Research Articles | Challenge Journal of Concrete Research Letters

FLEXURAL BEHAVIOR OF RC BEAMS WITH OPENING

Saeed Ahmed Alsheikh

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Abstract


Providing an opening in beam develops cracks around the opening due to stress concentration. In this paper an experimental works conducted to study the behavior of RC beam with different shapes of opening with varying diameters at different locations. This paper presents the behavior of RC beam with opening unstrengthened by additional reinforcement. In this experimental study 27 beams were casted, one beam without opening as a control beam and the remaining beams were provided with opening. These beams were tested under four-point loading. The effect of size of opening with different locations was studied in terms of ultimate failure load, maximum deflection and failure mode. From the test results, it could be concluded that the ultimate load carrying capacity of the RC beam at shear zone with opening was maximum reduction but at flexure zone showed minimum reduction. Rectangular opening increased the ultimate load reduction than square opening by (4%), while the circular opening reduced the ultimate load reduction than square opening by (8%).

Keywords


rc beams; web opening effect; shear and flexural behavior; rectangular opening; circular opening; depth of beams

References


M.A. Mansur and K.H. Tan, “Concrete Beams with Openings: Analysis and Design,” CRC Press, 1999.

Said M. Allam, “Strengthening of RC beams with large openings in the shear zone,” Alexandria Engineering Journal, V.44, No.1, 2005, pp. 59-78.

M.A. Mansur, “Effect of Openings on the Behavior and Strength of R/C Beams in Shear,” Cement and Concrete Composites, V. 20, 1998, pp. 477-486.

Soroush Amiri, Reza Masoudnia and Ali Akbar Pabarja, “The Study of the Effects of Web Openings on the Concrete Beams,” Australian Journal of Basic and Applied Sciences, 5 (7): 547-556, 2011.

J.G. Niea, C.S. Caib, H. Wua, J.S. Fana, “Experimental and Theoretical Study of Steel-Concrete Composite Beams With Openings in Concrete Flange”, Engineering Structures 28 (2006) 992-1000.

Tamer El-Maaddawy and Bilal El-Ariss, “Investigation into the performance of concrete beams with rectangular openings strengthened in shear with CFRP composites,” (2009).

Subhajit Mondal, J.N.Bandyapadhya and Chandra Pal Gautam, “Strengthening and Rehabilitation of Reinforced Concrete Beams with opening”, Civil Engineering Department, IIT Kharagpur, India. International Journal of civil and Structural Engineering, Volume -2, No.1, 2011.

Soroush Amiri and Reza Masoudnia, “Investigation of the Opening Effects on the Behaviour of Concrete Beams without Additional Reinforcement in Opening Region Using Fem Method”, Australian Journal of Basic and Applied Sciences, 5 (5): 617-627, 2011.

N.F. Somes and W.G. Corley, “Circular openings in webs of continuous beams,” American Concrete Institute, Farmington Hills, Mich, vol. SP42, 1974, pp.359-398.

J.K Lee, C.G. Li and Y.T. Lee (2008). "Experimental Study on Shear Strength on Reinforced Concrete Continuous Deep Beams with Web Opening", the 14th World Conference on Earthquake Engineering.


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