An Experimental Study on RC Beam with Rectangular Opening: 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:March - May'2017
DOI : https://doi.org/10.26634/jce.7.2.13421

Abstract

In today's modern world, the construction has made vast changes in design. Some of the utility and service ducts are important parts of modern building construction. Web openings in a beam adversely affect its strength and stiffness resulting in excessive deflections, which may lead to unpleasant appearance and collapse of the structure. Therefore, such beams are required to strengthen to restore their strength. The newly developed technique of jacketing the deficit beam with layers of Fiber Reinforced Polymer has proven to be very efficient in restoring and increasing the strength of the beam. The present work is to explore the behavior of rectangular RC beams with rectangular opening under torsion load. The torsional capacity of beams with opening is extracted experimentally. The study is extended by retrofitting the beams with four layers of bidirectional woven GFRP fabric applied by following orientation [0/90]2 . The restoring torsion capacity, crack patterns are observed and the strength has been increased by retrofitting.

Keywords

RCC, Rectangular Opening, Torsional Load, GFRP, Retrofitting.

How to Cite this Article?

Venugopal,M., Patel, A., and Rajesh, V. (2017). An Experimental Study on RC Beam with Rectangular Opening: Torsional Load. i-manager’s Journal on Civil Engineering, 7(2), 15-19. https://doi.org/10.26634/jce.7.2.13421

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, 111.
[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., (1987). “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., (1983). “An Experimental Investigation to Determine the Ultimate Strength of Reinforced Concrete Beams containing an Opening under Bending and Torsion”. Final Report, Research Project No. 01-21, Scientific Research Administration, Faculty of Engineering, King Abdulaziz University, Jeddah, Saudi Arabia, pp. 1-74.
[6]. Hasnat, A., Wafa, F.F., & Akhtaruzzaman, A.A., (1988). “Prestressed concrete beams with small opening under torsion”. Journal of Structural Engineering, Vol. 114, No. 7, pp.1626-1643.
[7]. 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, ISSN 1991-8178, Vol. 5, No. 7, pp. 547-556.
[8]. Hanson, J.M., (1969). “Square openings in webs of continuous joists”. Portland Cement Association, R & D Lab Bull.
9]. Hsu, T.T.C., (1968). “Ultimate Torque of Reinforced Rectangular Beams”. Journal of the Structural Division, Vol. 94, No. 2, pp. 485-510.
[10]. Hsu, T.T.C., (1968). “Torsion of Structural Concrete - Behavior of Reinforced Concrete Rectangular Members”. ACI Special Publication, Vol. 18, pp. 261-306.
[11]. Mansur, M.A. and Hasnat, A., (1979). “Concrete Beams with Small Opening under Torsion”. Journal of the Structural Division, Vol. 105, No. 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]. Meier, U., and Kaiser, H., (1991). “Strengthening of structures with CFRP laminates”. Advanced Composites Materials in Civil Engineering Structures, pp. 224-232.
[14]. Mansur, M.A., and Paramasivam, P., “Reinforced Concrete Beams with a Small Opening in Bending and Torsion”. Journal of the American Concrete Institute, Vol. 81, No. 2, pp. 180-185.
[15]. Rubinsky, I.A., and Rubinsky, A. (1954). “An Investigation into the Use of Fiber-Glass for Prestressed”. Magazine of Concrete Research, Vol. 6.
[16]. Naveen Sure, (2013). Experimental and Analytical Study on Torsional Behaviour of RC Flanged Beams and Strengthened with Glass FRP. (Doctoral dissertation, NIT Rourkela).
[17]. Panchacharam, S., and Belarbi, A., (2002). “Torsional behaviour of reinforced concrete beams strengthened st with FRP composites”. Proceedings 1 FIB Congress, Osaka, Japan, pp. 1-10.
[18]. Mandala Venugopal, Asha Patel, and Vipparthi Rajesh, (2017). “A Detailed Study on Rectangular RC Beam with Circular Opening Under Torsional Load”. i-manager's Journal on Civil Engineering, Vol. 7, No. 1, Dec'16 - Feb'17, Print ISSN 2231-1068, E-ISSN 2249-0779, pp. 32-36.
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