SEISMIC PERFORMANCE OF PRECAST PC BEAMS USING SFRC

摘要

Steel-Fiber Reinforced Concrete (hereafter referred to SFRC) is increasingly being used day by day as a structural material, for example, as coupling beam in coupled shear wall structures. Steel-fiber reinforced concrete is expected to enhance the tensile properties of the resulting composite such as strength and stiffness. Many researchers have proposed evaluation methods of the flexural strength and material model for steel-fiber reinforced concrete members in the past. In addition, only a few researches have been conducted to examine the role of fibers in the area of prestressed concrete applications. In this study, an attempt has been made to experimentally evaluate the seismic behavior of prestressed concrete beams using steel-fiber reinforced concrete. This study presents results from an experiment for two prestressed concrete beams and four prestressed concrete beams using steel-fiber reinforced concrete, where the main parameters were the volumetric ratios of steel-fibers: 0.0, 0.5 and 1.0 percent and the number of PC strands: 3 and 6. This research mainly attempted to evaluate the energy dissipation capacity and shear reinforcing effect of pre-tensioned beams using steel-fiber reinforced concrete. By using SFRC in PC beams, flexural strength was improved and the number of shear cracks was less than in beams without SFRC.