Experimental and Numerical Comparison of Reinforced Concrete Gable Roof Beams with Openings of Different Configurations
This paper demonstrates an experimental and numerical study aimed at comparing the influence of openings of different configurations on the flexural behavior of reinforced concrete gable roof beams. The experimental program consisted of testing six simply supported gable beams subjected to mid-point concentrated load. The variable which has been investigated in this work was opening's configuration (quadrilateral or circular) with the same upper and lower chords depth. The results indicate improvement in the beams’ flexural behavior when circular openings were used compared with that of quadrilateral openings, represented by an increase in ultimate load capacity and a decrease in deflection at the service limit. Also, there was an enhancement in the ductility and rigidity of the beams. The results of the tested beams were verified by a nonlinear finite element program, ABAQUS (2018). Comparisons are presented and good agreement is shown between the predictions of the finite element analysis and the experimental results in terms of failure loads and load-deflection relations.
Keywords:reinforced concrete gable roof beam, opening's configuration, chords, numerical analysis
M. A. Mansur, K. H. Tan, Concrete beams with openings: analysis and design, CRC Press, 1999
V. N. Baykov, E. E Seagal, Reinforced concrete structures, Stroyizdat, 1991
S. A. Salam, “Beams with openings under different stress conditions”, in: Proceedings of the 3rd Conference on Our World in Concrete and Structures, CI Premier, 1977
M. A. Mansur, K. H. Tan, S. L. Lee, “Design method for reinforced concrete beams with large openings”, Journal Proceedings, Vol. 82, No. 4, 1985 DOI: https://doi.org/10.14359/10364
M. A. Mansur, Y. F. Lee, K. H. Tan, S. L. Lee, “Tests on RC continuous beams with openings”, Journal of Structural Engineering, Vol. 117, No. 6, pp. 1593-1606, 1991 DOI: https://doi.org/10.1061/(ASCE)0733-9445(1991)117:6(1593)
S. Ehmann, M. Schnellenbach-Held, “Behaviour and design of reinforced concrete beams with large openings”, in: Fracture Mechanics of Concrete Structures, pp. 903-909, Swets & Zeitlinger, 2001
J. V. Amiri, M. H. ALibygie, “Effect of small circular opening on the shear and flexural behavior and ultimate strength of reinforced concrete beams using normal and high strength concrete”, 13th World Conference on Earthquake Engineering, Vancouver, Canada, Paper No. 3239, August 1-6, 2004
A. S. Al-Shaarbaf, N. A. M. J. Al-Bayati, D. I. A. Al-Kaisy, “Nonlinear finite element analysis of reinforced concrete beams with large opening under flexure”, Engineering and Technology Journal, Vol. 25, No. 2, pp. 210-228, 2007
H. Madkour, K. Ahmed, “Three-dimensional modelling for reinforced concrete beams with openings based on nonlinear elastic-damage theory”, Journal of Engineering Sciences, Vol. 35, No. 1, pp. 9-27, 2007 DOI: https://doi.org/10.21608/jesaun.2007.111370
N. H. Saksena, P. G. Patel, “Effects of the circular openings on the behavior of concrete beams without additional reinforcement in opening region using fem method”, International Journal of Advanced Engineering Technology, Vol. 4, No. 2, 2013
A. A. F. Shubbar, H. Alwan, E. Y. Phur, J. McLoughlin, A. Al-Khaykan, “Studying the structural behavior of RC beams with circular openings of different sizes and locations using FE method”, World Academy of Science, Engineering and Technology, International Journal of Structural and Construction Engineering, Vol. 11, No. 7, pp. 849-852, 2017
M. A. J. Hassan, A. F. Izzet, “Serviceability of reinforced concrete gable roof beams with openings under static loads”, Engineering, Technology & Applied Science Research, Vol. 9, No. 5, pp. 4813-4817, 2019 DOI: https://doi.org/10.48084/etasr.3110
B. Aykac, I. Kalkan, S. Aykac, Y. E. Egriboz, “Flexural behavior of RC beams with regular square or circular web openings”, Engineering Structures, Vol. 56, pp. 2165-2174, 2013 DOI: https://doi.org/10.1016/j.engstruct.2013.08.043
ABAQUS/Standard user’s manual, Hibbitt, Karlson and Sorensen, Inc., 2018
FIB, Model code for concrete structures, John Wiley & Sons, 2010
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