The effect of cross-sectional dimensions of CFRP strip on the bond behavior of the horizontal-embedded CFRP-concrete interface
The near end enhanced embedment(NEEE)prestressed CFRP strip reinforcement technology is a new and efficient way to strengthen concrete structures.The interfacial bond behavior between the horizontal-embedded CFRP and the concrete is the basis for reliable anchoring CFRP and ensuring the mechanical performance of the strengthened structure.This paper therefore investigated the range of strip widths and strip thicknesses for which the horizontal-embedded technique was applicable to provide a basis for the design of NEEE CFRP strip reinforcement concrete structures.Firstly,the correlation between the cross-sectional dimensions of the CFRP strip and the local interfacial bond-slip characteristic parameters was investigated through single shear pull-out test,and the optimum CFRP strip width and thickness were defined.Furthermore,through inductive statistics,the functional relationship between the optimum width,thickness of CFRP strip andthe peak interfacial bond shear stress,the peak relative slip value under the horizontal-embedded condition were established respectively.Finally,the bond-slip constitutive model of the interface between horizontal-embedded CFRP strip and concrete was obtained,which varied with the width and thickness of CFRP strip.Meanwhile,further validation and analysis of the bond-slip constitutive model were conducted using ABAQUS finite element software to prove that the model has a certain degree of accuracy.
NEEEhorizontal-embeddedcross-sectional dimensions of the CFRP stripbond behaviorbond-slip constitutivefinite element simulation
万方数据
维普
