SEISMIC RETROFITTING OF R.C.FRAMES BY LINEAR STATIC METHOD AT SEVERE ZONE OF SOFT SOIL

B Shivakumara Swamy, Dhananjaiah M

Abstract: Few decades ago people were constructing the building without any future plan and not according to the IS codes. Now a days people need additional floors without demolishing the existing structure for the convenient requirement like commercial/ Residential purpose. Now a days purchasing a land in the urban areas is very costly like Bangalore, Mumbai, Calcutta etc.. like many metropolitan cities. When the Generation population is increased instantly they require space to live, and even for the commercial purpose also they require and instead of purchasing land, an additional floor is added to existing building to live the space for residential (or) commercial purpose. The present work is to study the retrofitting/rehabilitation concept is taken on the weakening points of the structure by using ETABS 9.6.0, standard finite element software by linear static method When we constructing an additional floors to the existing structure, the lower portion means already existing structure will loose the strength, so to regain its strength Rehabilitation technique (Retrofitting method) is attempted. In this paper Retrofitting as a local retrofit strategies of column, column strength will get weaken to increase strength here we have to attempt the concrete jacketting concept, to withstand the heavy load (upper portion load) and to regain its original strength. The parameters checked before and after retrofitting the structure are Story displacement, Base shear carried for different loading, Story drift and Percentage of reinforcement increased.

Keywords: Linear static Analysis, base shear, storey displacement, storey drift, percentage of reinforcement.

DOI: https://doi.org/10.15623/ijret.2015.0416004