Hysteretic Behavior Analysis Of CFRP Steel Composite Pipe Concrete Composite Column

The structure of composite pipe concrete column of CFRP steel is mainly composed of CFRP and steel pipe to restrict the concrete in the core area.This can not only improve the bearing capacity of the composite components,but also improve the seismic performance of the composite components.The CFRP paste on the steel pipe can also prevent the corrosion of the components.Obviously,This combination has a good application prospect in China's earthquake prone areas and harsh environment.In order to make this composite component better applied to the earthquake prone area,we need to do some research work on the composite component.In this paper,the hysteretic behavior of CFRP steel composite pipe concrete composite column is studied.The research work is to establish and analyze the model through the finite element software ABAQUS,and apply low cycle cyclic loading on the component,by controlling the steel ratio,axial pressure ratio,the number of CFRP bonding layers and the ratio of diameter to thickness.The hysteretic curves and skeleton curves of the composite members are analyzed and calculated.The ultimate bearing capacity of each composite column is calculated by the skeleton curve.At the same time,the calculated hysteretic curve is calculated by Origin software,and the energy dissipation capacity and equivalent viscous damping of the composite component are obtained.The stiffness degradation of the composite component is obtained through the peak load and the corresponding displacement of the hysteresis curve.The seismic performance of the component is evaluated.