This paper describes experimental results of shear capacity of concrete beams reinforced by PVA short fiber. Loading test was carried out on reinforced concrete beams with PVA short fiber by changing fiber type, fiber content, shear reinforcement ratio, effective depth, and shear span-to-effective depth ratio. As a result, it was confirmed that shear capacity is improved by mixing PVA short fiber and that the increase in shear capacity is influenced by fiber content and specimen size.
The fiber was confirmed to effectively act in tied-arch beams. Therefore, an equation to estimate shear capacity for reinforced concrete beams with small shear span-to-effective depth ratio was modified by using the breaking point stress of tension softening curve and the effective depth of beam to express the capacity of the beams reinforced by PVA short fiber.