
A photograph of cracks in the masonry of the Observatory tower at the Christchurch Arts Centre. The cracks formed as a result of the 4 September 2010 earthquake.
A photograph of cracks around a window of the Observatory tower at the Christchurch Arts Centre. The cracks formed as a result of the 4 September 2010 earthquake.
A pile of gravel and tarseal in front of a house in Richmond. The photographer comments, "River Rd repairs. We weren't living in our house, we'd moved out after the September 2010 shake".
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The current seismic design practice for reinforced concrete (RC) walls has been drawn into question following the unsatisfactory performance of several RC wall buildings during the Canterbury earthquakes. An overview of current research being undertaken at the University of Auckland into the seismic behaviour of RC walls is presented. The main objectives of this research project are to understand the observed performance of RC walls in Christchurch, quantify the seismic loads on RC walls, and developed improved design procedures for RC walls that will assist in revisions to the New Zealand Concrete Structures Standard. A database summarising the performance of RC wall buildings in the Christchurch CBD was collated to identify damage modes and case-study buildings. A detailed investigation is underway to verify the seismic performance of lightly reinforced concrete walls and initial numerical modeling and small-scale tests are presented in addition to details of planned experimental tests of RC walls. Numerical modelling is being used to understand the potential influence that interactions between walls and other structural elements have on the seismic response of buildings and the loads generated on RC walls. The results from finite element analysis of a severely damaged RC wall in Christchurch highlighted the effect that the floor diaphragms have on the distribution of shear stains in the wall.
Many large-scale earthquakes all over the world have highlighted the impact of soil liquefaction to the built environment, but the scale of liquefaction-induced damage experienced in Christchurch and surrounding areas following the 2010-2011 Canterbury earthquake sequence (CES) was unparalleled, especially in terms of impact to an urban area. The short time interval between the large earthquakes presented a very rare occasion to examine liquefaction mechanism in natural deposits. The re-liquefaction experienced by the city highlighted the high liquefaction susceptibility of soil deposits in Christchurch, and presented a very challenging problem not only to the local residents but to the geotechnical engineering profession. This paper summarises the lessons learned from CES, and the impacts of the observations made to the current practice of liquefaction assessment and mitigation.
We examined changes in psychological distress experienced by residents of Christchurch following two catastrophic earthquakes in late 2010 and early 2011, using data from the New Zealand Attitudes and Values Study (NZAVS), a national probability panel study of New Zealand adults. Analyses focused on the 267 participants (172 women, 95 men) who were living in central Christchurch in 2009 (i.e., before the Christchurch earthquakes), and who also provided complete responses to our yearly panel questionnaire conducted in late 2010 (largely between the two major earthquakes), late 2011, and late 2012. Levels of psychological distress were similar across the different regions of central Christchurch immediately following the September 2010 earthquake, and remained comparable across regions in 2011. By late 2012, however, average levels of psychological distress in the regions had diverged as a function of the amount of property damage experienced within each given region. Specifically, participants in the least damaged region (i.e., the Fendalton-Waimairi and Riccarton-Wigram wards) experienced greater drops in psychological distress than did those in the moderately damaged region (i.e., across the Spreydon-Heathcote and Hagley- Ferrymead wards). However, the level of psychological distress reported by participants in the most damaged region (i.e., across Shirley-Papanui and Burwood-Pegasus) were not significantly different to those in the least damaged region of central Christchurch. These findings suggest that different patterns of psychological recovery emerged across the different regions of Christchurch, with the moderately damaged region faring the worst, but only after the initial shock of the destruction had passed.
he strong motion station at Heathcote Valley School (HVSC) recorded unusually high peak ground accelerations (2.21g vertical and 1.41g horizontal) during the February 2011 Christchurch earthquake. Ground motions recorded at HVSC in numerous other events also exhibited consistently higher intensities compared with nearby strong motion stations. We investigated the underlying causes of such high intensity ground motions at HVSC by means of 2D dynamic finite element analyses, using recorded ground motions during the 2010-2011 Canterbury earthquake sequence. The model takes advantage of a LiDAR-based digital elevation model (DEM) to account for the surface topography, while the geometry and dynamic properties of the surficial soils are characterized by seismic cone penetration tests (sCPT) and Multi-Channel Analyses of Surface Waves (MASW). Comparisons of simulated and recorded ground motions suggests that our model performs well for distant events, while for near-field events, ground motions recorded at the adopted reference station at Lyttelton Port are not reasonable input motions for the simulation. The simulations suggest that Rayleigh waves generated at the inclined interface of the surficial colluvium and underlying volcanic rock strongly affect the ground motions recorded at HVSC, in particular, being the dominant contributor to the recorded vertical motions.
Data from the 2010-2011 Canterbury earthquake sequence (CES) provides an unprecedented opportunity to assess and advance the current state of practice for evaluating liquefaction triggering. Towards this end, select case histories from the CES are used herein to assess the predictive capabilities of three alternative CPT-based simplified liquefaction evaluation procedures: Robertson and Wride (1998); Moss et al. (2006); and Idriss and Boulanger (2008). Additionally, the Liquefaction Potential Index (LPI) framework for predicting the severity of surficial liquefaction manifestations is also used to assess the predictive capabilities of the liquefaction evaluation procedures. Although it is not without limitations, use of the LPI framework for this purpose circumvents the need for selecting “critical” layers and their representative properties for study sites, which inherently involves subjectivity and thus has been a point of contention among researchers. It was found that while all the assessed liquefaction triggering evaluation procedures performed well for the parameter ranges of the sites analyzed, the procedure proposed by Idriss and Boulanger (2008) yielded predictions that are more consistent with field observations than the other procedures. However, use of the Idriss and Boulanger (2008) procedure in conjunction with a Christchurch-specific correlation to estimate fines content showed a decreased performance relative to using a generic fines content correlation. As a result, the fines correction for the Idriss and Boulanger (2008) procedure needs further study.
Between September 4, 2010 and December 23, 2011, a series of earthquakes struck the South Island of New Zealand including the city of Christchurch producing heavy damage. During the strongest shaking, the unreinforced masonry (URM) building stock in Christchurch was subjected to seismic loading equal to approximately 150-200% of code values. Post-earthquake reconnaissance suggested numerous failures of adhesive anchors used for retrofit connection of roof and floor diaphragms to masonry walls. A team of researchers from the Universities of Auckland (NZ) and Minnesota (USA) conducted a field investigation on the performance of new adhesive anchors installed in existing masonry walls. Variables included adhesive type, anchor diameter, embedment length, anchor inclination, and masonry quality. Buildings were selected that had been slated for demolition but which featured exterior walls that had not been damaged. A summary of the deformation response measured during the field tests are presented. AM - Accepted Manuscript
8 Velsheda Street, Bexley, Christchurch, across the road from my house was demolished a week or so ago, just one of many demolitions of Red Zone properties at the moment. This house was about ten years old and suffered land damage during the 4th September 2010 and 22nd February 2011 earthquakes. The same fate awaits my house later in the year o...
One landscape colour digital photograph taken on 28 April 2012 showing a painting of a winged pig flying against a cloud. The painting was executed on a large curved concrete block of a temporary retaining wall in Cunningham Terrace, Lyttelton. The retaining walls above and below Cunningham Terrace were severely damaged by the 22 February 2011 ...
The CBD is slowly being opened up and this is the post - earthquake result of Cashel Mall. A vibrant, fresh look with high end shopping in colourful container shops. A really good step forward for the city.
The CBD is slowly being opened up and this is the post - earthquake result of Cashel Mall. A vibrant, fresh look with high end shopping in colourful container shops. A really good step forward for the city.
The CBD is slowly being opened up and this is the post - earthquake result of Cashel Mall. A vibrant, fresh look with high end shopping in colourful container shops. A really good step forward for the city.
The CBD is slowly being opened up and this is the post - earthquake result of Cashel Mall. A vibrant, fresh look with high end shopping in colourful container shops. A really good step forward for the city.
The CBD is slowly being opened up and this is the post - earthquake result of Cashel Mall. A vibrant, fresh look with high end shopping in colourful container shops. A really good step forward for the city.
The CBD is slowly being opened up and this is the post - earthquake result of Cashel Mall. A vibrant, fresh look with high end shopping in colourful container shops. A really good step forward for the city.
20130403_2908_G12-25 Cardboard Cathedral The temporary (10 years?) and cheap ($4-6 million) Anglican Cathedral being built a few hundred meters away from the old stone structure that was the centre of Christchurch. Both buildings (the original and this) have caused a lot of controversy, many wanting the old stone one to be repaired (the church ...
Sadly the Chapel has been badly damaged in the magnitude 6.3 earthquake that hit Christchurch 22 February 2011 - see photo at www.flickr.com/photos/geofftrotter/5570195671/in/photostr... The Rose Historic Chapel formerly St Mary’s Convent Chapel is the sole su...
A photograph looking north down Gayhurst Road, taken from the side of the bridge over the Avon River. Residential properties used to line the left-hand side of the road, and St Paul's church once stood on the corner. This was before the land was red-zoned as a result of the 2010 and 2011 Canterbury earthquakes. Separated cycle ways have recently been installed on both sides of the road. The photograph was modelled off an image taken by Mark Lincoln in September 2010.
A photograph looking north down Gayhurst Road, taken from the side of the bridge over the Avon River. Residential properties used to line the left-hand side of the road, and St Paul's church once stood on the corner. This was before the land was red-zoned as a result of the 2010 and 2011 Canterbury earthquakes. Separated cycle ways have recently been installed on both sides of the road. The photograph was modelled off an image taken by Mark Lincoln in September 2010.
A photograph looking north down Gayhurst Road, taken from the side of the bridge over the Avon River. Residential properties used to line the left-hand side of the road, and St Paul's church once stood on the corner. This was before the land was red-zoned as a result of the 2010 and 2011 Canterbury earthquakes. Separated cycle ways have recently been installed on both sides of the road. The photograph was modelled off an image taken by Mark Lincoln in September 2010.
The cartoon shows a flag which looks rather like that of both Australia and New Zealand but not exactly like either; the Union Jack is half out of the top left corner and there are just three of New Zealand's four red stars and three of Australia's white stars. The cartoonist's title is 'Aust NZ united in tragedy'. Context - The Queensland floods of December 2010 to January 2011. Colour and black and white versions available. Quantity: 2 digital cartoon(s).
A pdf copy of panel 5 of Guy Frederick's 'The Space Between Words' exhibition. The panel includes text from an interview with Jolene Parker about her experiences of the 2010 and 2011 Canterbury earthquake. Above this is an image of Parker sitting in the site of her grandmother's house, which was demolished after the earthquakes.
An honours-level thesis report by Shermine Kwok, an undergraduate student from the National University of Singapore. Shermine attended the University of Canterbury on an exchange in 2012. Inspired by the resilience of Christchurch and its residents, she returned to Christchurch to study the creative urban regeneration efforts since the earthquakes of 2010 - 2011.
In the aftermath of the 2010 and 2011 earthquakes, Christchurch, New Zealand is framed as a ‘transi- tional’ city, moving from its demolished past to a speculative future. The ADA Mesh Cities project asks what role media art and networks may play in the transitional city, and the practices of remembering, and reimagining space.
Martin Setchell, the organist, is shown playing a mouth organ made out of cardboard tubes. This is a comment on the controversy over the replacement of Christchurch Cathedral, which was severely damaged in the Canterbury earthquakes of 2010 and 2011, by a temporary building made out of cardboard tubing. Quantity: 1 digital cartoon(s).
At top left is text reading 'Christchurch pupils return to school...' The teacher has written the words 'Nosey', 'Bob', and 'Double' on the blackboard and says to the children 'Our first test today... Sort these into Parkers we love and Parkers we don't'... Context - the correct answers would be that we hate 'nosey parkers' and 'double parkers' but that we love 'Bob Parker'. Bob Parker is the Mayor of Christchurch and is generally considered to have done a remarkably good job of demonstrating calm and cheerfulness after the two earthquakes of 4 September 2010 and 22 February 2011, as well as having been able to chose fitting words to express grief and despair at so much loss. Quantity: 1 digital cartoon(s).
The M7.1 Darfield earthquake shook the town of Christchurch (New Zealand) in the early morning on Saturday 4th September 2010 and caused damage to a number of heritage unreinforced masonry buildings. No fatalities were reported directly linked to the earthquake, but the damage to important heritage buildings was the most extensive to have occurred since the 1931 Hawke‟s Bay earthquake. In general, the nature of damage was consistent with observations previously made on the seismic performance of unreinforced masonry buildings in large earthquakes, with aspects such as toppled chimneys and parapets, failure of gables and poorly secured face-loaded walls, and in-plane damage to masonry frames all being extensively documented. This report on the performance of the unreinforced masonry buildings in the 2010 Darfield earthquake provides details on typical building characteristics, a review of damage statistics obtained by interrogating the building assessment database that was compiled in association with post-earthquake building inspections, and a review of the characteristic failure modes that were observed.