L'Aquila Earthquake of April 6, 2009 in Italy: Rebuilding a Resilient City to Withstand Multiple Hazards

A multidisciplinary team of investigators from the Multidisciplinary Center for Earthquake Engineering Research (MCEER) together with a team from the Politecnico di Torino in Italy, conducted post-disaster field reconnaissance to examine the impact of the April 6, 2009 L’Aquila, Italy earthquake on physical engineered systems and the response and recovery efforts that followed. By collecting information, the authors are seeking to develop engineering design strategies and organizational strategies that will make the L’Aquila community more resilient against future earthquakes and any extreme event in general. The report was initiated to present the findings from the field reconnaissance mission, but the topic addressed includes advance damage identification using remote sensing, damage to engineered and historical structures, and organizational decision making primarily in hospitals

L'Aquila Earthquake of April 6, 2009 in Italy: Rebuilding a Resilient City to Withstand Multiple Hazards

A multidisciplinary team of investigators from the Multidisciplinary Center for Earthquake Engineering Research (MCEER) together with a team from the Politecnico di Torino in Italy, conducted post-disaster field reconnaissance to examine the impact of the April 6, 2009 L'Aquila, Italy earthquake on physical engineered systems and the response and recovery efforts that followed. By collecting information, the authors are seeking to develop engineering design strategies and organizational strategies that will make the L'Aquila community more resilient against future earthquakes and any extreme event in general. The report was initiated to present the findings from the field reconnaissance mission, but the topic addressed includes advance damage identification using remote sensing, damage to engineered and historical structures, and organizational decision making primarily in hospital

Laminar box system for 1-g physical modeling of liquefaction and lateral spreading

Details of a large scale modular 1-g laminar box system capable of simulating seismic induced liquefaction and lateral spreading response of level or gently sloping loose deposits of up to 6 m depth are presented. The internal dimensions of the largest module are 5 m in length and 2.75 m in width. The system includes a two dimensional laminar box made of 24 laminates stacked on top of each other supported by ball bearings, a base shaker resting on a strong floor, two computer controlled high speed actuators mounted on a strong wall, a dense array advanced instrumentation, and a novel system for laboratory hydraulic placement of loose sand deposit, which mimics underwater deposition in a narrow density range. The stacks of laminates slide on each other using a low-friction high-load capacity ball bearing system placed between each laminate. It could also be reconfigured into two smaller modules that are 2.5 m wide, 2.75 m long, and up to 3 m high. The maximum shear strain achievable in this system is 15 %. A limited set of instrumentation data is presented to highlight the capabilities of this equipment system. The reliability of the dense array sensor data is illustrated using cross comparison of accelerations and displacements measured by different types of sensors. Copyright © 2009 by ASTM International