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Images for damaged houses; more images...

Images, UC QuakeStudies

Rubble in front of a two-storey house on Peterborough Street, the brick side wall of which has fallen away, exposing the rooms inside. Further rubble from a neighbouring house lies in the foreground.

Images, UC QuakeStudies

A digitally manipulated image of an excavator demolishing a house. The photographer comments, "My neighbour I thought was going to be one of the first to be rebuilt in the area after being damaged in the 22 February 2011 earthquake, but the builders have knocked it down and not returned yet".

Research papers, The University of Auckland Library

There is very little research on total house strength that includes contributions of non-structural elements. This testing programme provides inclusive stiffness and response data for five houses of varying ages. These light timber framed houses in Christchurch, New Zealand had minor earthquake damage from the 2011 earthquakes and were lateral load tested on site to determine their strength and/or stiffness, and to identify damage thresholds. Dynamic characteristics including natural periods, which ranged from 0.14 to 0.29s were also investigated. Two houses were quasi-statically loaded up to approximately 130kN above the foundation in one direction. Another unidirectional test was undertaken on a slab-on-grade two-storey house, which was also snapback tested. Two other houses were tested using cyclic quasi-static loading, and between cycles snapback tests were undertaken to identify the natural period of each house, including foundation and damage effects. A more detailed dynamic analysis on one of the houses provided important information on seismic safety levels of post-quake houses with respect to different hazard levels in the Christchurch area. While compared to New Zealand Building Standards all tested houses had an excess of strength, damage is a significant consideration in earthquake resilience and was observed in all of the houses. http://www.aees.org.au/downloads/conference-papers/2015-2/