Seismic Risk Assessment of Asymmetric Frame Buildings using Fragility Curves
|International Journal of Civil Engineering|
|© 2020 by SSRG - IJCE Journal|
|Volume 7 Issue 5|
|Year of Publication : 2020|
|Authors : Upasana R. Rana, Snehal V. Mevada, Vishal B. Patel|
How to Cite?
Upasana R. Rana, Snehal V. Mevada, Vishal B. Patel, "Seismic Risk Assessment of Asymmetric Frame Buildings using Fragility Curves," SSRG International Journal of Civil Engineering, vol. 7, no. 5, pp. 1-9, 2020. Crossref, https://doi.org/10.14445/23488352/IJCE-V7I5P101
Risk assessment is a useful tool for determining ultimate behavior of structures subjected to highly unpredictable and uncertain dynamic forces produced from earthquakes. Fragility curves are the best representation of risk assessment. In the present study, risk assessment and fragility analysis of asymmetric structures subjected to seismic loading are evaluated. Further, the effects of various eccentricities on seismic risk assessment are also studied. The fragility curves are developed for different cases of eccentricities and various structural configurations of 5 storied RCC bare frame building. The considered buildings are subjected to ground motions of past recorded earthquakes. Incremental Dynamic Analyses carried out to evaluate the responses of the considered buildings subjected to earthquake excitations. Considering various performance levels as per ATC-40, Monte Carlo is the method used to develop fragility curves. It is observed that for immediate occupancy failure criteria, the probability of failure is increased constantly with increasing the percentage of structural eccentricity. Further, very less variation is observed in the probability of failure under life safety and collapse prevention failure stages.
Risk Assessment, Fragility Curves, Seismic load, Incremental Dynamic Analysis
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