A Review on Earthquake Vulnerability Assessment

A large proportion of world’s population lives in regions of seismic hazards, at risk from earthquakes of varying severity and frequency of occurrence. Earthquake causes significant loss of life and damage of property every year. It is important to define the structural damage corresponding to a specific level of ground motion intensity which will provide a good situation for decision makers to reduce the consequences of the earthquakes. If we obtain the structural vulnerability of a component under some levels of ground motion intensity measure (IM) such as Peak Ground Acceleration (PGA), it will result to develop a seismic Fragility curve. Fragility analysis is one of the trending probabilistic seismic performance methodologies. In this method, it is required to define some Damage states (DS) and then according to those states the existence probability of damage related to each state by considering an IM can be compute as fragility curve of that state. Fragility curves are generated from multiple Incremental Dynamic Analysis or IDA curves with the help of traditional curve fitting technique.