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Audio, Radio New Zealand

Moves towards returning the famed rose window to Christ Church Cathedral begin today. An eighteen-tonne steel frame is being installed onto the cathedral's west facade as part of restoration work. It will eventually housing the rose window. The cathedral was critically damaged in the Christchurch earthquake of 2011. Project director Keith Paterson is in Cathedral Square. He speaks to Susie Ferguson.

Images, UC QuakeStudies

Two images of a house, taken before and after the earthquakes. In the after photograph the chimneys are gone, a column supporting the car port has partly collapsed, windows are broken, and the previously neat lawn and driveway are overgrown. The photographer comments, "This was a house that I was selling up to the September 2010 earthquake in Christchurch. It was on Avonside Drive, which was an area that has been badly hit in every earthquake that has hit the area. In the September quake parts of the house moved in different directions and one of the upstairs doors had to be smashed open to release one of the sons from his bedroom. This occurred in the dark with numerous aftershocks shaking the house. Liquefaction poured up through the floor and flowed down the drive. Everyone got out OK, but soon after the house was red stickered meaning it was dangerous to enter. The house was looted many times even though there was constant police patrols. When the most violent earthquake occurred on 22 February 2012 both the tall heavy chimneys came crashing through into the living areas. Subsequent earthquakes and aftershocks have caused one of the brick fence pillars to fall and the front garage pillar to break up and twist. The family's troubles did not end there. They moved into the home of one of their parents and this mansion of a home was so badly affected by the February earthquake that no one could enter to collect any of their or their parents' belongings. They now own a new home, which they are fond of except when the ground shakes yet again. There has been to date 10,712 earthquakes and aftershocks since 4 September 2010".

Videos, UC QuakeStudies

A video of an interview with Kristal and Justin Thompson, about their house on Carrick Street which was damaged by the floods. Justin talks about how the 2010 and 2011 earthquakes has caused their land to drop. Kristal also talks about their insurance scheme.

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Aftermath of the earthquake in Christchurch where the cleanup has begun. Many of the residents of Seabreeze Close and neighbouring streets are packing up because of severe damage. Shelly Sutherland, left, helps Kerry Donald clear his belongings from his house in Seabreeze Close".

Images, eqnz.chch.2010

The area beside the lower Avon River in New Brighton of Evans Avenue and Admirals Way has been cleared of houses and boundary fences (there were between 15 and 20 houses on this block) , fully fenced with post and wire and "spray on" grass applied. These were all red zone properties acquired by the crown after the land was deemed too damaged t...

Images, Alexander Turnbull Library

A small house is shown on an enormous foundation block labelled 'Rate$'. The cartoonist's comment is 'Like for like for the house...Total dislike for the foundation!' In Christchurch there were prospects of large rises in householders' rate to help finance the Christchurch Rebuild project. In view of the damage to housing, rate increases may be badly disproportionate. Quantity: 1 digital cartoon(s).

Images, eqnz.chch.2010

Another house has gone from Seabreeze Close, Pacific Park, Bexley, leaving just the concrete base, a few floor tiles and the smashed toilet (throne). Houses are being demolished (85%) or deconstructed/shifted (15%) as a result of land damage in the major earthquakes of 4th September 2010, 22nd February 2011, 13th June 2011 and 23rd December 2...

Research papers, University of Canterbury Library

New Zealand has a long tradition of using light timber frame for construction of its domestic dwellings. After the most recent earthquakes (e.g. Canterbury earthquakes sequence), wooden residential houses showed satisfactory life safety performance which aligns with New Zealand design codes requirements. However, poor performance was reported in terms of their seismic resilience that can be generally associated with community demands. Future expectations of the seismic performance of wooden-framed houses by homeowners were assessed in this research. Homeowners in the Wellington region were asked in a survey about the levels of safety and expected possible damage in their houses after a seismic event. Findings bring questions about whether New Zealand code requirements are good enough to satisfy community demands. Also, questions whether available information of strengthening techniques to structurally prepare wooden-framed houses to face future major earthquakes can help to make homeowners feel safer at home during major seismic events.

Audio, Radio New Zealand

More than 600 Christchurch home-owners face a wait of up to 18 months before its decided who foots the bill for earthquake repairs that could cost hundreds of millions of dollars. The problem - first revealed on Checkpoint in March - is that owners bought homes thinking all quake damage had been identified and fixed - only to find more problems that weren't addressed. The people affected cannot claim on their insurance - because the damage pre-dates them buying the house - and any grant from the Earthquake Commission is capped. EQC has publicly apologised to those affected but the Minster, Megan Woods, says it's unclear who will pay for the needed repairs.

Images, UC QuakeStudies

A broken concrete floor slab in a residential property. The photographer comments, "Now that our house is to be rebuilt some time in the distant future, I decided to relay the loose and broken tiles. I took some photos to show what lies beneath".

Research papers, University of Canterbury Library

On 4 September 2010, a magnitude Mw 7.1 earthquake struck the Canterbury region on the South Island of New Zealand. The epicentre of the earthquake was located in the Darfield area about 40 km west of the city of Christchurch. Extensive damage occurred to unreinforced masonry buildings throughout the region during the mainshock and subsequent large aftershocks. Particularly extensive damage was inflicted to lifelines and residential houses due to widespread liquefaction and lateral spreading in areas close to major streams, rivers and wetlands throughout Christchurch and Kaiapoi. Despite the severe damage to infrastructure and residential houses, fortunately, no deaths occurred and only two injuries were reported in this earthquake. From an engineering viewpoint, one may argue that the most significant aspects of the 2010 Darfield Earthquake were geotechnical in nature, with liquefaction and lateral spreading being the principal culprits for the inflicted damage. Following the earthquake, a geotechnical reconnaissance was conducted over a period of six days (10–15 September 2010) by a team of geotechnical/earthquake engineers and geologists from New Zealand and USA (GEER team: Geo-engineering Extreme Event Reconnaissance). JGS (Japanese Geotechnical Society) members from Japan also participated in the reconnaissance team from 13 to 15 September 2010. The NZ, GEER and JGS members worked as one team and shared resources, information and logistics in order to conduct thorough and most efficient reconnaissance covering a large area over a very limited time period. This report summarises the key evidence and findings from the reconnaissance.

Audio, Radio New Zealand

Over the summer on The Weekend we've been talking to recyclers and upcyclers, people who like the Wombles, are making good use of the things that they find, things that the everyday folks leave behind. This is true of Christchurch builder, artist and furniture maker, Tim McGurk. He says he works with whatever junk and materials he can find. Tim crafted several items from the materials salvaged from an earthquake damaged Christchurch house, as part of the Whole House Reuse project. He also made the news when he made a Star Wars inspired X-wing sculpture/lamp out of salvaged rimu.

Images, eqnz.chch.2010

one of Christchurch's abandoned suburbs. The land moved - bricks and block walls everywhere collapsed - two multi story buildings folded - 184 people died. Wooden framed houses largely stayed up, many concrete slabs cracked, power poles leaned in liquid ground, surface bubbled, services ruptured .... damage to the cbd still gets the most cover...

Images, UC QuakeStudies

A brick wall has fallen from this house, exposing the rooms within and leaving a pile of rubble in front. The ceiling has slumped and is held up with jacks. The photographer comments, "This was probably the result of the shallower February Christchurch earthquake rather than the bigger September one".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Christchurch begins the slow recovery process after last weeks devastating 7.1 earthquake. Laura and Angus Chisholm pictured at their property off Harewood Road. Ironically their property was seriously damaged by a boy racer who careered off the road and smashed through their garden fence and hit the front of the house knocking part of it off its foundations".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Christchurch begins the slow recovery process after last weeks devastating 7.1 earthquake. Laura and Angus Chisholm pictured at their property off Harewood Road. Ironically their property was seriously damaged by a boy racer who careered off the road and smashed through their garden fence and hit the front of the house knocking part of it off its foundations".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Christchurch begins the slow recovery process after last weeks devastating 7.1 earthquake. Laura and Angus Chisholm pictured at their property off Harewood Road. Ironically their property was seriously damaged by a boy racer who careered off the road and smashed through their garden fence and hit the front of the house knocking part of it off its foundations".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Christchurch begins the slow recovery process after last weeks devastating 7.1 earthquake. Laura and Angus Chisholm pictured at their property off Harewood Road. Ironically their property was seriously damaged by a boy racer who careered off the road and smashed through their garden fence and hit the front of the house knocking part of it off its foundations".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Christchurch begins the slow recovery process after last weeks devastating 7.1 earthquake. Laura and Angus Chisholm pictured at their property off Harewood Road. Ironically their property was seriously damaged by a boy racer who careered off the road and smashed through their garden fence and hit the front of the house knocking part of it off its foundations".

Images, UC QuakeStudies

The brick facade has fallen from the former Princess Cinema in New Brighton, exposing the rooms inside, and crushing a car parked below. The photographer comments, "The front of the old Princess Cinema in New Brighton after the earthquake in Christchurch, New Zealand on 22 February. Under the pile of bricks is a luckily unoccupied blue car. The word CLEAR on the broken facade is to show that there is no one in the car. This building has now been knocked down as it was so dangerous".

Images, UC QuakeStudies

Bricks have fallen from the walls of the former Princess Cinema in New Brighton, exposing the interior. The photographer comments, "Back of the old Princess Cinema in New Brighton after the earthquake in Christchurch, New Zealand on 22 February. In this picture you can see inside the old cinema curtains. This building has now been knocked down as it was so dangerous".

Research papers, University of Canterbury Library

Light timber framed (LTF) structures provide a cost-effective and structurally efficient solution for low-rise residential buildings. This paper studies seismic performance of single-storey LTF buildings sheathed by gypsum-plasterboards (GPBs) that are a typical lining product in New Zealand houses. Compared with wood-based structural panels, GPBs tend to be more susceptible to damage when they are used in bracing walls to resist earthquake loads. This study aims to provide insights on how the bracing wall irregularity allowed by the current New Zealand standard NZS 3604 and the in-plane rigidity of ceiling diaphragms affect the overall seismic performance of these GPB-braced LTF buildings. Nonlinear time-history analyses were conducted on a series of single-storey baseline buildings with different levels of bracing wall irregularities and ceiling diaphragm rigidity. The results showed significant torsional effect caused by the eccentric bracing wall layout with semi-rigid/rigid ceiling diaphragms. On average, bracing wall drift demand caused by the extreme bracing wall irregularities was three times of that in the regular bracing wall layout under the rigid diaphragm assumption. This finding agreed well with the house survey after the 2011 Canterbury Earthquake in which significantly more damage was observed in the houses with irregular bracing wall layouts and relatively rigid diaphragms. Therefore, it is recommended to limit the level of bracing wall eccentricity and ensure the sufficiently rigid diaphragms to avoid excessive damage in these LTF buildings in future events.