Loss Model for Seismically Damaged Structures
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Loss ratio which is the ratio of the repair cost to the total replacement cost is an effective parameter to represent structural and non-structural damage caused by earthquakes. A probabilistic loss estimation framework is first presented that directly relates hazard to response and hence to losses. A key feature of the loss estimation approach is the determination of losses without need for customary demand-side fragility curves. Relationships between intensity measures and engineering demand parameters are used to define the demand model. An empirically calibrated loss model in the form of a power curve with upper and lower cut-offs is used in conjunction with the demand model in order to estimate loss ratios. Loss ratios for each of the damage states take into account epistemic uncertainty as well as an effect for price surge following a major hazardous event. The loss model is calibrated and validated for different types of welded steel moment frame buildings. The loss model is then transformed to provide a composite seismic hazard-loss relationship which is used to estimate expected annual loss for the different structures. 2009 ASCE.
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author list (cited authors)
Mander, J. B., & Sircar, J.
complete list of authors
Mander, John B||Sircar, Jyotirmoy