Aljawhari, K;
Gentile, R;
Galasso, C;
(2022)
Calibration of Damage-to-loss Ratios for a Case-study Structure.
In:
Proceedings of the 12th National Conference on Earthquake Engineering, NCEE 2022.
Earthquake Engineering Research Institute: Salt Lake City, UT, USA.
Preview |
Text
10677_Aljawhari.pdf - Published Version Download (1MB) | Preview |
Abstract
This study illustrates a simulation-based procedure for calibrating structure-specific damage-to-loss ratios (DLRs), which link the earthquake-induced global damage states (DSs) of a structure with the resulting loss ratios (repair costs normalized by replacement costs). A non-ductile reinforced-concrete frame representative of those built in Italy before the 1970s is selected as a case study. An advanced numerical non-linear model is developed to simulate its dynamic response and failure modes, including flexure, shear, and joint mechanisms. The calibration procedure starts by defining structure-specific DSs describing the increasing structural/nonstructural damage levels and their story-drift thresholds using pushover analysis. Building-level fragility functions are subsequently developed to quantify the probabilities of exceeding each DS given any ground-shaking intensity level. Component-based seismic loss assessment is then performed following the FEMA P-58 approach, which adopts simulation to quantify such losses at multiple ground-shaking intensities. Next, each DLR is statistically characterized by fitting a beta distribution to the component-based loss results upon being conditioned on the corresponding global DS. It is finally shown that the simplified losses obtained by combining the derived DLRs with the building-level fragility functions are highly consistent with their component-based counterparts. This indicates that such DLRs can be easily utilized in seismic risk assessment, particularly for building portfolios, offering a trade-off between accuracy and computational time/effort.
Archive Staff Only
 |
View Item |
