Shear and Bending Performances of Reinforced Concrete Beams with Different Sizes of Circular Openings

Abstract

The present study pertains to the effects of transverse opening diameters and shear reinforcement ratios on the shear and flexural behavior of RC beams with two web openings across different spans, i.e., a single opening in each half-span. Within the scope of the study, a total of 12 RC beams with five different opening diameter-to-beam depth ratios (0, 0.20, 0.27, 0.33, 0.40, and 0.47) and two shear reinforcement ratios were tested to failure under four-point bending. The load capacities, ductilities, rigidities and energy dissipation capacities in the elastic and plastic ranges of beam behavior were compared. Furthermore, the load capacities of the beams were compared to the existing analytical shear strength formulations in the literature. The test results indicated that whether an RC beam with openings has adequate or inadequate amounts of shear reinforcement, the frame-type shear failure becomes much more pronounced with increasing opening diameter. The reductions in the load capacity and modulus of toughness with increasing opening diameter are more considerable in the presence of inadequate amounts of shear reinforcement, while the beam ductility is less affected in shear-deficient RC beams with openings as compared to the ones with adequate shear reinforcement.

Strength of Hybrid Steel-BFRP Reinforced Concrete Beams with Openings in the D-Region Strengthened Internally and Externally

“…Due to this conclusion, the current study focused on rectangular shapes as the worst case. The previous study for circular openings was also confirmed by [23]. The authors in [24] noted that the test results revealed a trivial difference between opened beams and control beams up to an opening size of 100 mm in length.…”

Experimental investigations: Reinforced Concrete Beams Bending Strength with Brine Wastewater in Short Age

“…After experimenting with a wide variety of materials, manufacturers of concrete and reinforced concrete were able to refine their processes and product offerings to meet a wide variety of needs [1][2][3]. From an economic and environmental standpoint, waste creation and disposal is an issue of fundamental relevance for growth at the present moment, with direct consequences for sustainability [4][5][6].…”