Title:
Experimental Investigation of Deep Beams with High‑Strength Headed Shear Reinforcement, Part I
Author(s):
Dhanushka K. Palipana and Giorgio T. Proestos
Publication:
Structural Journal
Volume:
121
Issue:
3
Appears on pages(s):
135-146
Keywords:
deep beams; high strength; reinforced concrete; reinforcement; shear
DOI:
10.14359/51740486
Date:
5/1/2024
Abstract:
Using normal-strength (Grade 60) and high-strength (Grade 80)
headed bars as shear reinforcement can improve the constructability
of reinforced concrete structures. However, the ACI 318-19
Code does not allow the use of headed bars as transverse reinforcement in deep beams. Similarly, ACI 318-19 does not allow engineers to take advantage of the increased yield strength of Grade 80 reinforcement for use as shear reinforcement. Therefore, to investigate the performance of headed and high-strength transverse
reinforcement on the shear behavior of deep beams, a series of six
large-scale specimens were tested to failure. The member response,
including crack widths and strains in transverse reinforcement,
were examined. The results show that deep beams containing
headed and high-strength transverse reinforcement performed well
compared to companion tests using conventional reinforcement.