Page 18 - June-2022

TECHNICAL PAPER

that the shear design provisions of the current codes were [6] Sumpter, M. S., Rizkalla, S. H., and Zia, P. (2009). “Behavior
very conservative for these types of beams. of high-performance steel as shear reinforcement for
3) All tested beams did not show the diagonal shear cracks at concrete beams”, ACI Structural Journal, Vol. 106,
60 % of their design loads (taken as the service load) and No. 2, pp. 171-177.
thus, the serviceability criteria were satisfied in the beams [7] ASTM A1035/A1035M-07 (2007). “Standard specification
reinforced with high-strength transverse steel of yield for deformed and plain, low-carbon, chromium, steel bars
strengths in the range of 500-600 MPa. Irrespective of the for concrete reinforcement”, ASTM International, West
failure modes, the yielding of longitudinal steel followed by Conshohocken, PA, USA.
the yielding of transverse reinforcement was noted in all test
specimens except the beam having the shear-span ratio of [8] Munikrishma, A., Hosny, A., Rizkalla, S., and Zia, P. (2011).
1.7 in which the yielding of Fe-600 grade steel stirrups was “Behavior of concrete beams reinforced with ASTM A1035
observed. Grade 100 stirrups under shear”, ACI Structural Journal,
Vol. 108, No. 4, pp. 34-41.
4) The current code provisions can be safely adopted in
the shear design of concrete beams of low a/d ratios and [9] Lee, J. Y., Lee, D. H., Lee, J. E., and Choi, S. H. (2015).
reinforced with high-strength steel reinforcement. The “Shear behavior and diagonal crack width for reinforced
peak shear loads in test specimens having a/d ratios less concrete beams with high-strength shear reinforcement”,
than 1.7 exceeded the maximum shear strengths allowed ACI Structural Journal, Vol. 112, No. 3, pp. 323-334.
[3]
in the ACI 318-19 code. The shear design provisions of
[24]
both CSA A23.3-04 and ACI 318-19 are adequate for [10] Hassan, T. K., Seliem, H. M., Dwairi, H., Rizkalla, S. H., and
[3]
reinforced concrete beams with high-strength stirrups for Zia, P. (2008). “Shear behavior of large concrete beams
the low a/d ratios as well. reinforced with high-strength steel”, ACI Structural
Journal, Vol. 105, No. 2, pp. 173-179.
ACKNOWLEDGEMENTS [11] Ou, Y. -C., and Kurniawan, D. P. (2015). “Shear behavior of
The financial support received from the Science and Engineering reinforced concrete columns with high-strength steel and
Research Board, Department of Science and Technology, India concrete”, ACI Structural Journal, Vol. 112, No. 1,
under the FIST grant is highly acknowledged. The authors would pp. 35-45.
like to thank M/s Jindal Steel and Power Limited for providing [12] Yu, Q., and Bažant, Z. P. (2011). “Can stirrups suppress
the steel reinforcement bars to carry out this research. The size effect on shear strength of RC beams?” ASCE Journal
help and support received from the staff members of Heavy
Structures Laboratory, IIT Delhi is highly appreciated. Structural Engineering, Vol. 137, No. 5, pp. 607-617.
[13] Kani, G. N. J. (1967). “How safe are our large reinforced
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[4] Hara, N., Mishima, T., Yamada, T., and Kondoh, M. (2001). [16] Shin, D., Haroon, M., Kim, C., Lee, B. S., and Lee, J. Y.
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[5] Lee, J. -Y., Choi, I. -J., and Kim, S. -W. (2011). “Shear [17] Andermatt, M. F., and Lubell, A. S. (2013). “Behavior
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28 THE INDIAN CONCRETE JOURNAL | JUNE 2022