ABSTRACT
This research establishes some theoretical formulations to describe the creep behavior of steel fiber reinforced concrete (SFRC), under various influencing factors including exposure environments, fiber contents, and applied stress states. The bond stress along the interface of fibers and matrices was found as the main reason why the fibers can resist the creep deformation of concretes. This fiber–matrix interfacial bond was evaluated theoretically and the formulations to calculate the creep strain of SFRC were derived. Creep strains of the steel fiber reinforced concrete can be obtained from these theoretical formulations based on the creep and shrinkage test data of the corresponding unreinforced plain concrete. Some comparisons between experiments and theoretical results of proposed model were performed to validate the theory. The results of the proposed model can fairly show that the restraint capability of fibers on creep of concretes is much more distinct under drying environment, tensile stress state and higher content of fibers.
