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Study to Compare the Effeciency of Synthetic Fibers Fabrics in Strengthening R.C Beams with Openings

	International Journal of Scientific Research and Engineering Development (IJSRED)	Full Text:
	Published Issue : Volume-4 Issue-1
	Year of Publication : 2021
	Unique Identification Number : IJSRED-V4I1P56
	Authors : Ibrahim Mohamed Naguib Ismail, Khaled S.A. Morsy, Tarek Aly Elsayed
	: Click Here | DOI : https://doi.org/10.5281/zenodo.4505625

Abstract :

The Openings in beams are very important in the construction at the present time. the need for concrete openings in reinforced concrete beams has begun to pass through electric wires, special water pipes, firefighting, pipelines, adaptations and many services that must be found mainly in these large buildings. Many researchers exerted great efforts to predict and interpret the behavior of beams with openings. They recommended convenient methods for the design of such beams. But at times the openings are made by unqualified persons or without returning to the designed engineer thus exposing the means to weakness and cracks and may reach to the point of collapse. The researchers have found that the (FRP) sheets have excellent properties in load strength. There are currently many types of (FRP) sheets. But the question arises here, what are the advantages and disadvantages of each type when used to strengthen beams with openings? This question is the gate to estimate the most efficient and the most economic FRP strips type.The current thesis tries to give an answer for this question, in which GFRP, CFRP and BFRP strips were used to strengthen and improve the behavior of beams with openings. Eight reinforced concrete beams with rectangular cross section (15cm X 30cm) were tested under two-point static loading. Two beams were taken as a control beams without strengthening, one of them was a solid beam without openings. Each one of the other beams was provided with a rectangular web opening of 30cm length and 15cm height. The beams were divided according to the fiber type into three groups, in each group, two beams were tested under two-point loading. Two strengthening schemes with Three different FRP types (GFRP, CFRP and BFRP strips) were considered.The patterns of cracks, mode of failure, and deformation characteristics (deflection and steel strain tensile) were recorded. Finally, analysis of test results and recommendations were reported. .