For steel and concrete materials, according to the actual strength obtained by the test, the corresponding material strength design index shall be determined according to the current relevant national standards; the corresponding stress of the carbon fiber sheet shall be determined according to the linear elastic stress-strain relationship according to the strain when the component reaches the limit state ; Carbon fiber sheet should take the ultimate tensile strength of not less than 95% guarantee rate provided by the manufacturer as the standard value of tensile strength; when using bonded carbon fiber sheet to reinforce the structure or components, consideration should be given to other aspects of the structure after reinforcement The possible influence of the component or other properties of the component.
When using bonded carbon fiber sheets for structural reinforcement, it is advisable to remove the live load acting on the structure. If the reinforcement cannot be carried out under complete unloading conditions, the influence of the secondary force should be considered; during bending reinforcement and shear reinforcement, the actual concrete strength level of the reinforced concrete structure and components should not be lower than Cl5. Adopt closed and pasted carbon fiber When the sheet material is used to reinforce the concrete column, the concrete strength grade should not be lower than C10.
