Abstract The recent update to the National Seismic Hazard Model has changed the approach to seismic site classification in New Zealand, with the time-averaged shear wave velocity over the top 30 m of the subsurface profile (VS30) at a site now being a key site…
The sequence of strong earthquakes in Canterbury in 2010 to 2011, most notably the devastating Mw 6.2 earthquake on 22 February 2011, the source of which was located within Christchurch, resulted in 185 fatalities and extensive damage to buildings and infrastructure. Liquefaction occurred on several occasions through the…
The Earthquake Commission (EQC) has, for a long time, been an important investor in high quality research in New Zealand. EQC’s research programme spans science, engineering and social science and has played a vital role in supporting New Zealand’s improved resilience to natural hazards. Through…
Abstract There are few practical methods currently available for liquefaction mitigation beneath existing structures, despite a growing demand for this due to a significant number of structures being targeted for seismic upgrading. One such method that is viable for liquefaction mitigation beneath existing structures is…
The potential for systematic variations in SPT N –values between mud rotary and sonic drilling methods has been the focus of a pilot investigation at a site that exhibited extensive liquefaction during the 22 February 2011 M 6.3 Christchurch Earthquake. In an attempt to quantify…
