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Images, UC QuakeStudies

A photograph of a stone in front of a tree in Hagley Park with a plaque. The plaque reads, "This stone was erected 16th Dec. 1908 by the Canterbury Old Colonists Assn to mark the spot where some of the first Canterbury settlers erected their huts 1851".

Images, UC QuakeStudies

A photograph of people drawing at a table at the Pallet Pavilion during Supernova City, a drawing workshop led by Melbourne-based New Zealand artist and architect Byron Kinnaird. This event was part of FESTA 2013, and invited people to make new, imaginative drawings of Christchurch city.

Images, UC QuakeStudies

Christchurch Mayor Bob Parker handling a jackhammer on Kingsford Street in Burwood. This was part of the opening of the Stronger Christchurch Infrastructure Rebuild Team (SCIRT). Earthquake Recovery Minister Jerry Brownlee and a contractor are looking on.

Images, UC QuakeStudies

A sign above the closed shutter of a building in Wainoni reads "Open 7 days". The photographer comments, "A Sunday afternoon ride to New Brighton, then back via Aranui, Wainoni, Dallington, and Richmond. Not a cheerful experience. Open 7 days. This Wainoni car parts shop was definitely not open today".

Images, UC QuakeStudies

A road cone on the side of Kingsford Street in the Horseshoe Lake district. The cone has been decorated to look like an angel for Christmas. The photograph has been captioned by BeckerFraserPhotos, "There is something particularly appealing about the decoration provided for this cone".

Images, UC QuakeStudies

A road cone on the side of Kingsford Street in the Horseshoe Lake district. The cone has been decorated to look like Santa Claus. The photograph has been captioned by BeckerFraserPhotos, "There is something particularly appealing about the decoration provided for this cone".

Images, UC QuakeStudies

A road cone on the side of Kingsford Street in the Horseshoe Lake district. The cone has been decorated to look like Santa Claus. The photograph has been captioned by BeckerFraserPhotos, "There is something particularly appealing about the decoration provided for this cone".

Images, UC QuakeStudies

A damaged building on Riccarton Road near Deans Avenue. The front wall of the building has crumbled onto the footpath in front. Wire fencing and road cones have been placed around the building as a cordon. Flowers on the fence suggest that somebody lost their life in this building.

Images, UC QuakeStudies

Internal damage to a house in Richmond. A large crack in the wallboard below a window has exposed the bricks, and the skirting board has moved away from the floor. The photographer comments, "Cracks in the wall of the sunroom. This is the interior view of the crack in the previous shot".

Images, UC QuakeStudies

Damage to a house in Richmond. A brick chimney has visibly twisted and there are gaps between the bricks. The photographer comments, "Damaged chimney. We'll have to get this taken down tidily, but our roofer friends are a bit busy... (It was taken down on the morning of Day 2, just as well)".

Images, UC QuakeStudies

Liquefaction around QEII stadium. The photographer comments, "A Sunday afternoon ride to New Brighton, then back via Aranui, Wainoni, Dallington, and Richmond. Not a cheerful experience. QE2 stadium. From Frosts Rd, looking along Robin Tait Drive - the stadium looks OK from this distance, though the land has sunk and become waterlogged".

Images, eqnz.chch.2010

The September Canterbury earthquake. These pictures were taken of Colombo Street in Sydenham. A lot of masonry in this area has been damaged/fallen down. Monumental masons is a gravestone maker. Note: these photos were taken on a cellphone; mind the quality.

Research papers, The University of Auckland Library

A non-destructive hardness testing method has been developed to investigate the amount of plastic strain demand in steel elements subjected to cyclic loading. The focus of this research is on application to the active links of eccentrically braced frames (EBFs), which are a commonly used seismic-resisting system in modern steel framed buildings. The 2010/2011 Christchurch earthquake series, especially the very intense February 22 shaking, which was the first earthquake worldwide to push complete EBF systems fully into their inelastic state, generating a moderate to high level of plastic strain in EBF active links, for a range of buildings from 3 to 23 storeys in height. This raised two important questions: 1) what was the extent of plastic deformation in active links; and 2) what effect does that have to post-earthquake steel properties? This project comprised determining a robust relationship between hardness and plastic strain in order to be able to answer the first question and provide the necessary input into answering the second question. A non-destructive Leeb (portable) hardness tester (model TH170) has been used to measure the hardness, in order to determine the plastic strain, in hot rolled steel universal sections and steel plates. A bench top Rockwell B was used to compare and validated the hardness measured by the portable hardness tester. Hardness was measured from monotonically strained tensile test specimens to identify the relationship between hardness and plastic strain demand. Test results confirmed a good relationship between hardness and the amount of monotonically induced plastic strain. Surface roughness was identified as an important parameter in obtaining reliable hardness readings from a portable hardness reader. A proper surface preparation method was established by using three different cleaning methods, finished with hand sanding to achieve surface roughness coefficients sufficiently low not to distort the results. This work showed that a test surface roughness (Ra) is not more than 1.6 micron meter (μm) is required for accurate readings from the TH170 tester. A case study on an earthquake affected building was carried out to identify the relationship between hardness and amount of plastic strain demand in cyclically deformed active links. Hardness was carried out from active links shown visually to have been the most affected during one of the major earthquake events. Onsite hardness test results were then compared with laboratory hardness test results. A good relationship between hardness from onsite and laboratory was observed between the test methods; Rockwell B bench top and portable Leeb tester TH170. Manufacturing induced plastic strain in the top and bottom of the webs of hot rolled sections were discovered from this research, an important result which explains why visual effects of earthquake induced active link yielding (eg cracked or flaking paint) was typically more prevalent over the middle half depth of the active link. The extent of this was quantified. It was also evident that the hardness readings from the portable hardness tester are influenced by geometry, mass effects and rigidity of the links. The final experimental stage was application of the method to full scale cyclic inelastic tested nominally identical active links subjected to loading regimes comprising constant and variable plastic strain demands. The links were cyclically loaded to achieve different plastic strain level. A novel Digital Image Correlation (DIC) technique was incorporated during the tests of this scale, to confirm the level of plastic strain achieved. Tensile test specimens were water jet cut from cyclically deformed webs to analyse the level of plastic strain. Test results show clear evidence that cyclically deformed structural steel elements show good correlation between hardness and the amount of plastic strain demand. DIC method was found to be reliable and accurate to check the level of plastic strain within cyclically deformed structural steel elements.

Images, UC QuakeStudies

A camera man filming Christchurch Mayor Bob Parker and Earthquake Recovery Minister Gerry Brownlee handling a jackhammer on Kingsford Street in Burwood. This was part of the opening of the Stronger Christchurch Infrastructure Rebuild Team (SCIRT). A contractor is standing to the left.

Images, UC QuakeStudies

A green notice on a building on Manchester Street, indicating that it has been assessed by structural engineers and is safe. Every building in Christchurch was assessed in this way, a green, yellow or red notice placed on the front door or window. Green means ok to enter; yellow, restricted use; red, not safe to enter.

Images, UC QuakeStudies

Foam hearts with uplifting messages pegged to the fence surrounding Knox Presbyterian Church. The heart on the left reads, "We're all in this together. Christchurch, we love you! Xx". The heart on the right reads, "'We can do no great things; only small things with great love.' Mother Teresa

Images, UC QuakeStudies

A photograph submitted by Bettina Evans to the QuakeStories website. The description reads, "A memorial blanket in creation, depicting some of the buildings lost in the earthquake in Lyttelton. Dozens of people are helping with the sewing – this is a follow on from the heart stitching which happened spontaneously in Lyttelton on London street after the February earthquake.".

Images, UC QuakeStudies

A piece of decorated furniture in the Words of Hope project. Messages can be seen, such as "Don't waste this chance Chch" and "CCC Councillors and CERA: Please please please open your minds and do things differently - what you do here will last generations - make a positive change".

Images, UC QuakeStudies

A photograph of Nick Sargent sitting at a table at the Pallet Pavilion during Supernova City, a drawing workshop led by Melbourne-based New Zealand artist and architect Byron Kinnaird. This event was part of FESTA 2013, and invited people to make new, imaginative drawings of Christchurch city.

Images, UC QuakeStudies

A photograph of the clock drive of the Townsend Telescope. The telescope is in the Observatory at the Christchurch Arts Centre. This image was used by Graeme Kershaw, Technician at the University of Canterbury Department of Physics and Astronomy, to identify the telescope's parts after the 22 February 2011 earthquake.