Tensile behavior of strain-hardening cementitious composites after self-healing based on a novel fiber-bridging model considering preloading and reloading

The self-healing of strain-hardening cementitious composites (SHCCs) causes the recovery debonded fiber-to-matrix interface by products autogenous healing (mainly calcium carbonates). chemical bond G d has been detected in reactive magnesia cement (RMC)-based SHCC (SHMC), and frictional τ 0 both SHMCs normal SHCCs. While these phenomena can significantly alter fiber-bridging σ-w relationship SHCCs, they have not quantified any existing analytical models. In this work, we present a new model that captures effect RMC-based SHCC. On single-fiber level, debonding slip-hardening induced tensile preloading as well properties are coherently clear kinetic process. stress vs. crack width curve is formed summing individual fibers’ load displacement relationship. modeling results capture behavior self-healed specimens. Further, parametric study conducted to investigate after self-healing. effects levels, recovered , fiber strength discussed.