Retrofitting of Existing Buildings and Bridges Columns Using FRP (Fiber Reinforced Polymer) Sheets

Abstract

The old RCC buildings and bridges have outlived their durability due to continuous environmental effects or these are being used other than those for which these were originally designed. Moreover, the existence of old RCC buildings and bridges in the earthquake prone regions is also a serious hazard to life and property. Due to economic constraints, the old distressed structures are being used with complete disregard to loss of human lives. The RCC buildings and bridges contain several structural components, among which column is the most important member. Columns are primarily designed for axial compression loading and in case of its failure; structure collapse can occur which results in loss of life and property. So, it requires the rehabilitation and retrofitting. For many existing structures, to meet the requirements of these new codes, proper strengthening schemes must be implemented. Among various strengthening techniques, the application of fiber reinforced polymer (FRP) has recently drawn a wide attention due to its advantages such as high strength to weight ratio, corrosion resistance, and ease of execution. FRP confinement can be used to increase the load carrying capacity, and increase the ductility. A wide range of applications of FRP materials have been implemented including strengthening of deteriorated structures using FRP sheets and using FRP rods as reinforcement instead of steel rods. There has been a remarkable increase in the use of FRP sheets, especially carbon and aramid