Minimum shear reinforcement for ultra-high performance fiber reinforced concrete deep beams. (30th September 2018)

• Record Type: Journal Article
• Authors: Yousef, Ahmed M.; Tahwia, Ahmed M.; Marami, Nagat A.
• Is Part Of: Construction & building materials. Volume 184(2018)
• Page Start: 177
• Page End: 185
• Publication Date: 2018-09-30
• Subjects: Deep beams -- Shear -- Ultra-high performance fiber reinforced concrete (UHPFRC) -- Web reinforcement -- Shear span-to-depth ratio -- Codes -- Finite element model; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2018.06.022
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: The Stirrups have slight effect on the ultimate shear strength of UHPFRC beams. The recommendations of AFGC and KCI are conservative more than the codes. The maximum spacing between stirrups of EC-2 and ECP-203-2017 is applicable. The requirements of ACI318-2014 for Sv, max between stirrups should be increased. The proposed numerical model provides accurate predictions for Vu . Abstract: This research aimed to study the minimum requirements of shear reinforcement for ultra high performance fiber reinforced concrete deep beams. The experimental results showed that increasing the provided vertical web reinforcement ratio has slight effect on the diagonal cracking strength and the ultimate shear strength. The maximum spacing between the vertical web reinforcement required by ACI 318-2014 for reinforced concrete beams ( d/5 ) is not suitable for ultra-high performance fiber reinforced concrete deep beams, while for the EC-2 ( 2b ) and that required by the Egyptian code ECP-203-2017 (200 mm) is applicable. The recommendations of AFGC-2013 and KCI-2012 are safe and conservative more than that required by ACI 318-2014.