A close-up photograph of the damaged tiles and stonework on the roof on the north side of Christ Church Cathedral. The small stained-glass window at the top of the gable has been broken.
Seismic retrofitting of unreinforced masonry buildings using posttensioning has been the topic of many recent experimental research projects. However, the performance of such retrofit designs in actual design level earthquakes has previously been poorly documented. In 1984 two stone masonry buildings within The Arts Centre of Christchurch received posttensioned seismic retrofits, which were subsequently subjected to design level seismic loads during the 2010/2011 Canterbury earthquake sequence. These 26 year old retrofits were part of a global scheme to strengthen and secure the historic building complex and were subject to considerable budgetary constraints. Given the limited resources available at the time of construction and the current degraded state of the steel posttension tendons, the posttensioned retrofits performed well in preventing major damage to the overall structure of the two buildings in the Canterbury earthquakes. When compared to other similar unretrofitted structures within The Arts Centre, it is demonstrated that the posttensioning significantly improved the in-plane and out-of-plane wall strength and the ability to limit residual wall displacements. The history of The Arts Centre buildings and the details of the Canterbury earthquakes is discussed, followed by examination of the performance of the posttension retrofits and the suitability of this technique for future retrofitting of other historic unreinforced masonry buildings. http://www.aees.org.au/downloads/conference-papers/
The southern side of the Christ Church Cathedral with boarded up windows and damage to the roof above both of the transepts. Damaged masonry has been piled on the ground in front and one of the spires has been removed and braced with steel in the foreground.
A mini golf course on a the site of a demolished building. It has been built by Gap Filler out of stones and green felt.
A mini golf course on a the site of a demolished building. It has been built by Gap Filler out of stones and green felt.
A photograph captioned by BeckerFraserPhotos, "Provincial Council Chambers".
Collapsed scaffolding beside the badly damaged Stone Chamber of the Provincial Council Buildings. The photographer comments, "A bike ride around the CBD. Provincial Chambers, Durham St".
Messages are written on stones and laid in a circle with flowers at the CTV building site on the anniversary of the 22 February 2011 earthquake.
Messages are written on stones and laid in a circle with flowers at the CTV building site on the anniversary of the 22 February 2011 earthquake.
Messages are written on stones and laid in a circle with flowers at the CTV building site on the anniversary of the 22 February 2011 earthquake.
Detail of damage to a building on High Street. The photographer comments, "The support for the veranda has pulled part of the stone wall completely away".
Photograph captioned by BeckerFraserPhotos, "Scaffolding collapsed at the Provincial Council Chamber, Durham Street".
The damaged Cathedral of the Blessed Sacrament. The tower on the south-west corner of the building has collapsed, and a vehicle has been crushed by the falling stones.
A photograph captioned by BeckerFraserPhotos, "Provincial Council Chambers".
Photograph captioned by BeckerFraserPhotos, "St John the Baptist, Latimer Square".
The damaged Cathedral of the Blessed Sacrament. The tower on the north-west corner of the building has partially collapsed, and stones have fallen onto the ground in front.
A photograph of the Cranmer Centre on Armagh Street. The stone tips of two gables have been removed from the building and placed together on the lawn.
A photograph of the Cranmer Centre on Armagh Street. The stone tips of two gables have been removed from the building and placed together on the lawn.
Photograph captioned by BeckerFraserPhotos, "Former Trinity Congregational Church to be retained and rebuilt".
Repair work being done to the Victoria Clock Tower on the corner of Montreal Street and Victoria Street.
Photograph captioned by BeckerFraserPhotos, "Octagon Live (formerly Trinity Congregational Church), 124 Worcester Street (corner of Manchester Street)".
A photograph captioned by BeckerFraserPhotos, "Site meeting at the Provincial Council Chambers".
Damage to the Provincial Council Buildings. The Stone Chamber has collapsed, and is behind cordon fencing. The photographer comments, "A bike ride around the CBD. Provincial Chambers, Durham St".
A mini golf course on a the site of a demolished building. It has been built by Gap Filler out of planks of wood, stones, bricks and green felt.
People look through the cordon fence at the badly damaged Stone Chamber of the Provincial Council Buildings. The photographer comments, "A bike ride around the CBD. Provincial Chambers, Durham St".
Military personnel sit outside a security checkpoint tent. In the background, the stone cladding of a gable end on the Cranmer Courts building has collapsed, exposing the wooden framework beneath.
People walk past the cordon fence beside the badly damaged Stone Chamber of the Provincial Council Buildings. The photographer comments, "A bike ride around the CBD. Provincial Chambers, Durham St".
People walk past the cordon fence beside the badly damaged Stone Chamber of the Provincial Council Buildings. The photographer comments, "A bike ride around the CBD. Provincial Chambers, Durham St".
A view looking south down Durham Street during the aftermath of the 22 February 2011 earthquake. On the left are the ruins of the historic stone Provincial Council Legislative Chamber. The building's roof and walls have already collapsed, as has the scaffolding which was erected to repair it after the 4 September 2010 earthquake. An aftershock has caused masonry to dislodge from the building, sending dust into the air.
A view looking south down Durham Street during the aftermath of the 22 February 2011 earthquake. On the left are the ruins of the historic stone Provincial Council Legislative Chamber. The building's roof and walls have already collapsed, as has the scaffolding which was erected to repair it after the 4 September 2010 earthquake. An aftershock has caused masonry to dislodge from the building, sending dust into the air.