MAE Center research Success with DOTs Slide 21 Seismic - Seismic - Design - Bridge - Structures - Federal Highway Administration

U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000


Skip to content U.S. Department of Transportation/Federal Highway AdministrationU.S. Department of Transportation/Federal Highway Administration

Bridges & Structures

Seismic

MAE CENTER RESEARCH SUCCESS WITH DOTs

Return to slides

COLUMN AND BEAM WRAPPING

Effect of As-Built versus Retrofit

Schematic plot of probability of damage as a function of earthquake intensity for: minor damage; moderate damage; major damage, for both the as-built and retrofit cases. As-built shown with solid lines represent the "do nothing" solution. The dashed lines define performance in a retrofitted condition. This allows a determination to be made as to when retrofit is required as a function of the level of damage that is acceptable. Only the 2% EQ (probability of exceedance in 50 years or 2,500-year event) and 10% EQ (probability of exceedance in 50-years or 500 years event).

Probability of Damage (%)
 10% EQ2% EQ
As-built
Minor Damage5896
Moderate Damage2684
Major damage058
Retrofit
Minor Damage6298
Moderate Damage838
Major Damage025

Return to slides

Updated: 06/13/2013
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000