Padgett, Jamie E.
Ghosh, Jayadipta, Padgett, Jamie E. and Sánchez-Silva, Mauricio. "Seismic Damage Accumulation of Highway Bridges in Earthquake Prone Regions." (2013) Earthquake Engineering Research Institute: http://dx.doi.org/10.1193/120812EQS347M.
Civil infrastructures, such as highway bridges, located in seismically active
regions are often subjected to multiple earthquakes, such as multiple main shocks
along their service life or main shock-aftershock sequences. Repeated seismic events
result in reduced structural capacity and may lead to bridge collapse causing
disruption in normal functioning of transportation networks. This study proposes a
framework to predict damage accumulation in structures under multiple shock
scenarios after developing damage index prediction models and accounting for the
probabilistic nature of the hazard. The versatility of the proposed framework is
demonstrated on a case study highway bridge located in California for two distinct
hazard scenarios: a) multiple main shocks along the service life, and b) multiple
aftershock earthquake occurrences following a single main shock. Results reveal that
in both cases there is a significant increase in damage index exceedance probabilities
due to repeated shocks within the time window of interest.
Earthquake Engineering Research Institute
Seismic Damage Accumulation of Highway Bridges in Earthquake Prone Regions
National Science Foundation
CMMI- 1055301 (National Science Foundation)