A Strut and Tie Model for Steel Fiber Reinforced Concrete Deep Beams | ||
| International Journal of Advanced Engineering and Business Sciences | ||
| Volume 4, Issue 2, June 2023, Pages 60-86 PDF (812.63 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ijaebs.2023.164909.1045 | ||
| Authors | ||
| Ahmed. A. Mahmoud* 1; F. B. A. Beshra2; A. A. El-Barbary3 | ||
| 1Professor of Reinforced Concrete Structures, Department of civil engineering, faculty of engineering (Shoubra), Benha University,108 Shoubra St., Shoubra, Cairo, Egypt | ||
| 2Associate Professor, Department of civil engineering, faculty of engineering (Shoubra), Benha University,108 Shoubra St., Shoubra, Cairo, Egypt | ||
| 3Assistance Professor of Structural Engineering, Delta Higher Institute for Engineering and Technology, El Mansoura, Egypt | ||
| Abstract | ||
| A modified Strut-and-Tie model (MSTM) was developed for fibrous deep beams to include the contribution of steel fibers in the internal resistance for compression and tension. The proposed (MSTM) calculates the ultimate loads reasonably for several experimental results. The ratio between experimental results and MSTM predictions (Pu(EXP) /Pu(MSTM) ) for 79 specimens is 1.20%. The results of Strut-and-Tie for the American Code (Pu(ACI)) and Egyptian Code (Pu(ECCS)) are more conservative. The inclusion of steel fibers increases the shear carrying capacity of deep beams by 13% and 19% respectively in compassion with ACI Code and the Egyptian Code. The ratio for (Pu(EXP) /Pu(ACI)) and (PuEXP /Pu(ECCS)) are 1.36 and 1.43%, respectively. The predictions of (MSTM) are consistent, accurate, and have a great degree of validation for (HSSFRC) deep beams with different geometrical properties, concrete compressive strength, fibers, main and web steel ratios. A modified Strut-and-Tie model (MSTM) was developed for fibrous deep beams to include the contribution of steel fibers in the internal resistance for compression and tension. The proposed (MSTM) calculates the ultimate loads reasonably for several experimental results. | ||
| Keywords | ||
| Shear strength; high strength concrete; deep beams | ||
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