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Images, UC QuakeStudies

A house undergoing renovations has exposed building frames and structures. Aprons hanging from the fence depict the Cathedral drawn in the style of the Edmonds Baking Powder logo, with the slogan "Christchurch, sure to rise".

Images, UC QuakeStudies

A house undergoing renovations has exposed building frames and structures. Aprons hanging from the fence depict the Cathedral drawn in the style of the Edmonds Baking Powder logo, with the slogan "Christchurch, sure to rise".

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.

Research papers, The University of Auckland Library

The sequence of earthquakes that has greatly affected Christchurch and Canterbury since September 2010 has again demonstrated the need for seismic retrofit of heritage unreinforced masonry buildings. Commencing in April 2011, the damage to unreinforced stone masonry buildings in Christchurch was assessed and recorded with the primary objective being to document the seismic performance of these structures, recognising that they constitute an important component of New Zealand’s heritage architecture. A damage statistics database was compiled by combining the results of safety evaluation placarding and post-earthquake inspections, and it was determined that the damage observed was consistent with observations previously made on the seismic performance of stone masonry structures in large earthquakes. Details are also given on typical building characteristics and on failure modes observed. Suggestions on appropriate seismic retrofit and remediation techniques are presented, in relation also to strengthening interventions that are typical for similar unreinforced stone masonry structures in Europe.

Images, Alexander Turnbull Library

Text reads 'Could the wrecking ball be used on structures outside Christchurch?' The cartoon shows Minister for the Reconstruction of Christchurch Gerry Brownlee as the wrecking ball on a crane; he says 'let the fun begin'. To one side is a large house crowded with people which represents 'the welfare state' and is surrounded by a barrier on which are printed the words 'Fiscal emergency'. Context - Gerry Brownlee is seen by many as rather too quick to demolish heritage buildings in his rush to rebuild Christchurch. The wrecking ball idea also suggests that the National government is likely to wreck the welfare state in its efforts to sort out economic problems. Quantity: 1 digital cartoon(s).

Images, UC QuakeStudies

The damaged Knox Presbyterian Church on the corner of Victoria Street and Bealey Avenue. The brickwork in the gables of the building has crumbled onto the footpath below, exposing the wooden structure beneath and the inside of the church.

Images, UC QuakeStudies

Damage to the north-west corner of the Cathedral of the Blessed Sacrament. The upper part of the corner structure has collapsed. A statue of the Virgin Mary can be seen in a window. The photographer comments, "A bike ride around the CBD. Catholic Cathedral, Barbadoes St".

Images, UC QuakeStudies

Damage to the front of the Cathedral of the Blessed Sacrament. The upper part of the corner structures have collapsed, and the cross on the roof is on a lean. A statue of the Virgin Mary can be seen in a window. The photographer comments, "A bike ride around the CBD. Catholic Cathedral, Barbadoes St".

Images, UC QuakeStudies

A photograph of the earthquake damage to a building on Armagh Street. The walls of the building have crumbled and the bricks have spilt onto the footpath, exposing the wooden structure beneath. Police tape and road cones have been placed around the building as a cordon.

Audio, Radio New Zealand

Admiral Thad Allen was the principal federal official in charge after Hurricane Katrina battered the US Gulf Coast in 2005, killing more than 1,700 people and displacing many more. Prime Minister John Key says the structure of the Canterbury Earthquake Recovery Authority was decided upon after an examination of the way other governments responded to disasters like Hurricane Katrina.

Audio, Radio New Zealand

Admiral Thad Allen was the principal federal official in charge after Hurricane Katrina battered the US Gulf Coast in 2005, killing more than 1,700 people and displacing many more. Prime Minister John Key says the structure of the Canterbury Earthquake Recovery Authority was decided upon after an examination of the way other governments responded to disasters like Hurricane Katrina.

Images, UC QuakeStudies

A photograph of the earthquake damage to the Knox Church on the corner of Bealey Avenue and Victoria Street. The gable walls have crumbled, exposing the wooden structure inside. Wire fencing, road cones and cordon tape have been placed around the building as a cordon.

Images, UC QuakeStudies

A photograph of the earthquake damage to the back of Wharetiki on Colombo Street. The chimney of the house has pulled away from the back wall and collapsed onto the roof below. A wooden structure built up against the house has also pulled away from the wall.

Research papers, University of Canterbury Library

The NMIT Arts & Media Building is the first in a new generation of multistorey timber structures. It employs an advanced damage avoidance earthquake design that is a world first for a timber building. Aurecon structural engineers are the first to use this revolutionary Pres-Lam technology developed at the University of Canterbury. This technology marks a fundamental change in design philosophy. Conventional seismic design of multi-storey structures typically depends on member ductility and the acceptance of a certain amount of damage to beams, columns and walls. The NMIT seismic system relies on pairs of coupled LVL shear walls that incorporate high strength steel tendons post-tensioned through a central duct. The walls are centrally fixed allowing them to rock during a seismic event. A series of U-shaped steel plates placed between the walls form a coupling mechanism, and act as dissipators to absorb seismic energy. The design allows the primary structure to remain essentially undamaged while readily replaceable connections act as plastic fuses. In this era where sustainability is becoming a key focus, the extensive use of timber and engineered-wood products such as LVL make use of a natural resource all grown and manufactured within a 100km radius of Nelson. This project demonstrates that there are now cost effective, sustainable and innovative solutions for multi-story timber buildings with potential applications for building owners in seismic areas around the world.

Audio, Radio New Zealand

The Australian Rugby Union is supporting a call by its New Zealand counterpart for changes to the World Cup cost structure, Canterbury's estimated 30 billion-dollar earthquake rebuild could receive a kick-start from the giant China Development Bank, When it comes to the battlefield of illness and infections, women are far more robust than their male counterparts.

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

A photograph of the Durham Street Methodist Church on Durham Street. The church has almost completely collapsed and only a small section of the structure is still standing. Masonry and other rubble has spilled onto the footpath and street in front. To the right a plywood sign has been propped against the front fence. USAR codes have been spray-painted on the sign.