The sequence of earthquakes that has affected Christchurch and Canterbury since September 2010 has caused damage to a great number of buildings of all construction types. Following post-event damage surveys performed between April 2011 and June 2011, the damage suffered by unreinforced stone masonry buildings is reported and different types of observed failures are described. A detailed technical description of the most prevalently observed failure mechanisms is provided, with reference to recognised failure modes for unreinforced masonry structures. The observed performance of existing seismic retrofit interventions is also provided, as an understanding of the seismic response of these interventions is of fundamental importance for assessing the vulnerability of similar strengthening techniques when applied to unreinforced stone masonry structures.
A photograph looking east down Armagh Street, taken from the corner of Oxford Terrace. In the distance, the PricewaterhouseCoopers building can be seen.
A photograph of a gap between the Craig's Investment Partner House and the Victoria Apartments on Armagh Street
A photograph of the intersection of Armagh Street and Colombo Street with the partially-collapsed Winnie Bagoes building to the left.
A photograph of broken traffic light in front of a badly-damaged building on the corner of Colombo Street and Tuam Street.
A photograph of the collapsed Herbal Heaven store on the corner of Linwood Avenue and Aldwins Road.
A photograph of the earthquake damage to the McKenzie & Willis building on Tuam Street. The remains of a demolished building are in front.
A digger clearing rubble on the site of the CTV Building.
A member of the Territorial Forces Unit clearing silt from a house in east Christchurch.
A photograph looking north down Montreal Street towards the partially-demolished St Elmo Courts building. Two cranes are parked to the left.
A photograph of a badly-damaged fabric store on Tuam Street. The entire front wall has collapsed, exposing the store inside.
A photograph of earthquake-damaged buildings along Lichfield Street. Many of the buildings' facades have crumbled, and the bricks have fallen onto the road below.
A photograph looking west down Hereford Street from the intersection of Colombo Street. The footpaths are littered with broken glass and dead leaves.
A photograph of the earthquake damage to the McKenzie & Willis building on Tuam Street, with the remains of a demolished building in front.
A photograph of closed businesses on High Street. USAR codes have been spray-painted on the windows and furniture is still sitting outside.
A photograph of the earthquake-damaged Canterbury Television Building. Some of the windows have broken and large cracks can be seen in the walls.
A photograph of members from the New Zealand Urban Search and Rescue team and various workers walking along Gloucester Street.
A photograph of Red Cross team members and workers inside the temporary Civil Defence headquarters at the Christchurch Art Gallery.
A photograph looking east down Worcester Street from Cathedral Square. Wire fencing has been placed across the street as a cordon.
A photograph of businesses on Tuam Street. The second storey of the Switched On Gardener building is being reinforced with straps.
A photograph of brick buildings on Tuam Street. The entrance to SOL Square can be seen to the left, boarded up with plywood.
A photograph of the rubble from the demolished Manchester Securities House on the corner of Madras and Gloucester Streets.
A photograph of the back entrance of the badly-damaged Gordon Harris building Worcester Street. There are large cracks in the walls.
A photograph of severe cracking along the windows of the SBS bank on the corner of Manchester Street and Worcester Street.
Emergency personnel using a sheet of corrugated plastic to slide pieces of rubble of the collapsed Canterbury Television Building.
Civil Defence staff conferring at their headquarters in the Christchurch Art Gallery during the immediate aftermath of the 22 February earthquake.
Aerial image of Sumner taken by the Royal New Zealand Air Force for the Earthquake Commission.
Aerial image of Sumner taken by the Royal New Zealand Air Force for the Earthquake Commission.
Civil Defence staff conferring at their headquarters in the Christchurch Art Gallery during the immediate aftermath of the 22 February earthquake.
Civil Defence staff conferring at their headquarters in the Christchurch Art Gallery during the immediate aftermath of the 22 February earthquake.