Ground Motions versus Geotechnical and Structural Damage in the February 2011 Christchurch Earthquake

摘要: The Mw = 6.3 earthquake of February 22 was the strongest seismic event in a series damaging aftershocks and around Christchurch after Darfield on 4 September 2010. source sparsely populated area thus it caused no loss life. Serious damage mainly due to extensive liquefaction. By contrast, generated fault close proximity city, resulting death toll 181 people. The Canterbury Plains are covered with river gravels that hide any evidence past activity this region. newly revealed Greendale therefore completely unknown. Only portion ground surface during earthquake. second (the one ruptured 2011) appears be continuation first, although structure directly connecting faults has been recognized. There is debate among seismologists at point whether different from or not (NHRP 2011a; NHRP 2011b; Geonet 2011). Due its magnitude, shallow depth proved particularly destructive for central business district (CBD) Christchurch, where buildings suffered damage. Thanks dense network strong motion stations, large number records have obtained, which provide valuable information offer possibility relating extent actual measurements shaking. Apart southern part city hills Lyttelton port area, built deep estuarine soil, shaped last thousands years by ever-changing riverbed. Fine sands—the dominant soil type—and …