Design Method of Shear Resistance of Hybrid Fiber Reinforced High Performance Concrete Deep Beams

Abstract:

In order to study the shear resistance and design method of hybrid fiber (steel fiber and polypropylene fiber) reinforced high performance concrete deep beams, the shear tests were conducted according to the orthogonal experimental design. The contributory factors such as the characteristic parameters of steel fiber (types, volume fraction, aspect ratio), the volume fraction of polypropylene fiber, the ratio of web horizontal reinforcement and the ratio of web vertical reinforcement were analyzed. Results illuminate that shear failure mode of hybrid fiber reinforced HPC deep beams are splitting failure and diagonal compression failure. Hybrid fiber can notably increase the diagonal cracking strength and shear strength of HPC deep beams. The diagonal cracking strength is increased by 5.6%~83.8% while the shear strength is increased by15.6%~35.2%. A formula to calculate the shear resistance of hybrid fiber reinforced HPC deep beams is put forward based on spatial strut-and-tie mode and splitting failure. Meantime test verification is carried out and the calculated results are satisfied.

• Periodical: Applied Mechanics and Materials (Volumes 477-478)
• Pages: 686-689
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.477-478.686
• Online since: December 2013
• Authors: Sheng Bing Liu*, Li Hua Xu, Hai Lin Lu, Hao Tan
• Keywords: Deep Beam, Design Method, High-Performance Concrete (HPC), Hybrid Fiber, Shear Resistance

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