BEHAVIOR OF REINFORCED CONCRETE CONTINUOUS DEEP BEAMS WITH OPENINGS AND USING MULTIPLE TYPES OF STRENGTHING

Huda Basim kitab; Muhammad Abed Attiya

doi:10.30572/2018/KJE/150301

Authors

Huda Basim kitab Civil Engineering, Department Faculty of Engineering, University of Kufa, Najaf, Iraq.
Muhammad Abed Attiya Civil Engineering, Department Faculty of Engineering, University of Kufa, Najaf, Iraq

DOI:

https://doi.org/10.30572/2018/KJE/150301

Keywords:

Strengthen, Near Surface Mounted, Deep Beam, Failer Mode, Crack Patterns

Abstract

In this research, thirteen specimens of reinforced concrete continuous deep beams were cast and tested. One was the main reference without openings, three were a reference for each style depending on the arrangement of the openings, while the other nine were strengthen beams using NSM technology. Three models were used to implement the strengthening (horizontal, vertical and inclined). The results showed an increase in load capacity after applying strengthening to the specimens, as well as an improvement in stiffness and ductility. The specimens with inclined strengthening gave the highest increase in load capacity The increase rates ranged between (19%-30%), The specimens with horizontal strengthening gave an increase ranging between (7%-26%), The specimens with vertical strengthening also gave an increase ranging between (7%-22%).

Downloads

Download data is not yet available.

References

Chin, S. C., & Doh, S. I. (2015). Behaviour of reinforced concrete deep beams with openings in the shear zones. Journal of Engineering and Technology (JET), 6(1), pp.60-71.‏

, ACI Committee, 2019. Building Code Requirements for Structural Concrete (ACI 318-19). Farmington Hills: American Concrete Institute.

Al-Bdari, W. J., Al-Bayati, N., & Al-Shaarbaf, A. S. (2020, February). Structural behaviour of SCC continuous deep beam strengthened with carbon fiber NSM and hybrid techniques. In IOP Conference Series: Materials Science and Engineering (Vol. 737, No. 1, p. 012026). IOP Publishing.‏

Al-Issawi, A. S. H., & Kamonna, H. H. (2020). Experimental study of RC deep beams strengthened by NSM steel bars. Materials Today: Proceedings, 20, 540-547.‏

Al-Bdari, W. J., Al-Bayati, N. A., & Al-Shaarbaf, I. A. (2021). Structural Behavior of Retrofitted Reinforced SCC Continuous Deep Beam With CFRP and Hybrid Techniques. Engineering and Technology Journal, 39(7), 1153-1163.‏

Beshara, Fouad B.A.; Shaaban, Ibrahim G.; Mustafa, Tarek S., 2012. Behavior of Reinforced Concrete Continuous Deep Beams in Shear. Engineering Research Journal, 10 Jul, Volume 17.

Hosen, M. A., Jumaat, M. Z., & Islam, A. S. (2015). Side Near Surface Mounted (SNSM) technique for flexural enhancement of RC beams. Materials & Design, 83, pp.587-597.‏

Kamonna, H. H., & Alkhateeb, L. R. (2020). Strengthening of reinforced concrete deep beams with openings by near surface mounted steel bar. Journal of Engineering Science and Technology, 15(4), pp.2559-2579.‏

Karimizadeh, H., Arabzadeh, A., Eftekhar, M. R., & Amani Dashlejeh, A. (2022). Shear Strengthening of RC Deep Beams with Symmetrically or Asymmetrically Positioned Square Openings Using CFRP Composites and Steel Protective Frames. Advances in Civil Engineering, 2022(1), 5352330.‏

Khalaf, M. R., Al-Ahmed, A. H. A., Allawi, A. A., & El-Zohairy, A. (2021). Strengthening of continuous reinforced concrete deep beams with large openings using CFRP strips. Materials, 14(11), 3119.‏

Lafta, Y. J., & Ye, K. (2016). Specification of deep beams affect the shear strength capacity. Civil and Environmental Research, 8(2), 56-68.‏

Mansour, M., & El-Maaddawy, T. (2021). Testing and modeling of deep beams strengthened with NSM-CFRP reinforcement around cutouts. Case Studies in Construction Materials, 15, e00670.‏

Ramesh, B., & Eswari, S. (2020). Structural response of GFRP strengthened hybrid fibre reinforced concrete beams. Materials Today: Proceedings, 33, pp. 463-469.‏

Yang, K.H. and Ashour, A.F. (2008) Effectiveness of Web Reinforcement around Openings in Continuous Concrete Deep Beams. ACI Structural Journal, Vol. 105, No. 4, pp. 414-424.

Zhou, Y., Gou, M., Zhang, F., Zhang, S., & Wang, D. (2013). Reinforced concrete beams strengthened with carbon fiber reinforced polymer by friction hybrid bond technique: Experimental investigation. Materials & Design, 50, pp. 130-139.‏