Comparative study on Seismic fragility analysis of RCC building in different soil conditions

Abstract: Human and economic losses due to natural calamities that occurred in past many decades increased the researchers concern to revaluate the building stock to decrease these casualties. After experiencing few vulnerable earthquakes seismic evaluation of structure has become vital even post-earthquake assessment are emphasized. This study will cover an approach to assess a seismic vulnerability of earthquake. Seismic fragility curves are developed based on nonlinear dynamic analysis considering appropriate failure mechanisms. Seismic fragility curves are used mainly by decision makers for the assessment of seismic losses both for pre-earthquake disaster planning as well as post-earthquake recovery programs. Fragility curves - show the probability of failure versus peak ground acceleration. The primary motivation of seismic fragility assessment is to obtain an estimate of the probability of exceedance of a given damage level in a building due to a seismic hazard to predict its vulnerability. Seismic behaviour of structure that is built on soft soils is mainly influenced by the soil properties, and the structural response is considerably different from the fixed base condition beholding to the interaction between the structures and the ground.

Keywords: Fragility curves, seismic parameters, Pushover analysis, Seismic Vulnerability.