Prediction of Flexural Behavior of Fiber-Reinforced High-Performance Concrete

Abstract

The availability of ultra-fine materials, mineral, and chemical admixtures have made an easy design of concrete mix of high and ultra-high strength. Many investigators have developed methods to predict the flexural strength of fiber-reinforced concrete composites assuming different stress distribution over the crosssection. However, it has been observed that the use of fibers throughout the crosssection is structurally inadvisable and economically wasteful, as the tensile stresses are developed in one portion of the crosssection, depending on loading and end conditions. The beams having fiber reinforcement in only tension region are found to possess higher flexural load capacity and higher initial stiffness in comparison to the corresponding beams with fibers throughout the section. Based on this approach of tension reinforcement, the concept of partial depth fiber-reinforced high-performance concrete beams has been established by incorporating fibers in tension zone only. The typical results obtained experimentally are analyzed in the light of load–deflection behavior, failure pattern, cracking and ultimate moment capacity, and ductility associated parameters have demonstrated that Fiber-Reinforced High-Performance Concrete (FRHPC) is extensively used as a construction material because of fact that the composite provides better mechanical, rheological, and durability properties.