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Commenced in January 2007 Frequency: Monthly Edition: International Publications Count: 29829


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10007518
Studying the Structural Behaviour of RC Beams with Circular Openings of Different Sizes and Locations Using FE Method
Abstract:

This paper aims to investigate the structural behaviour of RC beams with circular openings of different sizes and locations modelled using ABAQUS FEM software. Seven RC beams with the dimensions of 1200 mm×150 mm×150 mm were tested under three-point loading. Group A consists of three RC beams incorporating circular openings with diameters of 40 mm, 55 mm and 65 mm in the shear zone. However, Group B consists of three RC beams incorporating circular openings with diameters of 40 mm, 55 mm and 65 mm in the flexural zone. The final RC beam did not have any openings, to provide a control beam for comparison. The results show that increasing the diameter of the openings increases the maximum deflection and the ultimate failure load decreases relative to the control beam. In the shear zone, the presence of the openings caused an increase in the maximum deflection ranging between 4% and 22% and a decrease in the ultimate failure load of between 26% and 36% compared to the control beam. However, the presence of the openings in the flexural zone caused an increase in the maximum deflection of between 1.5% and 19.7% and a decrease in the ultimate failure load of between 6% and 13% relative to the control beam. In this study, the optimum location for placing circular openings was found to be in the flexural zone of the beam with a diameter of less than 30% of the depth of the beam.

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References:

[1] Majeed, H. Q., 2012. Experimental and Numerical Study of the Effects of Creating Openings in Existing RC Beams and Strengthening with CFRP. Eng. & Tech. Journal, 30(15), pp. 2550-2561.
[2] Chin, S., Shafiq, N. & Nuruddin, M., 2011. Strengthening of RC Beams Containing Large Opening at Flexure with CFRP laminates. World Academy of Science, Engineering and Technology, 5(12), pp. 743-749.
[3] Saksena, N. H. & P.G.patel, P., 2013. Experimental Study of Reinforced Concrete Beam with Web Openings. International Journal of Advanced Engineering Research and Studies (IJAERS), 2(3), pp. 66-68.
[4] Oukaili, N. K. & Al-Shammari, A. H., 2014. CFRP Strengthening of RC Beams with Multiple Openings Subjected to Static and Impact Loads. Advances in Structural Engineering, 17(12), pp. 1747-1760.
[5] Saksena, N. H. & P.G.patel, P., 2013. 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 (IJAET), Iv(2), pp. 40-42.
[6] AL-Sheikh.S, 2014. Flexural Behavior of RC Beams with Opening. ISSRES, 5(2), pp. 812-824.
[7] Al-Sulayfani, B. J. & Al-Hamdani, F., 2013. Behavior of Reinforced Concrete Beams with Openings in Shear Zone under Repeated Loading. Al-Rafidain Engineering, 21(5), pp. 14-27.
[8] Alsaeq, H. M., 2013. Effects of Opening Shape and Location on the Structural Strength of R.C. Deep Beams with Openings. World Academy of Science, Engineering and Technology, 7(6), pp. 494-499.
[9] Hafiz, R. B., Ahmed, S., Barua, S. & Chowdhury, S. R., 2014. Effects of Opening on the Behavior of Reinforced Concrete Beam. IOSR Journal of Mechanical and Civil Engineering, 11(2), pp. 52-61.
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