Calculating costs and benefits of investing in retrofitting
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Vitor Silva of the GEM Foundation in Italy analyzed the costs and benefits of retrofitting buildings in Nepal. The analysis considered 2221 locations, 9144 assets across 5 categories, and an area of around 140,000 square kilometers. Models were used to calculate expected damage and losses from earthquakes of different magnitudes, and to compare the annual losses expected with and without retrofitting to determine the benefit-cost ratio of retrofitting. Maps of seismic hazard and optimal retrofit designs were also produced to inform decision making.
Calculating costs and benefits of investing in retrofitting
- 1. Vitor Silva GEM Foundation, Pavia, Italy Calculating costs and benefits of investing in retrofitting
- 2. Calculating costs and benefits of investing in retrofitting Region of interest: Nepal 1. 2221 locations 2. 9144 assets 3. 5 taxonomies 4. ≈140.000 km2 5. Number, area, economic value, retrofitting cost.
- 3. Calculating costs and benefits of investing in retrofitting Scenario Risk Calculator Magnitude: 7.0 Mw, Mean loss: 8.7 billion EUR, Standard deviation: 2.1 billion EUR
- 4. Calculating costs and benefits of investing in retrofitting Scenario Damage Calculator Magnitude: 7.0 Mw Damage distribution per asset Total damage distribution Damage distribution per taxonomy
- 5. Calculating costs and benefits of investing in retrofitting Scenario Damage Calculator Magnitude: 7.0 Mw
- 6. Calculating costs and benefits of investing in retrofitting Benefit/Cost Ratio Calculator Pre-code and retrofitted vulnerability functions. Original vulnerability model Retrofitted vulnerability model
- 7. Calculating costs and benefits of investing in retrofitting 0 3000 6000 9000 12000 15000 EAL-C EAL-R Average exceedance annual loss (dollars)
- 8. Calculating costs and benefits of investing in retrofitting Benefit/Cost Ratio Calculator Benefit/cost ratio, AAL(original) and AAL(retrofitted).
- 9. Calculating costs and benefits of investing in retrofitting Benefit/cost ratio, AAL(original) and AAL(retrofitted).
- 10. Calculating costs and benefits of investing in retrofitting Benefit/cost ratio, AAL(original) and AAL(retrofitted).
- 11. Calculating costs and benefits of investing in retrofitting Seismic hazard map for 475 years
- 12. Calculating costs and benefits of investing in retrofitting Vulnerability model for structural components
- 13. Calculating costs and benefits of investing in retrofitting Vulnerability model for structural components
- 14. Calculating costs and benefits of investing in retrofitting Loss exceedance curves
- 15. Calculating costs and benefits of investing in retrofitting Optimal design map
- 16. Calculating costs and benefits of investing in retrofitting Optimal design map
- 17. Calculating costs and benefits of investing in retrofitting 2012 Mw=5.9 Emilia-Romagna earthquake 24 fatalities 400 injured 20,000 homeless $17.4B direct losses
- 18. Calculating costs and benefits of investing in retrofitting Thank you.
- 19. Except where otherwise noted, thiswork is licensed under: creativecommons.org/licenses/by-nc-nd/4.0/ Please attribute to the GEM Foundation with a link to - www.globalearthquakemodel.org