Muthanna Journal of Engineering and Technology
Volume (11), Issue (2), Year (30 December 2023), Pages (47-61)
DOI:10.52113/3/eng/mjet/2023-11-02/47-61
Research Article By:
Hussein Kamal Kadhim and Mazin Diwan Abdullah
Corresponding author E-mail: pgs.hussein.kamal@uobasrah.edu.iq
ABSTRACT
The study numerically examined eight concrete deep beam specimens seven with strut and one reference with normal reinforcement the reinforcement quantity varied among the specimens, yet none exceeded the amount present in the reference sample. In instances where an excessive amount of reinforcement was situated in the strut area, it was judiciously redistributed to bolster the reinforcement configuration of the specimens. The specimen tested using abaqus program. Upon examining the results, it was observed that the strut reinforcement technique was more effective than conventional reinforcement, providing an (5% to 10%) increase in maximum load capacity depending on the type of concrete used. Additionally, it resulted in a decrease of (6 to 42%) in the amount of compression reinforcement needed. The study also revealed that having additional reinforcement, such as shear reinforcement or any other reinforcement, in the mid-span of a deep beam and away from the stress zone does not provide any significant benefit, unlike reinforcement in the stress zone, which increases the strength of the beam. It was also noted that cracks are formed in the shear and flexural zones at reference specimen when a load less than the specimens with strut is applied. The displacement in specimens with strut was less than of reference sample. It was also found that strain in specimens with strut reinforcement was lower than in reference specimen.
Keywords: Deep beam, Strut and tie specimen, Reinforcement strut, strain, two points load, Abaqus program.