Strengthening and Crack Prevention of Conventional Rc Structure by Retrofitting Technique

Abstract

The project is about Strengthening and Crack prevention of Conventional RC Structure by Retrofitting Technique. Many of existing reinforced concrete structures throughout the world are in need of repair, rehabilitation or reconstruction because of deterioration due to various factors like corrosion, failure of bonding between beam and column joints and increase in service loads etc. In our project we use the retrofitting technique as a strength improvement technique in the early construction stage. In this study twenty-seven cylinders were casted and few were cracked to Retrofit with two and four layers of Glass Fiber Reinforced Polymer (GFRP) Wrap and few were simply Wrapped for strengthening aspect before the Specimen becomes deteriorated and each were tested to failure in axial compression. A simple analysis for circular cylinders reveals that the confining effect of the Wrap is not engaged until the concrete actually starts failing and dilating. The behavior of conventional concrete cylinders strengthened using Glass Fiber Reinforced Polymer Wrap (GFRP) subjected to loading and the results obtained have been compared. As a result, the objective of this laboratory work is to improve the structural integrity and increase the compressive strength and stiffness of the cracked cylinders after Wrapping.