A Detailed Study on Rectangular RC Beam With Circular Opening Under Torsional Load

Mandala Venugopal*, Asha Patel**, V. Rajesh***
*-*** Assistant Professor, Department of Civil Engineering, St Martin's Engineering College, Hyderabad, India.
** Associate Professor, Department of Civil Engineering, National Institute of Technology-Rourkela, India.
Periodicity:December - February'2017
DOI : https://doi.org/10.26634/jce.7.1.10372

Abstract

Provision of utility and service ducts are important part of modern building construction. To facilitate fast and uninterrupted progress, the layout of these ducts are planned in advance. Their positions are decided considering the head room provisions in buildings, aesthetic look, etc., without jeopardizing the strength, stability and serviceability of the structures. To fulfill these aspects, often ducts have to pass through main load bearing elements like beams. The present work is to explore the behavior of rectangular RCC beams with circular opening under torsion load. The torsional capacity of beams with opening are extracted experimentally. The study is extended by retrofitting the beams with four layers of bidirectional woven GFRP fabric applied by following orientation 90/90/90/90.The restoring torsion capacity, crack patterns are observed and the strength has been increased by retrofitting.

Keywords

RCC, Circular Opening, Torsional Load, GFRP, Retrofitting

How to Cite this Article?

Venugopal, M., Patel, A. and Rajesh, V. (2017). A Detailed Study on Rectangular RC Beam With Circular Opening Under Torsional Load. i-manager’s Journal on Civil Engineering, 7(1), 32-36. https://doi.org/10.26634/jce.7.1.10372

References

[1]. Ameli, M. and Ronagh, H.R., (2007). “Behavior of FRP Strengthened Reinforced Concrete Beams under Torsion”. Journal of Composites for Construction, Vol. 11, No. 2, pp. 192-200.
[2]. ACI Committee 318, (1983). Building Code Requirements for Reinforced Concrete (ACI318-83), American Concrete Institute, Detroit.
[3]. Gobarah A., Ghorbel M., and Chidiac, S. (2002). “Upgrading Torsional Resistance of RC Beams using FRP”. Journal of Composites for Construction, Vol. 6, No. 4, pp. 257–263.
[4]. Hasnat, A., and Akhtaruzzaman, A.A., (1987a). “Beams with Small Rectangular Opening under Torsion, Bending and Shear”. Journal of the Structural Division, American Society of Civil Engineers, Vol. 113, No. 10, pp. 2253-2270.
[5]. Hasnat, A., and Akhtaruzzaman, A.A., (1983a). “An Experimental Investigation to Determine the Ultimate Strength of Reinforced Concrete Beams containing an Opening under Bending and Torsion”. Scientific Research Administration, Faculty of Engineering, King Abdulaziz University, Jeddah, Saudi Arabia, pp. 1-74.
[6]. Hasnat, A. and Akhtaruzzaman, A. A., (1983). “Properties of Concrete using Crushed Brick as Aggregate”. Concrete International, Vol. 5, No. 2, pp. 58-63.
[7]. Abdalla, H.A., A.M. Torkeya, H.A. Haggagb and A.F. Abu-Amira, (2003). “Design against cracking at openings in reinforced concrete beams strengthened with composite sheets”. Composite Structures”, Vol. 60, No. 2, pp. 197-204.
[8]. Hanson, J.M., (1969). Square Openings in Webs of Continuous Joists. Portland Cement Association, Skokie. Ill.
[9]. Hsu, T.T.C.(1968), “Ultimate Torque of Reinforced Rectangular Beams”. Journal of the Structural Division, American Society of Civil Engineers, Vol. 94, No. S1'2, pp. 485-510.
[10]. Hsu, T.T.C., (1968). “Torsion of Structural Concrete - Behavior of Reinforced Concrete Rectangular Members”, Torsion of Structural Concrete, ACI Special Publ. SP-IB, pp. 261-305.
[11]. Mansur, M.A., and Hasnat, A., (1979). “Concrete Beams with Small Opening under Torsion”, Proceedings, American Society of Civil Engineers, Vol. 105, No. ST 11, pp. 2433-2447.
[12]. Mansur, M.A., (1983). “Combined Bending and Torsion in Reinforced Concrete Beams with Rectangular Openings”. Concrete International: Design & Construction, Vol. 5, No. 11, pp. 51-58.
[13]. Mansur, M.A., and Paramasivam, P., (1984). “Reinforced Concrete Beams with a Small Opening in Bending and Torsion”. International Concrete, Vol. 81, No. 2, pp. 180-185.
[14]. Meier, U., and Kaiser, H., (1991). “Strengthening of structures with CFRP laminates”. Advanced Composites Materials in Civil Engineering Structures, pp. 224-232.
[15]. Rubinsky, I.A., and Rubinsky, A., (1954). “An Investigation into the use of Fiber-Glass for Prestressed concrete”. Mag. Concr. Research, Vol. 6, No. 17, pp. 71- 78.
[16]. Naveen Sure, (2013). Experimental and Analytical Study on Torsional Behaviour of RC Flanged Beams and Strengthened with Glass FRP. (Masters Thesis, NIT Rourkela).
[17]. Panchacharam, S., and Belarbi, A., (2002). “Torsional Behaviour of Reinforced Concrete Beams Strengthened with FRP composites”. Proceedings of 1st FIB Congress, Osaka, Japan, pp. 1-10.
[18]. Soroush Amiri, Reza Masoudnia and Ali Akbar Pabarja, (2011). “The Study of the Effects of Web Openings on the Concrete Beams Australian”. Journal of Basic and Applied Sciences, Vol. 5, No. 7, pp. 547-556, 2011, ISSN: 1991-8178.
[19]. Salam, S.A., (1977). “Beams with openings under different stress conditions”. Proc., of 3rd Conference on our World in Concrete and Structures, pp. 259-267.
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