Abstract
Available studies on the shear strength of lightweight steel fiber reinforced concrete (SFRC) members without stirrups are scarce. Meanwhile, the overall depth of reported specimens in these prior studies did not exceed h = 300 mm, preventing verification of a so-called size effect in shear for lightweight SFRC. In this paper, the laboratory results of six large-scale lightweight SFRC specimens without stirrups having overall heights from 308 to 1,000 mm and shear span to effective depth ratios of 3.0 are reported. The specimens contained 1 % volume-fraction of hooked-end steel fibers and different longitudinal reinforcement ratios. It was observed that the normalized shear stress at failure decreases with an increase in the member depth. This indicates that a size effect in shear is present for lightweight SFRC members without stirrups. Nevertheless, for all specimens, the observed shear capacities were higher than the shear strengths predicted by the ACI 318-11 and CSA A23.3-04 standards for geometrically similar reinforced lightweight plain concrete members. The fib MC2010 models for lightweight SFRC gave more accurate predictions of strength compared to the ACI 318-11 and CSA A23.3-04 models for lightweight RC members without steel fibers.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
