High rise building in coastal zones areas are strained to environment force such as high wind pressure, stroms , cyclons , seismic activities. The combination of these factor may lead to the deteriotion of the structural members loss in strength, stability issue , durability .And Retrofitting as become more effective to improve the strength, durability and the performance of the structures. Various retrofitting technique like using shear walls is considered as main effective methods to enhance the strength , different loads resistance of tall structure. Shear walls is a vertical structure element which provides the stiffness and strength against the lateral loads like wind and earth quake forces, and it will improve the overall stability and safety of the building. And this methods will reduce the building sway and torsional and storey drifts. By using the ETABS Software it is more useful in analyse, evaluate the nature of the retrofitted tall structure by using the shear walls under various load condition. This is the platform to withstand the wind, seismic and gravity loads to assess the building response before and after the retrofitting. In the coastal zones, the building are affected to corrosion and environment effect. the retrofitting of high rise buildings with the shear walls will improve the strength and the long-term life of the structure, and reduces the maintenance coast and must ensure the compliance with the design codes and safety standards.

This analysis compares the seismic activities of the high rise building before and after retrofitting with shear wall. The both models (symmetric and asymmetric) were analysed and evaluated using the Static and dynamic methods. The symmetric high rise building retrofitted with shear walls will give more strength and improve the stability of the structure. In this study symmetric high rise building retrofitted with shear walls the distribution of loads will be uniform in which it gives increase in max base shear (20-50% increases), storey stiffness (40-75% increases) and decrease in storey displacement (30-60% decreases) and storey drift (30-60% decreases).. The Asymmetrical high rise building retrofitted with shear walls it does not have stability compared to symmetric, it shows torsional irregularities and non-uniform stiffness. In this study symmetric high rise building retrofitted with shear walls the distribution of loads will be uniform in which it gives increase in max base shear(30-60% increases) ,storey stiffness (50-80% increases) and decrease in storey displacement (40-70% decreases) and storey drift(40-70% decreases). Asymmetrical high rise building after retrofitting shows more improve in strength and stability, but still it does not show stability as compared to the symmetric. But in constructing the high rise building in coastal areas a symmetric method is the best method retrofitting with using shear walls

1.FEMA P: Seismic Retrofit Guidelines for seismic retrofit method and create and existing lateral forces, enhance components which include the addition of shear walls. 2.FEMA P B 2008: Techniques for the seismic Rehabilitation of existing buildings. 3.B S Tara Nath : Reinforced concrete design of tall buildings. 4.Singh R, Singh K.V: Analysis of seismic loads acting on multi storey building. 5.Rahman A.S :Seismic Response of vertically irregular RC Frames with stiffness irregularities. 6.Anuj Chandra and Ganesh Jaiswal: Retrofitting of structure using composite material FRP 7.Moreno J: Tall building system and their concept. 8.Council on Tall Building and urban Habitat: Structural system for tall buildings. 9.Neville A:Creep of concrete and Behaviour of structures. Vinay V.Gupta: Performance based on design of RC Structures which is subjected to seismic loads using retrofitting method with steel bracing