Analysis and design of retrofitting of an existing building for columns by SFRC, RC, FRP jacketing techniques

The objectives of this paper is to design SFRC, RC and FRP Jacketing of failed columns of an existing building and to compare suitability of these three methods of retrofitting. The presented work also describes design procedure of Reinforced Concrete, Carbon Fiber Reinforced Polymer Jacketing and Steel Fiber Reinforced Polymer Jacketing for strengthening existing columns. There is a large world-wide need for simple and reliable methods to repair and strengthen aging infrastructure and buildings. The use of FRP Jacketing offers several advantages over the RC and SFRC Jacketing but it is slightly expensive. Retrofitting is a technique to enhance the structural capacities including the strength, stiffness, ductility, stability, and integrity of a building that is found to be deficient or vulnerable. It can effectively raise the performance of a building against earthquake to a desired level, and to even satisfy the requirements of an upgraded design seismic code. The building need not be deteriorated or damaged. The retrofit is intended to mitigate the effect of a future earthquake. It is seen that the overall performance of the column significantly improves after jacketing.