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Images, eqnz.chch.2010

Probing for water leaks File Ref: CCL-2011-03-17-St Albans-IMG_0391 From the collection of Christchurch City Libraries.

Research papers, University of Canterbury Library

Extended Direct Analysis (EDA), developed at the University of Canterbury, is an advance on the AISC Direct Analysis method for the analysis of frames subjected to static forces. EDA provides a faster, simple and more rational way to properly consider the second-order effects, initial residual stresses (IRS) and the initial imperfections or steel structures under one directional loading than conventional analysis methods. This research applied the EDA method to quantify the effect of member overstrength on frame behaviour for a single storey frame. Also, the effects of IRS, which were included in the EDA static analysis, but which are not considered explicitly in non-linear seismic analysis, were evaluated in two ways. Firstly, they were considered for simple structures subject to increasing cyclic displacement in different directions. Secondly, incremental dynamic analysis with realistic ground motion was used to quantify the likely effect of IRS in earthquakes. It was found that, contrary to traditional wisdom and practice, greater member strengths can result in lower frame strengths for frames under monotonic lateral loading. The structural lateral capacity of the overstrength case was reduced by 6% compared to the case using the dependable member strengths. Also, it resulted significantly different in member demands. Therefore, it is recommended that when either plastic analysis or EDA is used, that both upper and lower bounds on the likely member strength should be considered to determine the total frame strength and the member demands. Results of push-pull analysis under displacement control showed that for IRS ratio, gamma < 0.5 and axial compressive force ratio, N*/Ns, up to 0.5, IRS did affect the structural behaviour in the first half cycle. However, the behavior in the later cycles was not significantly affected. It also showed that the effect of initial residual stresses in the frame was less significant than for the column alone when the column was subjected to similar axial compressive force. The incremental dynamic analysis results from both cantilever column and the three-storey steel frame showed that by increasing gamma = 0 to 0.5, the effect of IRS on seismic responses, based on the 50% confidence level, was less than 3% for N*/Ns, up to 0.5.

Images, Alexander Turnbull Library

Christchurch City has to be rebuilt after the earthquakes of 4 September 2010 and 22 February 2011. People are being invited to contribute ideas about how to rebuild on a city council website. A group of people look at ideas on computers; a boy comments that 'this one looks just like the old city' and his father comments 'but built fifty miles up the road!' A woman looks at what appears to be pre European Maori pa site and says 'Hone Harawira wants something pre-European!' Another woman looks at a map of the middle of the South Island and says 'Rodney Hide doesn't care as long as Christchurch combines with Timaru and Westport!' Context - Former ACT leader Rodney Hide in his role as Minister for Local Government likes 'supercities' and Hone Harawira has left the Maori Party, fed up with the compromises he believes they have to make to suit their coalition agreement with the National government. He seems to prefer a city that will reflect simpler pre-European times. Colour and black and white versions available Quantity: 2 digital cartoon(s).

Images, UC QuakeStudies

Photograph captioned by the New Zealand Defence Force, "The NZ Defence Force helps out after the 22 February 2011 earthquake. Army and Air Force Medics as well as Hercules crew and Air Security transfer elderly patients from NZDF ambulances to the Air Force's C-130 Hercules for transport to other parts of NZ. CPL Miller cares for the elderly patients".

Images, UC QuakeStudies

Photograph captioned by the New Zealand Defence Force, "The NZ Defence Force helps out after the 22 February 2011 earthquake. Army and Air Force Medics as well as Hercules crew and Air Security transfer elderly patients from NZDF ambulances to the Air Force's C-130 Hercules for transport to other parts of NZ. SGT Simon Blakeway prepares for a briefing".

Images, UC QuakeStudies

Photograph captioned by the New Zealand Defence Force, "The NZ Defence Force helps out after the 22 February 2011 earthquake. Army and Air Force Medics as well as Hercules crew and Air Security transfer elderly patients from NZDF ambulances to the Air Force's C-130 Hercules for transport to other parts of NZ. SQNLDR Jude Telford prepares a patient for transfer".

Images, UC QuakeStudies

Photograph captioned by the New Zealand Defence Force, "The NZ Defence Force helps out after the 22 February 2011 earthquake. Army and Air Force Medics as well as Hercules crew and Air Security transfer elderly patients from NZDF ambulances to the Air Force's C-130 Hercules for transport to other parts of NZ. SQNLDR Jude Telford prepares a patient for transfer".

Images, UC QuakeStudies

Photograph captioned by the New Zealand Defence Force, "The NZ Defence Force helps out after the 22 February 2011 earthquake. Army and Air Force Medics as well as Hercules crew and Air Security transfer elderly patients from NZDF ambulances to the Air Force's C-130 Hercules for transport to other parts of NZ. LAC Russell Cowling prepares an elderly patient for transfer".

Images, UC QuakeStudies

Prime Minister John Key preparing for a photograph with Al Dwyer, leader of the Disaster Assistance Response Team (DART), and members of DART, outside the US headquarters in Latimer Square. Latimer Square was set up as a temporary headquarters for emergency managements personnel after the 22 February 2011 earthquake.

Images, UC QuakeStudies

Prime Minister John Key preparing for a photograph with Al Dwyer, leader of the Disaster Assistance Response Team (DART), and members of DART, outside the US headquarters in Latimer Square. Latimer Square was set up as a temporary headquarters for emergency managements personnel after the 22 February 2011 earthquake.

Images, Alexander Turnbull Library

The title is 'Gerry BrownLie?' and the cartoon shows the Minister for Earthquake recovery, Gerry Brownlee, saying 'I promise not to promise again'. The words 'Red Zone' appear beneath with the word 'faced' inserted between them. Context: The 'Red Zone' is the earthquake area in which houses cannot be rebuilt. Earthquake Minister Gerry Brownlee has apologised for falsely promising red zone homeowners they would be paid out for improvements to their house. Brownlee promised in June that, in some cases, home improvements like new kitchens would be included in the government settlement offer for red zone houses. But the offer is only valid if the improvement has added to the footprint of the house. (Press - 4 September 2011) Alternate version of DCDL-0018757 Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

The cartoon shows the Minister for Earthquake Recovery, Gerry Brownlee, who wears a jacket with 'CERA' printed on it, reading from the 'Doomsday Book'. He reads 'The following suburbs and my hopes of a reputation as an effective minister, are now officially listed as munted...' Context - On 23rd June Prime Minister, John Key, officially announced which streets and suburbs in earthquake-ravaged Christchurch would be abandoned. For many residents, there has been too much delay and too little information regarding progress towards resolving questions about which land can or cannot be used for rebuilding for Gerry Brownlee's reputation to remain unsullied. Quantity: 1 digital cartoon(s).