Study and Analysis of Seismic Retrofitting Technique in Earthquake Prone Area

Earthquake is one of major natural disaster in which many structures damage and collapse due to unacceptable or improper design against seismic motion. Earthquake also affects the economy of the nation and growth rate of the country, so essential proper measures of prevention must be developed for the betterment of the citizens and nation. This deals with a few case studies in which the applications of the most common retrofitting schemes are employed to improve the efficiency and proficiency of either the seismically earthquake damaged buildings. In view of the mixed and complex seismic responses of retrofitted structures, heterogeneous nature of different constructions along with the strain dependent elastic properties of various materials hamper to bring a complete justification of the application of analytical studies. The need of retrofitting of existing earthquake vulnerable buildings may arise due to one or more than one of the following reasons i.e. The buildings have been designed according to a seismic code, but the code has been upgraded in later years. Buildings designed to meet the modern seismic codes, but deficiencies exist in the design and /or construction. Essential buildings must be strengthened like hospitals, historical monuments and architectural buildings. Important buildings whose service is assumed to be essential even just after an earthquake. Buildings, the use of which has changed through the years.