Parametric structure-specific seismic loss estimation
A loss estimation methodology is presented which provides several measures of seismic performance to decision-makers. The is methodology based on parametrically describing several key relationships between: (i) ground motion intensity measure (IM) and exceedance rate ?(IM); (ii) IM and engineering demand parameter (EDP); (iii) EDP and damage states (DS); and (iv) DS and economic loss (L). Both aleatoric and epistemic uncertainties are considered in each of the key relationships. A vector of EDPs is used and correlations between components are considered. The expected loss and standard deviation of loss as a function of the ground motion IM are obtained, allowing various percentile loss hazard curves to be computed. The distribution of Expected Annual Loss (EAL) is obtained for use in budgeting or assessing retrofit solutions. The methodology is applied to a case study of a typical bridge designed to New Zealand Standards.