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Research papers, University of Canterbury Library

The 4th of September 2010 Mw 7.1 Darfield (Canterbury) earthquake had generated significant ground shaking within the Christchurch Central Business District (CBD). Despite the apparently significant shaking, the observed structural damage for pre-1970s reinforced concrete (RC) buildings was indeed limited and lower than what was expected for such typology of buildings. This paper explores analytically and qualitatively the different aspects of the "apparent‟ good seismic performance of the pre-1970s RC buildings in the Christchurch CBD, following the earthquake reconnaissance survey by the authors. Damage and building parameters survey result, based on a previously established inventory of building stock of these non-ductile RC buildings, is briefly reported. From an inventory of 75 buildings, one building was selected as a numerical case-study to correlate the observed damage with the non-linear analyses. The result shows that the pre-1970s RC frame buildings performed as expected given the intensity of the ground motion shaking during the Canterbury earthquake. Given the brittle nature of this type of structure, it was demonstrated that more significant structural damage and higher probability of collapse could occur when the buildings were subjected to alternative input signals with different frequency content and duration characteristics and still compatible to the seismicity hazard for Christchurch CBD.

Images, Alexander Turnbull Library

The cartoon shows a terribly disappointed rugby fan standing in the centre of a devastated Christchurch holding up a 'RWC ticket' and bleating 'BUT...' Context - The decision that there will be no Rugby World Cup games in Christchurch because of the damage caused by the earthquakes of 4 September 2010 and 22 February 2011. Colour and black and white versions of this cartoon are available Quantity: 2 digital cartoon(s).

Images, Alexander Turnbull Library

The cartoon shows a caricature of Prince William accompanied by the words 'Good Wills'. A second version has the words 'GOOD WILLiam' and the third has the words 'Good Will'. Context - Prince William visited New Zealand, and Christchurch in particular, after the earthquakes of 4 September 2010 and 22 February 2011 in Christchurch. Quantity: 3 digital cartoon(s).

Images, Alexander Turnbull Library

Caricature of Mayor Bob Parker dissolving into quakes; below the image is the name 'Christchurch' in very quavery letters. A second version shows Bob Parker without the shakes and without the name 'Christchurch'. Context - Opinion seems to be that Mayor Bob Parker has shown excellent leadership during the earthquakes and aftershocks in Christchurch. The earthquakes were on 4 September and 22 February. Two versions of this cartoon are available Quantity: 2 digital cartoon(s).

Images, Alexander Turnbull Library

'The Politician' cartoon strip. The minister is keen to push through 'unpopular money raising policies' like the 'tax on people's taxes for example'. Context - the Christchurch earthquake of 22 February 2011 has created more strain on an already straining economy and there has been discussion about various possibilities for sticking with the Government's short and long-term targets for debt reduction in spite of the enormous recovery cost for Christchurch. Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

A woman says to a builder 'Christchurch people will really appreciate your help to rebuild - What you construct looks like it's already been hit by an earthquake'. They are standing in front of a very shoddily-built cottage and the garden is festooned with litter. Context - After the Christchurch earthquakes there is a huge emphasis on fast rebuilding with the potential for below standard results.. Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

Shows an egg that represents '2012' with a chick beginning to peck its way out. In the background storms rage. Someone hopes that it will 'be softer and fuzzier than the last one!' Context: Refers to the difficulties and disasters of 2011 in New Zealand. Christchurch earthquakes and aftershocks continue with complicating rebuilding and insurance issues, the wreck of the Rena, and various weather events and political issues. Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

The cartoon suggests that the Kiwi character has too much of a 'She'll be right' attitude. Refers to a 1996 documentary called 'Earthquake!' which outlined the effects of a major earthquake on Christchurch's eastern suburbs and heritage buildings. The director Grant Dixon says lives could have been saved if officials had heeded the film's warnings. (Stuff: 11 March 2011) Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

Text above reads 'Cathedral rebuild?... The cartoon shows the Christchurch Cathedral as a bouncy cathedral full of jumping children. Context - Debate about the rebuilding of the cathedral after it was severely damaged in the Christchurch earthquakes of 2010 and 2011. There is a strong view that it needs to remain an icon at the heart of the city. It may have to be brought down completely as engineers consider the future for the iconic building. Quantity: 1 digital cartoon(s).

Images, UC QuakeStudies

One end of the Arts Centre photographed shortly after the 22 February 2011 earthquake. The gable of the building has crumbled and fallen to the ground, collapsing an awning. A large crack can be seen in the corner tower. Blue ties can be seen at the top of the tower, used to brace the structure after the 4 September 2010. This has probably limited the damage caused by the 22 February 2011 earthquake.

Images, UC QuakeStudies

The damaged Cranmer Centre on the corner of Montreal and Armagh Streets shortly after the 22 February 2011 earthquake. The east wall of the building has crumbled onto the street and a man in a hard hat and high-visibility vest is directing people around it. There is scaffolding on the south side of the building from repair works after the 4 September 2010 earthquake. The gable in the background has also collapsed.

Images, UC QuakeStudies

A view across Montreal Street to the Christchurch Art Gallery. The building was used as the headquarters for Civil Defence in the aftermath of the 22 February 2011 earthquake, and large white marquees have been set up in its forecourt to accommodate extra personnel. The site is surrounded by a safety fence. On the left is a sign advertising the "Van der Velden: Otira" exhibition, which was cut short by the earthquake.