SEISMIC RISK ASSESSMENT BASED ON ATTENUATION RELATION

A micro level study of seismic risk assessment is proposed considering spectrum based on attenuation relation in Indian context. A seismic loss model using regional ground motion attenuation relation which allows specifying hazard on micro-seismic level in terms of source-site parameters of the scenario earthquake is used. The advantage of using attenuation relation in defining hazard scenario is an improvement over the code defined response spectra which assumes the ground motion response as elastic curve which is unrealistic. The damage probability of the buildings is calculated from the performance point obtained by using capacity spectrum approach. The loss model as per HAZUS is adopted for the risk estimation. The proposed methodology is used to estimate the seismic loss of an institutional campus of India as a case study and the estimated direct economic loss is found to be 3,70,70,067 (INR). The methodology can also be used as an effective tool for disaster preparedness.