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Research papers, University of Canterbury Library

On Tuesday 22 February 2011, a 6.3 magnitude earthquake struck Christchurch, New Zealand’s second largest city. The ‘earthquake’ was in fact an aftershock to an earlier 7.1 magnitude earthquake that had occurred on Saturday 4 September 2010. There were a number of key differences between the two events that meant they had dramatically different results for Christchurch and its inhabitants. The 22 February 2011 event resulted in one of New Zealand’s worst natural disasters on record, with 185 fatalities occurring and hundreds more being injured. In addition, a large number of buildings either collapsed or were damaged to the point where they needed to be totally demolished. Since the initial earthquake in September 2010, a large amount of building-related research has been initiated in New Zealand to investigate the impact of the series of seismic events – the major focus of these research projects has been on seismic, structural and geotechnical engineering matters. One project, however, conducted jointly by the University of Canterbury, the Fire Protection Association of New Zealand and BRANZ, has focused on the performance of fire protection systems in the earthquakes and the effectiveness of the systems in the event of post-earthquake fires occurring. Fortunately, very few fires actually broke out following the series of earthquake events in Christchurch, but fire after earthquakes still has significant implications for the built environment in New Zealand, and the collaborative research has provided some invaluable insight into the potential threat posed by post-earthquake fires in buildings. As well as summarising the damage caused to fire protection systems, this paper discusses the flow-on effect for designing structures to withstand post-earthquake fires. One of the underlying issues that will be explored is the existing regulatory framework in New Zealand whereby structural earthquake design and structural design for fire are treated as discrete design scenarios.

Videos, UC QuakeStudies

A video of an interview with Andreas Duenser, research scientist at the Human Interface Technology Laboratory, about an earthquake simulator at the University of Canterbury. The simulator was developed to help treat people suffering from post-traumatic stress disorder after the 2010 and 2011 Canterbury earthquakes. It allows people to relive their earthquake experiences in a safe environment to help them overcome their ordeals.

Videos, UC QuakeStudies

A video of an interview with Andrew Wheely about the Whare store which has been operating from a garage since the 22 February 2011 earthquake. Wheely talks about how small businesses need flexible commercial leases to survive in the post-earthquake market. He also talks about the diploma in project management he has undertaken at the CPIT since the earthquakes.

Videos, UC QuakeStudies

An video recording of Rev Darryl Tempero's interview for the Church in the Quakes Project. The interview was conducted by Melissa Parsons on 3 October 2012. At the time, Darryl Tempero was a Minister at Hope Presbyterian Hornby, the Presbyterian Earthquake Coordinator, and the Co-Chair of Christchurch Post Earthquake Churches' Forum.

Audio, UC QuakeStudies

An audio recording of Rev Darryl Tempero's interview for the Church in the Quakes Project. The interview was conducted by Melissa Parsons on 3 October 2012. At the time, Darryl Tempero was a Minister at Hope Presbyterian Hornby, the Presbyterian Earthquake Coordinator, and the Co-Chair of Christchurch Post Earthquake Churches' Forum.

Audio, Radio New Zealand

Ongoing post-earthquake stresses are having an effect on Cantabrians, resulting in increased demand for anger management counselling. We hear from Jo Westbury, clinical director of Stopping Violence Services, and Struan Duthie, director of Petersgate Counselling.

Videos, UC QuakeStudies

A video of an interview with Joe Bennett, columnist and Lyttelton resident, about his experiences during the 22 February 2011 earthquake, and his hopes for post-quake Christchurch. This video was part of The Press's 'Christchurch, one year after February 22, 2011' series.

Images, UC QuakeStudies

HITLab NZ's Andreas Dunser and UC clinical psychologists Dr Janet Carter, Dr Eileen Britt and Associate Professor Martin Dorahy, who are creating an earthquake simulator at the University of Canterbury to investigate ways to help Cantabrians overcome post-traumatic stress disorders caused by ongoing seismic activity.

Images, UC QuakeStudies

HITLab NZ's Andreas Dunser and UC clinical psychologists Dr Janet Carter, Dr Eileen Britt and Associate Professor Martin Dorahy, who are creating an earthquake simulator at the University of Canterbury to investigate ways to help Cantabrians overcome post-traumatic stress disorders caused by ongoing seismic activity.

Research Papers, Lincoln University

Lincoln University and CBRE, a commercial real estate service provider, have conducted research to investigate the impacts of the Canterbury earthquake on the commercial office market in Christchurch. The 22 February 2011 Canterbury earthquake had a devastating impact on Christchurch property with significant damage caused to land and buildings. As at January 2012, around 740 buildings have either been demolished or identified to be demolished in central Christchurch. On top of this, around 140 buildings have either been partially demolished or identified to be partially demolished. The broad aims of our research are to (i) examine the nature and extent of the CBD office relocation, (ii) identify the nature of the occupiers, (iii) determine occupier’s perceptions of the future: their location and space needs post the February earthquake, and the likelihood of relocating back to the CBD after the rebuild, and (iv) find out what occupiers see as the future of the CBD, and how they want this to look.

Research papers, University of Canterbury Library

The Canterbury earthquake sequence in New Zealand’s South Island induced widespread liquefaction phenomena across the Christchurch urban area on four occasions (4 Sept 2010; 22 Feb; 13 June; 23 Dec 2011), that resulted in widespread ejection of silt and fine sand. This impacted transport networks as well as infiltrated and contaminated the damaged storm water system, making rapid clean-up an immediate post-earthquake priority. In some places the ejecta was contaminated by raw sewage and was readily remobilised in dry windy conditions, creating a long-term health risk to the population. Thousands of residential properties were inundated with liquefaction ejecta, however residents typically lacked the capacity (time or resources) to clean-up without external assistance. The liquefaction silt clean-up response was co-ordinated by the Christchurch City Council and executed by a network of contractors and volunteer groups, including the ‘Farmy-Army’ and the ‘Student-Army’. The duration of clean-up time of residential properties and the road network was approximately 2 months for each of the 3 main liquefaction inducing earthquakes; despite each event producing different volumes of ejecta. Preliminary cost estimates indicate total clean-up costs will be over NZ$25 million. Over 500,000 tonnes of ejecta has been stockpiled at Burwood landfill since the beginning of the Canterbury earthquakes sequence. The liquefaction clean-up experience in Christchurch following the 2010-2011 earthquake sequence has emerged as a valuable case study to support further analysis and research on the coordination, management and costs of large volume deposition of fine grained sediment in urban areas.

Videos, UC QuakeStudies

A video about the reopening of C1 Espresso in the former post office on the corner of Tuam and High Streets. The café had to close after the 22 February 2011 earthquake, which severely damaged their building on High Street. The video includes footage of the staff setting up the cafe and an interview with owner Sam Crofskey.

Research papers, University of Canterbury Library

The magnitude Mw 6.2 earthquake of February 22nd 2011 that struck beneath the city of Christchurch, New Zealand, caused widespread damage and was particularly destructive to the Central Business District (CBD). The shaking caused major damage, including collapses of structures, and initiated ground failure in the form of soil liquefaction and consequent effects such as sand boils, surface flooding, large differential settlements of buildings and lateral spreading of ground towards rivers were observed. A research project underway at the University of Canterbury to characterise the engineering behaviour of the soils in the region was influenced by this event to focus on the performance of the highly variable ground conditions in the CBD. This paper outlines the methodology of this research to characterise the key soil horizons that underlie the CBD that influenced the performance of important structures during the recent earthquakes, and will influence the performance of the rebuilt city centre under future events. The methodology follows post-earthquake reconnaissance in the central city, a desk study on ground conditions, site selection, mobilisation of a post-earthquake ground investigation incorporating the cone penetration test (CPT), borehole drilling, shear wave velocity profiling and Gel-push sampling followed by a programme of laboratory testing including monotonic and cyclic testing of the soils obtained in the investigation. The research is timely and aims to inform the impending rebuild, with appropriate information on the soils response to dynamic loading, and the influence this has on the performance of structures with various foundation forms.

Images, eqnz.chch.2010

20120321_2397_1D3-47 Beachcomber Dairy Corner of New Brighton Road and Rawson Street, New Brighton. This diary is inside the suburban red zone and will probably be demolished some time in the future. See how the earthquakes have moved the footpath - the post and phone box used to stand straight! This is one of the Teleccom Wi-Fi hotspot boo...

Research papers, University of Canterbury Library

The Mw 7.1 Darfield earthquake generated a ~30 km long surface rupture on the Greendale Fault and significant surface deformation related to related blind faults on a previously unrecognized fault system beneath the Canterbury Plains. This earthquake provided the opportunity for research into the patterns and mechanisms of co-seismic and post-seismic crustal deformation. In this thesis I use multiple across-fault EDM surveys, logic trees, surface investigations and deformation feature mapping, seismic reflection surveying, and survey mark (cadastral) re-occupation using GPS to quantify surface displacements at a variety of temporal and spatial scales. My field mapping investigations identified shaking and crustal displacement-induced surface deformation features south and southwest of Christchurch and in the vicinity of the projected surface traces of the Hororata Blind and Charing Cross Faults. The data are consistent with the high peak ground accelerations and broad surface warping due to underlying reverse faulting on the Hororata Blind Fault and Charing Cross Fault. I measured varying amounts of post-seismic displacement at four of five locations that crossed the Greendale Fault. None of the data showed evidence for localized dextral creep on the Greendale Fault surface trace, consistent with other studies showing only minimal regional post-seismic deformation. Instead, the post-seismic deformation field suggests an apparent westward translation of northern parts of the across-fault surveys relative to the southern parts of the surveys that I attribute to post-mainshock creep on blind thrusts and/or other unidentified structures. The seismic surveys identified a deformation zone in the gravels that we attribute to the Hororata Blind Fault but the Charing Cross fault was not able to be identified on the survey. Cadastral re-surveys indicate a deformation field consistent with previously published geodetic data. We use this deformation with regional strain rates to estimate earthquake recurrence intervals of ~7000 to > 14,000 yrs on the Hororata Blind and Charing Cross Faults.

Videos, UC QuakeStudies

A video of an interview with Danny Lee about a show put on by the Circus Trust. The show is based on a post-disaster scenario, reflecting the situation in Christchurch. Lee talks about the inspiration for the show, as well as the difficulties finding rehearsal and show venues in Christchurch after the earthquakes. The video also includes footage of the dress rehearsal for the show.

Images, Alexander Turnbull Library

Three men chat in a pub. One of them reads a newspaper article about the Mayor of Christchurch, Bob Parker, who commented that he was scared of earthquakes when in Wellington. All three drinkers would rather be in Wellington than trapped beside Bob Parker at a dinner table. Context: Christchurch's Mayor has told the Emergency Management Conference he's scared to be in Wellington. He gave graphic descriptions of the Christchurch earthquakes, getting people to bang on the tables for 45 seconds so they could see what it felt like. Quantity: 1 digital cartoon(s).