ratio of steel by experiment research are analyzed. The elastic stiffness and stiffness degradation rule of SRC-RC transferring column are study by comparing the experimental parameters of the different specimens. According to the skeleton curve of the specimen and hysteretic curve a tri skeleton curve model is suggested to SRC-RC transferring columns.Finally, by experimental study and theoretical analysis based on the section flexural stiffness of RC columns and SRC columns, according to the principle of top displacement equivalent, derived the conversion formula of flexural stiffness of SRC-RC columns, and thereby the formula for calculating the anti-lateral elastic stiffness of SRC-RC columns is achieved. The elastic stiffness calculated values of each specimen with this formula are in good agreement with the experimental values.