
As a result of the findings and recommendations of the Royal Commission of Inquiry into the Canterbury Earthquake Swarm of 2010-2011 the New Zealand Government has introduced new legislation that will require the mandatory strengthening of all earthquake-prone buildings in New Zealand. An earthquake prone building is currently defined as a building that is less than one third the seismic strength of a new building. If an owner does not wish to strengthen their buildings then they must demolish them. Seismic retrofitting of buildings is a form of property development and as such, the decision to retrofit or not should be based on a robust and soundly conducted feasibility study. Feasibility studies on seismic retrofitting can be particularly challenging for a number of reasons thus making it difficult for owners to make informed and sound decisions relating to their earthquake prone buildings. This paper considers the concept and process of feasibility analysis as applied to earthquake prone buildings and discusses the current challenges posed by such feasibility studies. A number of recommendations are made in an attempt to help develop a best practice model for decision making relating to earthquake prone buildings."
There's good news of sorts on the building-inspection front in Auckland. After nearly seven days of fanning out across the city inspecting damaged buildings - the biggest such deployment of building inspectors since the Christchurch earthquake emergency - the operation will be scaled back this weekend. There are currently around 95 inspectors in the field who have checked 3,500 buildings. As of 6pm last night 190 buildings were red stickered, and a further 790 yellow stickered. The most red stickered areas are Mount Albert/Mt Eden with 54 and the North Shore with 32. Auckland Council general manager building consents Ian McCormick spoke to Corin Dann.
Page 5 of Section A of the Christchurch edition of the Christchurch Press, published on Saturday 18 August 2012.
A video of the demolition of the PricewaterhouseCoopers Building, recorded inside the building.
The flyer for the seminar "Seismic Assessment of Existing Masonry Buildings" presented by Professor Sergio Lagomarsino from the University of Genoa. The seminar demonstrated recent European research into modelling strategies, target performances and acceptance criteria for seismic assessment of masonry buildings.
A scanned copy of a photograph of the University of Canterbury UCSA (then Students' Union) building. The photograph was taken from across the stream on University Drive. Students are lounging on the lawn in front of the building.
Very sad - was a nice looking building. This is near the top of the building and there is signs of the top being displaced horizontally.
A rescue worker carries the dead body of a woman out of the crumbled remains of a building. Nearby is a copy of the 'Building Code'. Context - there are questions being asked about whether some of the buildings that collapsed too readily in the Christchurch earthquake of 22 February 2011 had been subject to stringent enough building code regulations. The Department of Building and Housing said the vertical shaking in the central business district was both extreme and unusual and early indications suggest it was much more violent than designed for in the building code standards which are based on the kind of shaking expected to happen every 500 years. Quantity: 1 digital cartoon(s).
An infographic showing the causes of the CTV building collapse.
Damaged buildings and empty demolition sites. The building on the left has had tarpaulins placed on it to prevent weather damage to the inside of the building.
The destruction of the Radio Network building in Christchurch has prompted hopes that explosive demolition could be used to bring down other earthquake-damaged buildings.
A logo for a feature titled, "CTV inquest".
None
None
Page 3 of Section A of the Christchurch Press, published on Friday 7 September 2012.
Page 3 of Section A of the Christchurch Press, published on Wednesday 14 December 2011.
A photograph of the site of a demolished building on Tuam Street. The NewstalkZB building on Worcester Street can be seen in the distance.
Some Christchurch building owners say a bulldozer's the best option, despite the city council calling for government help to rebuild heritage buildings damaged by the earthquake.
Page 4 of Section A of the Christchurch Press, published on Tuesday 11 December 2012.
Seismic isolation is an effective technology for significantly reducing damage to buildings and building contents. However, its application to light-frame wood buildings has so far been unable to overcome cost and technical barriers such as susceptibility of light-weight buildings to movement under high-wind loading. The 1994 Northridge Earthquake (6.7 MW) in the United States, 1995 Kobe Earthquake (6.9 MW) in Japan and 2011 Christchurch Earthquake (6.7 Mw) all highlighted significant loss to light-frame wood buildings with over half of earthquake recovery costs allocated to their repair and reconstruction. This poster presents a value case to highlight the benefits of seismically isolated residential buildings compared to the standard fixed-base dwellings for the Wellington region. Loss data generated by insurance claim information from the 2011 Christchurch Earthquake has been used to determine vulnerability functions for the current light-frame wood building stock. By using a simplified single degree of freedom (SDOF) building model, methods for determining vulnerability functions for seismic isolated buildings are developed. Vulnerability functions are then applied directly in a loss assessment to determine the Expected Annual Loss. Vulnerability was shown to dramatically reduce for isolated buildings compared to an equivalent fixed-base building resulting in significant monetary savings, justifying the value case. A state-of-the-art timber modelling software, Timber3D, is then used to model a typical residential building with and without seismic isolation to assess the performance of a proposed seismic isolation system which addresses the technical and cost issues.
The policing of building safety systems is being cut back nationwide. The Ministry of Business, Innovation and Employment is reducing its monitoring of the building warrants of fitness scheme that covers 16 crucial safety systems including fire measures. This coincides with it having to do more checks on what councils are doing regarding fences around pools and earthquake-prone buildings. The cutback is despite ministry reviews which show many councils do little to audit the building warrants they issue. An inspector of building safety systems and adviser on warrants, Charlie Loughnan of Canterbury, told our reporter Phil Pennington that less monitoring is not a good idea.
A banner listing the 115 people who died in the CTV building collapse.
Building rubble from part of the Terrace on the Park apartment complex. Two buildings in the complex required urgent demolition, and the other buildings in the complex will eventually be demolished.
The first report into the damage done to three large buildings in the Christchurch earthquake is recommending urgent steps be taken around the country to strengthen buildings with stairwells.
The Canterbury Earthquakes Royal Commission will hear this week that the cost of upgrading the city's unreinforced masonry buildings is more than the buildings are worth.
Building rubble from part of the Terrace on the Park apartment complex. Two buildings in the complex required urgent demolition, and the other buildings in the complex will eventually be demolished.
The C.F. Cotter & Co building on High Street. Security fencing has been placed around the building to restrict access. Weeds are growing on the vacant construction lot next to the building.
An entry from Roz Johnson's blog for 5 August 2013 entitled, "Colourful Canterbury Brewery Building Going".
Page 4 of Section A of the Christchurch Press, published on Wednesday 6 April 2011.
Building had deteriorated significantly. And now it has been demolished