Fiber Pullout and Bond Slip. II: Experimental Validation

This is the second of a two‐part paper involving a fundamental study of the bond‐stress‐slip relationship between steel fibers and cement‐based matrices. It presents a validation of the analytical model developed in the first part by providing comparisons between experimentally and analytically predicted pullout load curves of steel fibers embedded in cementitious matrices. Very good agreement is observed. The model is also used to derive, for the first time, bond shear stress versus slip curves typical of fiber‐reinforced concrete and considered a constitutive property of the fiber‐concrete interface. This has good practical significance since, while pullout tests of fibers are easy to conduct, there is currently no experimental method that directly yields their bond shear stress versus slip relationship.