Finite Element Simulation Analyses Orthogonal Experiments Of CFRP Strengthened Square Steel Tubular Column Under Load

While the number of buildings and structures in the form of steel structure has greatly increased,it has also brought many safety problems,causing huge losses to life and property.In order to solve these structural safety problems,it is necessary to take reinforcement and repair measures.Although there are many kinds of reinforcement methods,each has its own shortcomings.When CFRP materials is used to reinforce and repair structural damage,Compared with the traditional way,it has outstanding non-destructive strengthening performance,so it has gradually become a new strengthening technology with outstanding performance and strong practicability.Therefore,in order to speed up the popularization of CFRP materials,it is necessary to conduct in-depth study.On the basis of the previous research,this paper combines the research results of our research group to study the square steel tubular column strengthened by CFRP cloth from the following aspects:The redesign and combination of the non-load bearing and load bearing compression tests are carried out by quoting the previous tests of our research group.In order to verify the validity of the model,the ABAQUS simulating test process is used.On the basis of the non-load bearing compression tests,we should make a further study by ABAQUS into the influence of CFRP's spacing and proportion,which will affect the stability and ductility of the columns.Based on the orthogonal design method,the three parameters of slenderness ratio,eccentricity and initial load are designed and analyzed according to the appropriate orthogonal table.The data results are analyzed by range analysis and variance analysis in turn.Finally,the influence order of the three factors on the stable bearing capacity of the square steel tubular column is obtained.