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Research papers, University of Canterbury Library

The aim of this report is to investigate the ductile performance of concrete tilt-up panels reinforced with cold-drawn mesh to improve the current seismic assessment procedure. The commercial impact of the project was also investigated. Engineering Advisory Group (EAG) guidelines state that a crack in a panel under face loading may be sufficient to fracture the mesh. The comments made by EAG regarding the performance of cold-drawn mesh may be interpreted as suggesting that assessment of such panels be conducted with a ductility of 1.0. Observations of tilt-up panel performance following the Christchurch earthquakes suggest that a ductility higher than μ=1.0 is likely to be appropriate for the response of panels to out-of-plane loading. An experimental test frame was designed to subject ten tilt-panel specimens to a cyclic quasi-static loading protocol. Rotation ductility, calculated from the force-displacement response from the test specimens, was found to range between 2.9 and 5.8. Correlation between tensile tests on 663L mesh, and data collected from instrumentation during testing confirmed that the mesh behaves as un-bonded over the pitch length of 150mm. Recommendation: Based on a moment-rotation assessment approach with an un-bonded length equal to the pitch of the mesh, a rotation ductility of μ=2.5 appears to be appropriate for the seismic assessment of panels reinforced with cold-drawn mesh.

Images, UC QuakeStudies

A photograph of Jonathan Hall transferring Crack'd for Christchurch's ottoman artwork onto a wooden base in Helen Campbell's garage. The ottoman has been made out of polystyrene, wood, mesh, and concrete, laid over a steel frame.Crack'd for Christchurch comments, "December 2013. Jonathan delivers the footstool to Helen's garage where it will be mosaicked.."

Images, UC QuakeStudies

A photograph of Crack'd for Christchurch's partially-constructed armchair artwork. The armchair is on a pallet in Greening the Rubble's workshop. Jonathan Hall has moulded polystyrene, wood, mesh, and concrete over the steel frame to construct the armchair. Two cast-iron bath feet have attached to the front legs.

Images, UC QuakeStudies

A photograph of Crack'd for Christchurch's partially-constructed armchair artwork. The armchair is on a pallet in Greening the Rubble's workshop. Jonathan Hall has moulded polystyrene, wood, mesh, and concrete over the steel frame to construct the armchair. Two cast-iron bath feet have been attached to the front legs.

Images, UC QuakeStudies

A photograph of Crack'd for Christchurch's partially-constructed armchair artwork. The armchair is on a pallet in Greening the Rubble's workshop. Jonathan Hall has moulded polystyrene, wood, mesh, and concrete over the steel frame to construct the armchair. Two cast-iron bath feet have been attached to the front legs.

Images, UC QuakeStudies

A photograph of Crack'd for Christchurch's partially-constructed armchair artwork. The armchair is on a pallet in Greening the Rubble's workshop. Jonathan Hall has moulded polystyrene, wood, mesh, and concrete over the steel frame to construct the armchair. Two cast-iron bath feet have been attached to the front legs.

Images, UC QuakeStudies

A photograph of the steel frame of Crack'd for Christchurch's armchair artwork. The frame is on a pallet in the Greening the Rubble workshop. Two cast-iron bath feet have been attached to the front legs. The bottom half of the frame has been covered with mesh, wood, polystyrene, and concrete by Jonathan Hall.

Images, Canterbury Museum

A bunch of yellow, red and orange artificial fabric lilies tied together with green mesh fabric, purple flower paper and a golden ribbon and pink metallic string.

Images, Canterbury Museum

Fabric butterfly with wings of mesh with wire skeleton decorated with silver and blue glitter and sequins. The polystyrene body of the butterfly has a magnet attached underneath.

Images, eqnz.chch.2010

One Month after the Christchurch Earthquake. The mangled remains of the pedestrian bridge over the river Avon Twitter | Facebook | My ...

Images, eqnz.chch.2010

One Month after the Christchurch Earthquake. The mangled remains of the pedestrian bridge over the river Avon Twitter | Facebook | My ...

Images, eqnz.chch.2010

One Month after the Christchurch Earthquake. The remains of a Church in St albans, Edgeware Rd Twitter | Facebook | My Website | <...

Images, eqnz.chch.2010

One Month after the Christchurch Earthquake. This is in Kaiapoi at the north end of Christchurch. A view down the walkway next to the river Twitter | Facebook |

Images, UC QuakeStudies

A photograph of a group of tents set up in Latimer Square next to the Singapore Rescue Team's store and equipment area. Plastic mesh and tape has been placed around the tents as a fence. The tents were used as temporary accommodation for emergency management personnel after the 22 February 2011 earthquake.

Images, eqnz.chch.2010

This is the pedestrian bridge in Kaiapoi close to Christchurch. Not the best angle but the whole bridge on the right hand side is twisted and looks like some kind of rollercoaster. Taken one month after the Quake Twitter |

Images, eqnz.chch.2010

There are quite a few signs like this around Christchurch after the Quake. This is one of them. Off shot to the right is a leveled patch of ground where the owners furniture restoration shop used to be. Twitter |

Images, UC QuakeStudies

A photograph of a workstation in Crack'd for Christchurch's workshop. The workstation includes pieces of broken china, a pair of cutters for breaking up china, a plastic container to hold china pieces, and two mosaic plans. One of the plans has a piece of mesh laid over the top. The other is being used to lay out the mosaic.Crack'd for Christchurch comments, "Marie begins the very first flower. It is so difficult and time consuming that we are all in despair. Will this take forever? No-one is getting paid and we all have jobs and lives in some chaos thanks to the earthquakes."

Images, UC QuakeStudies

A photograph of a half-finished flower mosaic. The mosaic has been made out of pieces of broken china which have been laid over a paper design. Mesh has also been placed over the design so that it can be transferred easily to Crack's for Christchurch's concrete chair. Other pieces of china are scattered around the mosaic.Crack'd for Christchurch comments, "Marie begins the very first flower. It is so difficult and time consuming that we are all in despair. Will this take forever? No-one is getting paid and we all have jobs and lives in some chaos thanks to the earthquakes."

Images, UC QuakeStudies

A photograph of members of Crack'd for Christchurch working in their workshop. A number of mosaics of flowers and leaves have been laid out on the table in front of them. Boxes of broken china are organised on the shelf behind.Crack'd for Christchurch comments, "Back at the workshop, flower making continues. You can see a table covered with flower motifs, looking amazing. We had to make the flowers at home in the evenings as we all worked during the day. After much trial and error our flower experts (Helen, Sharon, and Jennie) came up with a clever way to attach the tiny pieces to mesh, so they could be transferred to the chair easily. From left: Sharon Wilson, Helen Campbell, and Shirley Walden."