Calculating costs and benefits of investing in retrofitting

Vitor Silva

GEM Foundation, Pavia, Italy

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.


Scenario Risk CalculatorMagnitude: 7.0 Mw, Mean loss: 8.7 billion EUR, Standard deviation: 2.1 billion EUR


Scenario Damage CalculatorMagnitude: 7.0 Mw

Damage distribution per asset

Total damage distribution

Damage distribution per taxonomy


Scenario Damage CalculatorMagnitude: 7.0 Mw


Benefit/Cost Ratio CalculatorPre-code and retrofitted vulnerability functions.

Original vulnerability model Retrofitted vulnerability model


0

3000

6000

9000

12000

15000

EAL-C EAL-R

Aver

age

exce

edan

ce a

nnua

l los

s (do

llars

)


Benefit/Cost Ratio Calculator

Benefit/cost ratio, AAL(original) and AAL(retrofitted).


Benefit/cost ratio, AAL(original) and AAL(retrofitted).


Seismic hazard map for 475 years


Vulnerability model for structural components


Loss exceedance curves


Optimal design map


2012 Mw=5.9 Emilia-Romagna earthquake

24 fatalities400 injured20,000 homeless$17.4B direct losses


Thank you.

Except where otherwise noted, this work is licensed under: creativecommons.org/licenses/by-nc-nd/4.0/

Please attribute to the GEM Foundation with a link to -www.globalearthquakemodel.org

http://www.globalearthquakemodel.org/

Calculating costs and benefits of investing in retrofitting

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