Analysis Of Hysteretic Behavior Of FRP Pipe Concrete Steel Tube Composite Column Under Low Cyclic Reversed Loading

FRP tube-concrete-steel double-skin tubular column referred to as DSTC,the design concept of this component is mainly to restrict the concrete between the two layers through the outer FRP tube and inner steel tube,the overall bearing capacity of the component is well improved.At the same time,the built-in hollow structure features not only the convenience of piping layout,but also the seismic performance of the structure.Obviously,this kind of composite component has a very good application prospect in our country's earthquake prone geographical environment.Therefore,in order to apply this composite component to the seismic structure of the project,we need to do a lot of research work,which includes a large number of experimental studies and sufficient theoretical analysis.In this paper,the seismic performance of FRP tube-concrete-steel double-skin tubular column is studied theoretically.The research work is carried out through the finite element simulation software.In this paper,I will use the ANSYS finite element software to simulate and analyze the hysteretic behavior of FRP concrete filled steel tubular columns under cyclic reversed loading.Taking the hollow ratio of the component,the steel ratio and the axial compression ratio as the simulation factors,according to the simulation results of the finite element software,we can obtain the hysteretic curves of the composite members under cyclic reversed loading.First of all,to the data curve through record peak point coordinate lag,every load and connect it,then get the skeleton curve of component,the skeleton curve can reflect the specimens under low cyclic loading stiffness,strength,ductility and bearing capacity variation.Then,the hysteretic curve area calculated by Origin software is used to calculate the energy dissipation capacity of the component under low cyclic reversed loading.