| Concrete filled steel tubular column frame shear wall structure systems is a new type of hybrid structure system,which is applied to the high-rise steel structure.In this paper,the seismic performance analysis of concrete filled steel tubular column frame shear wall structure systems was conducted,with different element number and local unit height of different column frame.The model of concrete shear wall structure system was established by using SAP2000 finite element software,the structure frame with 3 sets of concrete filled steel tubular columns with different number of units and local unit height.The results of first mode analysis showed that with the increase in the number of X units to the lateral stiffness significantly increased lateral stiffness to Y slightly reduced,the structure of the cycle ratio increases,torsion resistance weakened,reduce the local height of the unit after the period of the structure decreases and the stiffness increases.Then the response spectrum analysis and dynamic time history analysis modal decomposition,analysis results show that the increase in the number of units,greatly reduces the X structure layer to the drift,improve the structure of X to the lateral stiffness and seismic performance,Y to the layer displacement angle slightly increases,seismic to weaken the performance of Y.When the height of a unit is reduced,the maximum inter story displacement angle of the structure is reduced,but the displacement angle between the structure X and the layer is greatly increased at the height of the unit.The model of concrete filled steel tube concrete composite column frame concrete shear wall structure with two units height is 81 meters.The analysis showed that with plastic deformation and good seismic performance for CFST column frame-concrete shear wall structure,structure design and meet the target performance specification based on the requirements of a large safety reserve. |
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