Seismic Fragility Estimates of Regular and Irregular Structures with Different Soil Conditions Using Time History Analysis.

Over the years, in the study of earthquakes, there has been a shift in the use of current force-based methodology to performance-based methodology. In this study, an attempt has been made to study the seismic performance of regular and vertically irregular structures by making use of time history analysis to establish seismic fragility estimates. To perform the analysis, three Indian strong ground motions have been considered by varying soil conditions. Comparison has been made in terms of displacement and spectral accelerations for both regular and irregular structures with different soil conditions. The study highlights the importance of obtaining performances in terms of Operational Phase (OP), Immediate Occupancy (IO), Damage Control (DC), Life Safety (LS), and Collapse Prevention (CP). The seismic vulnerability of buildings has been obtained treating the foundation as isolated footing in terms of damages by taking strong ground motion data into consideration to perform performance-based analysis of structures with different soil conditions. [ABSTRACT FROM AUTHOR]