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Images, UC QuakeStudies

A photograph of the earthquake damage to Stonehurst Accommodation on Gloucester Street. The bottom storey of the closest building has collapsed and the top two storeys are sitting on a pile of rubble. More rubble has also spilled into the driveway to the right. Wire fencing has been placed around the buildings as a cordon.

Images, UC QuakeStudies

A photograph of rubble from a number of earthquake-damaged buildings on Bealey Avenue. Bricks from the building in the distance have spilled onto the footpath in front and wire fencing has been used to cordon it off. In the foreground, rubble from a demolished house can be seen. Cordon tape reading "danger keep out" has been draped across the fence.

Images, UC QuakeStudies

A photograph of the earthquake damage to the Provincial Hotel on the corner of Barbadoes and Cashel Streets. The second storey walls have crumbled, and the bricks have fallen onto the ground below. Scaffolding erected in front of the building is now on a lean. Wire fencing has been placed around the building as a cordon.

Images, UC QuakeStudies

A photograph of earthquake-damaged buildings and rubble on Colombo Street near the intersection of St Asaph Street. The walls of the top storey of the buildings to the left have crumbled, and bricks and other rubble have fallen onto the footpath and road below. Wire fencing and police tape have been placed across the street as a cordon.

Images, UC QuakeStudies

A photograph of earthquake-damaged buildings and rubble on Colombo Street near the intersection of St Asaph Street. The walls of the top storey of the buildings to the left have crumbled, and bricks and other rubble have fallen onto the footpath and road below. Wire fencing and police tape have been placed across the street as a cordon.

Images, UC QuakeStudies

A photograph of earthquake damage to the Cranmer Centre on the corner of Armagh and Montreal Streets. Large sections of the wall have collapsed, the bricks spilling onto the footpath below. Wire fencing has been placed around the building as a cordon. Scaffolding has been erected up the side of the building to the left.

Images, UC QuakeStudies

A photograph of the earthquake damage to the John Burns & Co. Ltd building on Lichfield Street. The top section of the side wall has collapsed and the bricks have spilled onto the car park below, exposing the inside of the building. Several crushed cars have been removed from the car park and stacked on the street.

Images, UC QuakeStudies

A photograph of the earthquake damage to the Cranmer Courts on the corner of Montreal and Kilmore Streets. Two chimneys have been removed from the building and placed on the footpath in front. Various pieces of fallen masonry can also be seen on the footpath. Wire fencing and road cones have been placed around the building as a cordon.

Images, UC QuakeStudies

A photograph of rock fall near The Razza Bar & Bistro on Wakefield Avenue. The rocks have come loose from the cliffs above and landed between the bar and the Sumner Redcliffs Returned Services Association (RSA) building. A section of the back of the Sumner Redcliffs RSA building has been damaged by the rock fall.

Images, UC QuakeStudies

A photograph of the earthquake damage to the Kenton Chambers Building on Hereford Street. Large cracks have formed in the columns between the building's windows. A section on the bottom storey has collapsed and the bricks have spilled onto the footpath in front. Steel fences have been placed across the street as a cordon.

Images, UC QuakeStudies

A photograph of the earthquake damage to a building in Lyttelton. The brick wall has crumbled and the bricks have spilt onto the pavement below. The pink batts are now exposed and the remaining wall is severely cracked. Wire fencing and tape reading "danger keep out" has been placed around the building as a cordon.

Images, UC QuakeStudies

Members of the USAID Disaster Assistance Response Team (DART) and New Zealand Urban Search and Rescue breaking through the floor of a building which was severely damaged during the 22 February 2011 earthquake.

Images, UC QuakeStudies

Members of the USAID Disaster Assistance Response Team (DART) and New Zealand Urban Search and Rescue breaking through the floor of a building which was severely damaged during the 22 February 2011 earthquake.

Images, UC QuakeStudies

The Arts Centre photographed shortly after the 22 February 2011 earthquake. A large crack can be seen in the tower and part of the brickwork around the clock has collapsed onto the pavement below. Scaffolding was placed up against the building after the 4 September 2010 earthquake and the gable was braced with wooden planks. This probably limited the damage to this part of the building. The building has been cordoned off with tape reading, 'Danger keep out'. A sign in front of the door reads, 'Site closed'.

Images, UC QuakeStudies

A photograph of the earthquake damage to R&R Sport on the corner of Colombo and Tuam Streets. Most of the side wall has crumbled, the bricks spilling onto the footpath below. Plywood and plastic sheeting has been used to weather proof the building. Wire fencing and road cones have been placed around the building as a cordon. A cherry picker is parked on the footpath in between the building and the fence.

Images, UC QuakeStudies

A photograph looking east down Gloucester Street from near the Manchester Street intersection. Members of the Wellington Emergency Management Office Emergency Response Team and construction workers are walking down the street. To their right is the new Press House building with many broken windows. In the foreground, the Coachman building has sustained earthquake damage to the façade. Wire fences have been placed around the building as a cordon.

Images, UC QuakeStudies

A photograph of members of the Wellington Emergency Management Office Emergency Response Team examining an earthquake-damaged building on Acton Street. The closest section of the outer wall has collapsed, and the bricks and other rubble have fallen onto the pavement in front. A boat which was being stored inside has toppled over and is now sticking out of the building. Several cars, also stored inside the building, are visible.

Images, UC QuakeStudies

Damaged workshops in the Red Bus depot on Fitzgerald Avenue. The brick walls have partially crumbled. In the background is the Cathedral of the Blessed Sacrament, with its dome partly deconstructed. The photographer comments, "This photo was taken recently on Fitzgerald Avenue. Again, it's amazing how close you can get to buildings that look like they are about to collapse. In the background, you can see that work has begun to remove the dome on top of the damaged Cathedral of he Blessed Sacrament".

Images, UC QuakeStudies

Damaged workshops in the Red Bus depot on Fitzgerald Avenue. The brick walls have partially crumbled. In the background is the Cathedral of the Blessed Sacrament, with its dome partly deconstructed. The photographer comments, "This photo was taken recently on Fitzgerald Avenue. Again, it's amazing how close you can get to buildings that look like they are about to collapse. In the background, you can see that work has begun to remove the dome on top of the damaged Cathedral of he Blessed Sacrament".

Images, UC QuakeStudies

Members of the USAID Disaster Assistance Response Team (DART) and the New Zealand Urban Search and Rescue, breaking through the floor of a building which was severely damaged during the 22 February 2011 earthquake.

Research papers, The University of Auckland Library

During the Christchurch earthquake of February 2011, several midrise buildings of Reinforced Concrete Masonry (RCM) construction achieved performance levels in the range of life safety to near collapse levels. These buildings were subjected to seismic demands higher than the building code requirements of the time and higher than the current New Zealand Loadings Standard (NZS-1170.5:2004). Structural damage to these buildings has been documented and is currently being studied to establish lessons to be learned from their performance and how to incorporate these lessons into future RCM design and construction practices. This paper presents a case study of a six story RCM building deemed to have reached the near collapse performance level. The RCM walls on the 2nd floor failed due to toe crushing reducing the building’s lateral resistance in the east-west direction. A nonlinear dynamic analysis on a 3D model was conducted to simulate the development of the governing failure mechanism. Preliminary analysis results show that the damaged walls were initially under large compression forces from gravity loads which caused increase in their lateral strength and reduced their ductility. After toe crushing failure developed, axial instability of the model was prevented by a redistribution of gravity loads.