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Research papers, University of Canterbury Library

Over 900 buildings in the Christchurch central business district and 10,000 residential homes were demolished following the 22nd of February 2011 Canterbury earthquake, significantly disrupting the rebuild progress. This study looks to quantify the time required for demolitions during this event which will be useful for future earthquake recovery planning. This was done using the Canterbury Earthquake Recovery Authority (CERA) demolition database, which allowed an in-depth look into the duration of each phase of the demolition process. The effect of building location, building height, and the stakeholder which initiated the demolition process (i.e. building owner or CERA) was investigated. The demolition process comprises of five phases; (i) decision making, (ii) procurement and planning, (iii) demolition, (iv) site clean-up, and (v) completion certification. It was found that the time required to decide to demolish the building made up majority of the total demolition duration. Demolition projects initiated by CERA had longer procurement and planning durations, but was quicker in other phases. Demolished buildings in the suburbs had a longer decision making duration, but had little effect on other phases of the demolition process. The decision making and procurement and planning phases of the demolition process were shorter for taller buildings, though the other phases took longer. Fragility functions for the duration of each phase in the demolition process are provided for the various categories of buildings for use in future studies.

Images, UC QuakeStudies

A photograph submitted by Raymond Morris to the QuakeStories website. The description reads, "The New Zealand Express Co. Ltd. building (Manchester Courts) built in 1906 on the corner of Manchester and Hereford Sts. In its time it was Christchurch’s tallest office building. This painting is from the Raymond Morris Collection of earthquake demolished buildings.".

Images, UC QuakeStudies

An empty section on the corner of Cashel and Colombo Streets where buildings have been demolished. In the background, a "drummer boy" dummy dressed in a hi-vis jacket sits on top of one of the still-standing High Street buildings. Written on the back of the building is "Merry Christmas Christchurch Pa Rum Pum Pum Pum".