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KSCE Journal of Civil Engineering

, Volume 21, Issue 1, pp 296–306 | Cite as

Shear behavior of Reinforced Concrete (RC) beams with circular web openings without additional shear reinforcement

  • Bashir H. Osman
  • Erjun WuEmail author
  • Bohai Ji
  • Suhaib S. Abdulhameed
Structural Engineering

Abstract

The introduction of an opening into a Reinforced Concrete (RC) beam leads to a reduction to both the beam’s stiffness and its overall structural capacity due to stress concentrations and local cracking around the opening. This paper uses both the experimental and finite element (FE) method to analyze the shear behavior of RC beams with opening. The shear span-to-depth ratios (a v /d), opening size, and opening location were considered as the main parameters. The beams were divided into three series according to the shear span-to-depth ratios. Three reinforced concrete beams without openings and one beam with openings were tested experimentally under two-point loading. These beams were considered as control beams so as to validate the FE model using ANSYS14.5 software. A total of 31 specimens were analyzed using ANSYS14.5 while considering the above mentioned parameters. Results showed that the openings located in a high shear region (the line connecting the load and support points) led to the early collapse of the beam. In addition, by comparing the experimental results with those of the non-linear FE analysis, it was concluded that both results were in accordance. An analytical equation for predicting the shear strength of RC beams with circular openings was then proposed, and the obtained results later compared with those from FE model. Furthermore, the developed FE models can serve as a numerical platform for performance predictions of RC beams with different web opening geometries.

Keywords

reinforced concrete beams openings shear capacity finite element analysis shear span -ANSYS14.5 

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References

  1. ACI Committee, A. (2008). Building code requirements for structural concrete (ACI 318M-08) and commentary, American Concrete Institute Google Scholar
  2. ACI (2005). Building code requirements for structural concrete (ACI 318-05) and commentary (ACI 318-05), American Concrete Institute. ANSYS -Release Version 14.5 UP20120918. A finite element computer software and user manual for nonlinear structural analysis, Canonsburg, PA: ANSYS 2012 Inc. ISO 9001.Google Scholar
  3. Aykac, B., Aykac, S., Kalkan, I., Dundar, B., and Can, H. (2014). “Flexural behavior and strength of reinforced concrete beams with multiple transverse openings.” ACI Struct. J., Vol. 111, No. 2, DOI: 10.14359/51686442.Google Scholar
  4. Aykac, B., Kalkan, I., Aykac, S., and Egriboz, Y. E. (2013). “Flexural behavior of RC beams with regular square or circular web openings.” Engineering Structures, Vol. 56, pp. 2165–2174, DOI: 10.1016/j.engstruct.2013.08.043.CrossRefGoogle Scholar
  5. Campione, G. and Minafò, G. (2012). “Behaviour of concrete deep beams with openings and low shear span-to-depth ratio.” Engineering Structures, Vol. 41, pp. 294–306, DOI: 10.1016/j.engstruct.2012.03.055.CrossRefGoogle Scholar
  6. Damian, K., Thomas, M., Solomon, Y., Kasidit, C., and Tanarat, P. (2001). Finite element modeling of reinforced concrete structures strengthened with FRP laminates, Report for Oregon Department of Transportation, Salem.Google Scholar
  7. Elsanadedy, H. M., Almusallam, T. H., Alsayed, S. H., and AL-Salloum, Y. A. (2015). “Experimental and FE study on RC one-way slabs upgraded with FRP composites.” KSCE Journal of Civil Engineering, KSCE, Vol. 19, No. 4, pp. 1024–1040, DOI: 10.1007/s12205-013-0689-y.CrossRefGoogle Scholar
  8. Fahmy, E. H. (1996). “Analysis of composite beams with rectangular web openings.” J. Construct. Steel Res. Vol. 37, No. 1, pp. 47–62, DOI: 10.1016/0143-974X(95)00022-N.CrossRefGoogle Scholar
  9. Fahmy, A., Ezzat, H., and Ahmed A., Hassanein B. (2002). “Analysis of composite beams with Web opening.” 4th Structural Specialty Conference of the Canadian Society for Civil Engineering, Canada, pp. 1–10.Google Scholar
  10. Hasnat, A. and Akhtanizzamam, A. A. (1987). “Beams with small openings under torsion, bending and shear.” J. Struct. Eng., ASCE, Vol. 113, No. 10, DOI: 10.1061/(ASCE)0733-9445(1987)113:10(2253).Google Scholar
  11. Hawileh, R. A., El-Maaddawy, T. A., and Naser, M. Z. (2012). “Nonlinear finite element modeling of concrete deep beams with openings strengthened with externally-bonded composites.” Materials & Design, No. 42, pp. 378–387, DOI: 10.1016/j.matdes.2012.06.004.CrossRefGoogle Scholar
  12. Ibrahim, A. M. and Mahmood, M. S. (2009). “Finite element modeling of reinforced concrete beams strengthened with FRP laminates.” European Journal of Scientific Research, Vol. 30, No. 4, pp. 526–541, ISSN 1450-216X.Google Scholar
  13. Javad, V. A. and Morteza, H. A. (2004). “Effect of small circular opening on the shear and flexural behavior and ultimate strength of reinforced concrete beams using normal and high strength concrete.” Proceedings of the 13th World Conference on Earthquake Engineering, Vancouver. Canada, Paper (No. 3239).Google Scholar
  14. Kachlakev, D. I. and McCurry, D. (2000). Simulated full scale testing of reinforced concrete beams strengthened with FRP composites: Experimental results and design model verification, Oregon Department of Transportation, Salem, Oregon.Google Scholar
  15. Mansur, M. A. (2006). “Design of reinforced concrete beams with web openings.” In Proc. of the 6th Asia-Pacific Structural Engineering and Construction Conference (ASPEC 2006), Kuala Lumpur, Malaysia, pp. 5–6.Google Scholar
  16. Mansur, M. A., Lee, Y. F., Tan, K. H., and Lee, S. L. (1991). “Tests on RC continuous beams with openings.” J. Struct. Eng., Vol. 117, No. 6, pp. 1593–1606, DOI: 10.1061/(ASCE)0733-9445(1991)117:6(1593).CrossRefGoogle Scholar
  17. Mansur, M. A. (1998). “Effect of openings on the behavior and strength of R/C Beams in shear.” Cement and Concrete Composites, Vol. 20, pp. 477–486, DOI: 10.1016/S0958-9465(98)00030-4.CrossRefGoogle Scholar
  18. Mansur, M. A. and Tan, K. H. (1999). “Concrete beams with openings: Analysis and design.” CRC Press, ISBN 0-8493-7435-9.Google Scholar
  19. Mansur, M. A. and Paramasivam, P. (1984). “Reinforced concrete beams with small opening in bending and torsion.” ACI Struct. J., Vol. 81, No. 2, pp. 180–185, DOI: 10.14359/10677.Google Scholar
  20. Mansur, M. A., Tan, K. H., and Lee, S. L. (1985). “Design method for reinforced concrete beams with large openings.” ACI Struct. J., Vol. 82, No. 46, pp. 517–524, DOI: 10.14359/10364.Google Scholar
  21. Mohamed, A. R., Shoukry, M. S., and Saeed, J. M. (2014). “Prediction of the behavior of reinforced concrete deep beams with web openings using the finite element method.” Alexandria Engineering Journal, Vol. 53, No. 2, pp. 329–339, DOI: 10.1016/j.aej.2014.03.001.CrossRefGoogle Scholar
  22. Nasser, K. W., Acavalos, A., and Daniel, H. R. (1967). “Behavior and design of large openings in reinforced concrete beams.” ACI struct. J., Vol. 64, No. 3, pp. 25–33, DOI: 10.14359/7540.Google Scholar
  23. Ožbolt, J., Lettow, S., and Kožar, I. (2002). “Discrete bond element for 3D finite element analysis of reinforced concrete structures.” Proc. of the 3rd International Symposium: Bond in Concrete-from research to standards, Budapest: University of Technology and Economics, p. 4.Google Scholar
  24. Ray, T. (2013). Modeling of multidimensional nonlinear elastic and inelastic structural systems, PhD Thesis, University at Buffalo, SUNY.Google Scholar
  25. Wolanski, A. J. (2004). Flexural behavior of reinforced and prestressed concrete beams using finite element analysis, Milwaukee, Wisconsin (May 2004).Google Scholar

Copyright information

© Korean Society of Civil Engineers and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Bashir H. Osman
    • 1
  • Erjun Wu
    • 1
    Email author
  • Bohai Ji
    • 1
  • Suhaib S. Abdulhameed
    • 1
  1. 1.College of Civil and Transportation EngineeringHohai UniversityNanjingChina

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