Shear Capacity of Biaxial Hollow Slab with Donut Type Hollow Sphere

This paper presents the shear capacities of biaxial hollow slab with donut type hollow sphere. Recently, various types of slab systems which can reduce self-weight of slabs have been studied as the height and width of building structures rapidly increase. A biaxial hollow slab system is widely known as one of the effective slab system which can reduce self-weight of slab. According to previous studies, the hollow slab had low shear strength, compared with solid slab and the shear capacities of biaxial hollow slab are influenced by the shapes and materials of hollow spheres. In addition, the present code does not provide a clear computation method for the shear strength of hollow slab. To verify the shear capacities of this hollow slab, shear tests were performed. Four test specimens were used for test parameters. One was conventional RC slab and others were hollow slabs. The test parameters included two different shapes and materials of plastic balls. The shape parameters were donut and non-donut forms. And the material parameters were general plastic and glass fiber plasti