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Research papers, University of Canterbury Library

This paper describes pounding damage sustained by buildings and bridges in the February 2011 Christchurch earthquake. Approximately 6% of buildings in Christchurch CBD were observed to have suffered some form of serious pounding damage. Almost all of this pounding damage occurred in masonry buildings, further highlighting their vulnerability to this phenomenon. Modern buildings were found to be vulnerable to pounding damage where overly stiff and strong ‘flashing’ components were installed in existing building separations. Soil variability is identified as a key aspect that amplifies the relative movement of buildings, and hence increases the likelihood of pounding damage. Pounding damage in bridges was found to be relatively minor and infrequent in the Christchurch earthquake.

Audio, Radio New Zealand

The Royal Commission into the Canterbury Earthquakes has heard evidence questioning the measure used to judge how resistant a building is to earthquake damage. It's come on the second day of hearings into why unreinforced masonry buildings collapsed in Christchurch during the February 22nd earthquake, killing 40 people.

Images, Alexander Turnbull Library

Text reads 'Collateral damage'. A couple stand looking at a broken column surrounded by fallen masonry; text on the column reads 'Curbs on govt spending'. The man says 'It's a shame. It was due to be unveiled in a few weeks'. Context - the Christchurch earthquake of 22 February 2011; curbs on government spending can be seen as 'collateral damage'. In December 2010 Finance Minister Bill English pledged to keep a cap on spending to rein in a widening deficit as slower consumer demand hinders the economic recovery and hurts tax receipts. The earthquake will make economic recovery even more difficult. Quantity: 1 digital cartoon(s).

Research papers, University of Canterbury Library

On 22 February 2011，a magnitude Mw 6.3 earthquake occurred with an epicenter located near Lyttelton at about 10km from Christchurch in Canterbury region on the South Island of New Zealand (Figure 1). Since this earthquake occurred in the midst of the aftershock activity which had continued since the 4 September 2010 Darfield Earthquake occurrence, it was considered to be an aftershock of the initial earthquake. Because of the short distance to the city and the shallower depth of the epicenter, this earthquake caused more significant damage to pipelines, traffic facilities, residential houses/properties and multi-story buildings in the central business district than the September 2010 Darfield Earthquake in spite of its smaller earthquake magnitude. Unfortunately, this earthquake resulted in significant number of casualties due to the collapse of multi-story buildings and unreinforced masonry structures in the city center of Christchurch. As of 4 April, 172 casualties were reported and the final death toll is expected to be 181. While it is extremely regrettable that Christchurch suffered a terrible number of victims, civil and geotechnical engineers have this hard-to-find opportunity to learn the response of real ground from two gigantic earthquakes which occurred in less than six months from each other. From geotechnical engineering point of view, it is interesting to discuss the widespread liquefaction in natural sediments, repeated liquefaction within short period and further damage to earth structures which have been damaged in the previous earthquake. Following the earthquake, an intensive geotechnical reconnaissance was conducted to capture evidence and perishable data from this event. The team included the following members: Misko Cubrinovski (University of Canterbury, NZ, Team Leader), Susumu Yasuda (Tokyo Denki University, Japan, JGS Team Leader), Rolando Orense (University of Auckland, NZ), Kohji Tokimatsu (Tokyo Institute of Technology, Japan), Ryosuke Uzuoka (Tokushima University, Japan), Takashi Kiyota (University of Tokyo, Japan), Yasuyo Hosono (Toyohashi University of Technology, Japan) and Suguru Yamada (University of Tokyo, Japan).

Images, Alexander Turnbull Library

The letters 'CHCH' are built from broken masonry and stand amongst the chaos of broken buildings. It is the usual acronym for the city of Christchurch; here however it stands for 'catastrophe', 'havoc', 'care', 'help'. Context - on 22 February 2011 a 6.3 magnitude earthquake struck in Christchurch, which has probably killed more than 200 people (at this point the number is still not known) and caused very severe damage. The courage, generosity and 'can do' attitude of the people of Christchurch has been wonderful but the whole country and is contributing to the effort to get Christchurch back on its feet as well as aid from overseas. Quantity: 1 digital cartoon(s).