Analyzing the Bond Behavior of Fiber-Reinforced Polymer (FRP)‎ Bars Embedded in Engineered Cementitious Composites (ECCs)‎ with the Nonlocal Continuum Rod Model

Abstract EN

In this study, a nonlocal elastic rod model is applied to analytically evaluate the bond behavior between fiber-reinforced polymer (FRP) bars and engineered cementitious composites (ECCs).

The second-order differential equation, which is based on nonlocal elasticity theory, governs the bond behavior of the FRP bars along the bond length.

The classical elasticity model is a special case of the nonlocal model.

The solution of the second-order differential equation can be obtained by substituting three-stage linear bond stress-slip relationship of the FRP bars.

The slip values (solution of the second-order differential equation) within the bond length calculated by the nonlocal continuum rod model are affected by the nonlocal parameter e0a.

The results from a case study show that the maximum pullout force decreases when the nonlocal size effect is considered, thereby providing a closer approximation of the experimental data than the existing local model.