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SURVEY OF DAMAGE EXTENT AND SEVERITY OF CHRISTCHURCH EARTHQUAKES FOR REGIONAL RISK ASSESSMENT (2012)

After the two recent earthquakes in Christchurch (September 2010 and 
February 2011) a team of researchers organized by the Earthquake Engineering Research Institute (EERI) was dispatched to the area to conduct a damage survey. The survey addressed a variety of interests including structural and geotechnical engineering, emergency management, disaster recovery and socio-economic impacts. The authors focused on identifying the spread and severity of damage by sampling areas in order to capture the overall performance of buildings and to estimate economic and insured losses. Several locations close to seismic recording stations were visited and information about building attributes and the state of structural and non-structural damage for about 200 buildings, mostly typical non-engineered dwellings and a few engineered structures, were collected. This paper presents some statistics of the observed damage for typical  residential dwellings around Christchurch. Results from this study suggest a low level of shaking-induced damage for wood structures during these earthquakes.
Reference:
NZSEE Annual Technical Conference & AGM, 13-15 April 2012, Christchurch
Organization:
AIR Worldwide Corporation, Boston, MA, USA
USA
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