Numerical Study On Mechanical Behavior Of Reinforced Concrete Special-shaped Columns Strengthened With CFRP Sheets

The special-shaped column refers to the cross section column L shape,T shape and crisscross shape form,the form of column can effectively avoid indoor appear sharp corners and reduce the weight of structure,and the internal layout of the building is more beautiful.Although there are many advantages of special-shaped columns,the research on the mechanical properties of reinforced concrete special-shaped columns is not enough.In recent years,due to the wide application of reinforced concrete special-shaped column structure system,the research and study of reinforced concrete special-shaped column structure system has become an important research topic.In the course of using the concrete column,it may be faced with the low strength of concrete pouring after construction,and the design load does not accord with the applied load.For the reinforced concrete special-shaped columns,it is necessary to adopt the reasonable reinforcement method,and the carbon fiber cloth is a relatively mature reinforcement material,which is of great significance to the strengthening of special-shaped columns.In this paper,based on the ABAQUS finite element model,the mechanical properties of reinforced concrete special-shaped columns strengthened with CFRP sheets are studied.The main research work of this paper includes:1.The theoretical formulas of reinforced concrete L-Section Columns Strengthened with CFRP sheets are complemented and enriched.2.The reasonable finite element model of reinforced concrete special-shaped columns strengthened with CFRP sheets is established,and the correctness of the model is verified according to the existing references.3.Expand the research parameters,based on the results of ABAQUS analysis,to determine the influences of five factors,such as eccentricity,CFRP sheet layers,limb length ratio,concrete strength grade and limb length to thickness ratio,on reinforced concrete special-shaped columns strengthened with CFRP sheets were studied.4.According to the results of finite element analysis,it provides a scientific basis for the practical application of the project and the follow-up research.