Comparison of damage index and fragility curve of RC structure using different Indian standard codes

Abstract

In today’s world, there is much talk about seismic vulnerability, its features and the necessity of study. The main problem that is faced in today’s world is knowledge about proper quantification of damage. The response is obtained after the ground motion has been imparted on the structure. Despite of making significant progress in the field of seismic design codes for dynamic analysis, there is a lack of progress in the quantification of damage. The damage criterion should include large displacements as well as the effect of repeated cyclic loading. An energy-based damage model is used to assess the damage index for the structure taking into account the effect of repeated cycles. The present study has been done to carry out the vulnerability analysis of a four-storey reinforced concrete (RC) moment resisting frame by modified Park and Ang damage model which is then compared by different Indian standard code for earthquake resistant design. A new damage scale has been proposed for each of the analysis against an individual code. Each of the fragility parameter has been individually calculated in carrying out this analysis. Fragility curve is plotted by calculating the uncertainty and the median values.