Naim Asif, Singh B. K; International Journal of Advance Research, Ideas and Innovations in Technology © 2018, www.IJARIIT.com All Rights Reserved Page | 592 ISSN: 2454-132X Impact factor: 4.295 (Volume 4, Issue 4) Available online at: www.ijariit.com Seismic retrofitting of existing reinforced concrete building Asif Naim asifnaimbe@gmail.com Al-Falah University, Dhouj, Haryana Dr B. K Singh binodkrs@yahoo.com Al-Falah University, Dhouj, Haryana ABSTRACT It is commonly observed that many RC Building collapses during an earthquake are those building which is non –engineered or those RC Buildings which are not constructed as per codal provisions. Some of such buildings have deficiencies in whole structure or individual structural members which don’t have the adequate lateral capacity to counter the seismic demand. Before retrofitting of structure it is required to perform necessary assessments and evaluations of structural member or location deficiencies are found. In this case study, a G+3 storey RC Building is considered for seismic analysis which is located in the zone –IV to calculate the additional seismic strength of structural members like beams and columns. Based on this analysis retrofitting measures are suggested. This analysis is performed by using Stad pro-V8i software. The recommendations are based on IS – 15988, IS – 1893, IS – 13920 and FEMA codes provisions. The method adopted for seismic retrofitting of structures is RC Jacketing. Keywords— Non-engineered RC Building, Seismic Demand, Seismic Retrofitting, Seismic Strength, RC Jacketing and Lateral Capacity 1. INTRODUCTION An earthquake is the sudden vibration of the ground surface because of the movement of tectonic plates under the ground surface, which releases sudden energy in the crust. Earthquake makes the ground surface moves in all direction. During an earthquake the lateral movements of ground surface major failures in structure or structural members like beams and columns generally. In India Earthquake resistance designs are not so popular, very rear buildings are designed earthquake resistant. In India, buildings are designed only to resist gravity loads. Such buildings are unable to resist to resist seismic loading or horizontal loading. Due to successive earthquake like Latur earthquake in 1993 and Katch earthquake in 2001 underlines the need for earthquake resistant design. Earthquake resistant designs are done by seismic retrofitting of the existing structure. Fig. 1: Latur Earthquake Fig. 2: Katch Earthquake Seismic retrofitting is a technique for the modification of the existing structure to make them resistant against the motion of the ground or soil failure during an earthquake.