Reinforced fibre concrete deep beams with web openings

Repair of Pre-cracked Reinforced Concrete (RC) Beams with Openings Strengthened Using FRP Sheets Under Sustained Load

“…Equation (1) can be used for calculating shear strength of RC beam containing opening as proposed by Mansur (2006):…”

“…More importantly, this repair technique can be performed while the structure is still in use (Hussein et al 2013). Within the past decade, there has been numerous studies conducted regarding the strength and behavior of RC deep beams with openings (Ashour and Rishi 2000;Campione and Minafò 2012;El Maaddawy and Sherif 2009;Mansur and Alwis 1984;Shanmugam and Swaddiwudhipong 1988;Zhang et al 2004). Hussain and Pimanmas (2015) conducted an extensive experimental program to elevate the shear strength of RC deep beams with openings strengthened with Sprayed Glass Fiber Reinforced Polymer (SGFRP) composites.…”

“…The results of these investigations have demonstrated the effectiveness of different opening geometries and different FRP systems such as sheet, wrap and strips to attain the desired effects. It should be noted that most studies presented in literature focus on the shear behavior and strength of RC shallow beams with openings (Mansur 2006;Osman et al 2016;Torunbalci 2002;Aykac et al 2013).…”

Nonlinear finite element modeling of concrete deep beams with openings strengthened with externally-bonded composites

“…The reduction in the shear capacity depends on the degree of interruption of the natural load path that is the line connecting the load and support points. The reduction in shear capacity is more significant when the opening fully interrupts the natural load path [5][6][7].…”

Finite Element Analysis of Behavior of Post Tensioned Concrete Beams With Openings in Shear Regions.

“…Siao and Yap (1990) stated that that the beams fail prematurely by sudden Formation of diagonal crack in the compression chord when no additional reinforcement is provided in the members near the opening (chord members) [4]. Mansur et al (1991) tested eight (8) RC continuous beams, each containing a large transverse openings and found an increase in depth of opening led to a reduction in collapse load [5]. Mansur (1998) [6], discussed about the effects of transverse opening on the behavior and strength of RC beams under predominant shear and stated that opening represents a source of weakness and the failure plane always passes through the opening, except when the opening is very close to the support so as to bypass the potential inclined failure plane.…”