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http://dx.doi.org/10.1007/s40069-016-0145-8

Shear Tests for Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) Beams with Shear Reinforcement  

Lim, Woo-Young (Institute of Engineering Research, Seoul National University)
Hong, Sung-Gul (Department of Architecture and Architectural Engineering, Seoul National University)
Publication Information
International Journal of Concrete Structures and Materials / v.10, no.2, 2016 , pp. 177-188 More about this Journal
Abstract
One of the primary concerns about the design aspects is that how to deal with the shear reinforcement in the ultra-high performance fiber reinforced concrete (UHPFRC) beam. This study aims to investigate the shear behavior of UHPFRC rectangular cross sectional beams with fiber volume fraction of 1.5 % considering a spacing of shear reinforcement. Shear tests for simply supported UHPFRC beams were performed. Test results showed that the steel fibers substantially improved of the shear resistance of the UHPFRC beams. Also, shear reinforcement had a synergetic effect on enhancement of ductility. Even though the spacing of shear reinforcement exceeds the spacing limit recommended by current design codes (ACI 318-14), shear strength of UHPFRC beam was noticeably greater than current design codes. Therefore, the spacing limit of 0.75d can be allowed for UHPFRC beams.
Keywords
spacing limit; shear reinforcement; ultra-high performance fiber-reinforced concrete (UHPFRC); shear strength; shear test; failure modes;
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