jce.7.2.13421 An Experimental Study on RC Beam with Rectangular Opening: Torsional Load Mandala Venugopal Asha Patel Vipparthi Rajesh Journal on Civil Engineering 2249-0779 7 2 15 19 RCC, Rectangular Opening, Torsional Load, GFRP, Retrofitting 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. March-May 2017 Copyright © 2017 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=13421