Experimental Study By The Digital Image Correlation Method On The Bond-slip Characteristics Of FRP Embedded Interface

The Digital Image Correlation Method (DICM) is a new non-contact opticalmeasurement method. Due to its advantages of non-contact feature, high precision andsimplicity of the device, it makes up for the deficiencies of the commun measurementmethods in the civil engineering, and is therefore gradually applied to the tests of somecritical and complex issues.Combined with the characteristics of the digital image correlation method, this paperattempts to apply the technology of CFRP embedded reinforcement interface problem in thestudy, through experiments on the interface bonding CFRP plank embedded concreteperformance has carried on the experimental study and theoretical analysis.By using digital image correlation method and direct simple shear type drawingcombining the experiment method, the direct measurement of the18after CFRP embeddedreinforcement of concrete specimens in the process of the axial drawing chants anddisplacement distribution of the interface, the application of Vic-2d software (based ondigital image correlation method of the calculation and analysis software) to calculate out therelative displacement and the relative strain, deformation and failure regularity of interfacewas studied. Slot width and the bond length is studied on the bonding capacity, failure formsand the influence of the bonding performance characteristics, such as the bond-sliprelationship. Finally, through theoretical analysis and research the embedded interfacebond-slip relationship problems, test results show that the existing double linear model are ingood agreement with experimental data.