A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Performance of bridges with seismic isolation bearings during the Maule earthquake, Chile
Abstract On February 27, 2010 an earthquake of magnitude M w=8.8, with epicenter in Cobquecura, Maule region, hit the central part of Chile. After the earthquake, a tsunami occurred that caused heavy casualties and damage to buildings and infrastructure. In particular, 4.5% of the overpasses located in the affected region suffered some type of damage and 25 bridges and several pedestrian bridges collapsed. At that time, there were about a dozen bridges with seismic isolation bearings in Chile, two of which were instrumented with accelerometer networks: the Marga Marga Bridge, located in Viña del Mar, and an elevated section of the Metro Line 5 in Santiago, at approximately 300km and 400km from the epicenter, respectively. This paper analyzes the acceleration records obtained at these instrumented structures and studies the effect of the seismic isolation on their dynamic response. The beneficial effect of the isolation system, especially in the longitudinal direction, is apparent. In addition, some flaws in the collapsed bridges are described.
Highlights ► Behavior of Chilean bridges during the 2010 M=8.8 earthquake is presented. ► Two instrumented bridges that are seismically isolated are analyzed in detail. ► Results of analytical models are compared with actual records. ► Important reductions in the response due to the isolation systems were observed.
Performance of bridges with seismic isolation bearings during the Maule earthquake, Chile
Abstract On February 27, 2010 an earthquake of magnitude M w=8.8, with epicenter in Cobquecura, Maule region, hit the central part of Chile. After the earthquake, a tsunami occurred that caused heavy casualties and damage to buildings and infrastructure. In particular, 4.5% of the overpasses located in the affected region suffered some type of damage and 25 bridges and several pedestrian bridges collapsed. At that time, there were about a dozen bridges with seismic isolation bearings in Chile, two of which were instrumented with accelerometer networks: the Marga Marga Bridge, located in Viña del Mar, and an elevated section of the Metro Line 5 in Santiago, at approximately 300km and 400km from the epicenter, respectively. This paper analyzes the acceleration records obtained at these instrumented structures and studies the effect of the seismic isolation on their dynamic response. The beneficial effect of the isolation system, especially in the longitudinal direction, is apparent. In addition, some flaws in the collapsed bridges are described.
Highlights ► Behavior of Chilean bridges during the 2010 M=8.8 earthquake is presented. ► Two instrumented bridges that are seismically isolated are analyzed in detail. ► Results of analytical models are compared with actual records. ► Important reductions in the response due to the isolation systems were observed.
Performance of bridges with seismic isolation bearings during the Maule earthquake, Chile
Sarrazin, Mauricio (author) / Moroni, Ofelia (author) / Neira, Carlos (author) / Venegas, Braian (author)
Soil Dynamics and Earthquake Engineering ; 47 ; 117-131
2012-06-23
15 pages
Article (Journal)
Electronic Resource
English
Performance of bridges with seismic isolation bearings during the Maule earthquake, Chile
| Online Contents | 2013
Damage of Bridges due to the 2010 Maule, Chile, Earthquake
| Taylor & Francis Verlag | 2011
Damage of Bridges due to the 2010 Maule, Chile, Earthquake
| Online Contents | 2011
Performance of reinforced concrete buildings during the 27 February 2010 Maule (Chile) earthquake
| British Library Online Contents | 2013
Seismic performance of bridges with isolation bearings
| British Library Conference Proceedings | 2007