Research On The Ultimate Bearing Capacity Of Structure Strengthened With Composites

Based on the application of carbon fiber in concrete structure and steel structure, concrete column whose reinforcements are replaced by C-BAR and which under high temperature, dynamic load respectively before and after wrapping carbon fiber is analyzed by finite element method, non-linearity buckling capacity of steel member that under the axial compressive load and bending moment before and after being wrapped carbon fiber is plastically analyzed by finite element method.Bearing capacity of concrete column whose reinforcements are replaced by C-BAR is analyzed. The effects of the longitudinal reinforcements, hoops respectively and all being replaced by C-BAR on the bearing capacity of concrete column are studied. It is confirmed the replacement mentioned above can reduce the quantity of concrete in concrete column by an example, and which can lighten the deadweight of concrete structure.Bearing capacity of concrete column strengthened with carbon fibre under high temperature is analyzed. The effects of thickness, elastic module of carbon fibre on the bearing capacity of concrete column are studied, the strengthened effects of carbon fiber on different cross sections of concrete columns are compared, the effect of longitudinal carbon fiber on the bearing capacity of concrete column under bending moment is studied.Bearing capacity of concrete column strengthened with carbon fibre under impact, cyclical load respectively is analyzed. Effects of thickness, elastic module of carbon fiber on the bearing capacity of concrete column are studied. According to the existing example, the FEM solution and analytical solution of the bearing capacity of the concrete column under cyclical load are compared.Non-linearity buckling capacity of rectangle section steel member strengthened with carbon fiber under the axial compressive load and bending moment is analyzed. Analytical solution of elastic-plastic buckling of rectangular section column wrapped by composites under the axial compressive load and bending moment is derived, and which is testified correct and accurate by being compared with the FEM solution.