Title:
Shear Strength of Steel Fiber-Reinforced Concrete Beams and One-Way Slabs
Author(s):
Sergio M. Alcocer, Ghassan Almasabha, Julian Carrillo, Shih-Ho Chao, and Adam S. Lubell
Publication:
Structural Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
beams; fiber volume fraction; lightweight concrete; minimum shear reinforcement; normalweight concrete; one-way slabs; shear; size effect; steel fibers
DOI:
10.14359/51742138
Date:
7/30/2024
Abstract:
Recent research data was evaluated with the aim of extending the applicability of using deformed steel fiber-reinforced concrete (SFRC) to enhance the shear strength of beams and one-way slabs. Experimental results were assessed for influences on the shear strength of SFRC members that do not contain stirrups of factors including size effect, concrete density (normalweight and lightweight) and compressive strength, fiber volume fraction, and the longitudinal steel reinforcement ratio. Estimates of steel stresses in longitudinal bars at the time of shear failure were carried out to identify differences in members with distinct longitudinal steel ratios and bar grades, consistent with the range of flexural design parameters in ACI CODE-318-19. Results of these analyses and a reliability investigation of design equations applicable to members without fibers were used for proposing new provisions for the shear design of SFRC beams and one-way slabs based on the ACI CODE-318-19 shear strength model.