Mechanical Behavior And Bearing Capacity Analysis Of L-Shape CFT Compression Columns With Binding Bars

Concrete filled L-Shape steel pipe formation composite structure ofL-shape CFT columns, which has the advantages of being simple information, easy to accord with requirements of building plan, the relativedevelopment and high inertia moment of section, relative to circular concrete-filled steel tube. Therefore, in engineering has great application prospect of L-shape CFT columns. However, due to the tube wall on each side of thecentral core concrete confinement effect is small, the long side to the coreconcrete confinement effect is weaker than the short edge features. Therefore,set horizontal tie in the middle part of the long side to constraint steel platetransverse deformation, help to improve confinement effect of the coreconcrete and improve mechanical behavior of members. Based on the aboveanalysis, in this paper with mechanical behavior analysis and research onbearing capacity of L-Shape CFT compression columns with binding bars.The main contents include:1. Based on numerical simulation analysis of L-shape CFT axialcompression columns with binding bars is studied in the present paper, setup a three-dimensional finite element model and analysis program ANSYS.the results show that the simulation model is reasonable. On this basis， inthis paper analyzes of longitudinal space and horizontal interval of bindingbars, thickness of steel pipe and slenderness ratio effects， with mechanicalbehavior and bearing capacity of L-Shape CFT axial compression columnswith binding bars.2. Based on numerical simulation analysis of L-shape CFT uniaxial lowbias voltage columns with binding bars is studied in the present paper, setup a three-dimensional finite element model and analysis program ANSYS.the mechanical properties under different eccentricity analysis. Analysis sixparameters of slenderness ratio, concrete strength grade, thickness of steelpipe, the yield strength of steel, eccentricity and horizontal interval ofbinding bars effects on bearing capacity by using orthogonal analysis.3. Derivation of bearing capacity formula of L-Shape CFT axialcompression columns with binding bars. Separately use unified theory, limitequilibrium theory, unified strength theory, and consider effect of the binding bars to concrete confinement and the section properties. The resultswhich were compared with finite element results, obtains the reasonablecalculation method.4. In the basis of bearing capacity formula, using empirical coefficientmethod and the regressive analysis of finite element results Derivationof bearing capacity formula of L-Shape CFT eccentricity compressioncolumns with binding bars. The results were compared with finite elementresults...