Abstract
This study presents the construction of a new simple analytical model for the bond-slip relation at the intersection nodes of CFRP (Carbon Fiber-renforced Plastic) grids, with consideration of parameters obtained from experimental data. Presented analytical model employs bond linkage elements for FEM analysis which consists of bi-linear springs to express the bond-slip behaviors on lines and intersention nodes of CFRP grids. It is the feature of this model to treat bond-slip of the intersection nodes separately from bond-slip of the lines. The validity of this model is verified by comparison with pull-out test results of CFRP grids embedded in concrete. Furthermore, a normalized bond-slip relation at the intersection nodes of CFRP grids is also presented to neglect the effects of diameters of CFRP grids line and concrete strength. In addition, the development length at the end of CFRP grids line is estimated based on the normalized bond slip relation at the intersection nodes of CFRP grids.
