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Title |
One-Way Shear Strength of Donut Type Biaxial Hollow Slab Considered Hollow Shapes and Materials
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Keywords |
이방향 중공 슬래브 ; 중공 형성체 ; 전단강도 ; 실험적 연구 ; 무량판 슬래브 biaxial hollow slab ; hollow sphere ; shear strength ; experimental study ; flat plate slab |
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Abstract |
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 for increasing constructions of taller and larger building structures. 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 has low shear strength, compared to solid slab. Also, the shear capacities of biaxial hollow slab are influenced by the shapes and materials of hollow spheres. However, the current code does not provide a clear computation method for the shear strength of hollow slab. To verify the shear capacities of this hollow slab, one-way 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 nondonut forms and the material parameters were general plastic and glass fiber plastic. The results showed that the shear strengths varied depending on hollow shapes and materials used in the slab.
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