The Finite Element Analysis Of Short Columns Reinforced By CFRP Under The Action Of Pressure, Bending, Shear And Torsion

Building structure which is used after of a certain number of years or in the course of changing the features make the structural reliability be gradually decreased. In these cases, the original structure or components need to be reinforced to ensure continued using reliability. Because of its excellent performance, CFRP (carbon fiber reinforced material) has been widely used. Currently, the torsion performance on the reinforced concrete columns is studied few. Especially concrete columns reinforced under the combined action is studied less.Based on the analysis of existing summarized information. Using finite element analysis software ANSYS, we analysis concrete reinforced by CFRP under the combined action and build nonlinear finite element model. Made the number of layer pasting CFRP, the location and orientation to be the test parameters to observe the specimen failure modes, and determination of specimens by the torsion capacity and reverse angle and steel, concrete and carbon fiber strain, and analysis of carbon fiber reinforced concrete column failure mechanism of torsion. Though analyzing the phenomenon of the destruction of components and factors that affect the torsion capacity we can find changes variation.On this basis, calculated with a variable angle space truss theory and after analysising the structure,we will find the relationship between torque strength, the axial force, bending moment and shear force.Finally, we will give a more realistic formula for the force of practical application after analysising the theory of computation of practical engineering application.