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Research papers, University of Canterbury Library

Heathcote Valley school strong motion station (HVSC) consistently recorded ground motions with higher intensities than nearby stations during the 2010-2011 Canterbury earthquakes. For example, as shown in Figure 1, for the 22 February 2011 Christchurch earthquake, peak ground acceleration at HVSC reached 1.4 g (horizontal) and 2 g (vertical), the largest ever recorded in New Zealand. Strong amplification of ground motions is expected at Heathcote Valley due to: 1) the high impedance contrast at the soil-rock interface, and 2) the interference of incident and surface waves within the valley. However, both conventional empirical ground motion prediction equations (GMPE) and the physics-based large scale ground motions simulations (with empirical site response) are ineffective in predicting such amplification due to their respective inherent limitations.

Images, UC QuakeStudies

A photograph submitted by Grant Fife to the QuakeStories website. The description reads, "Canterbury Provincial Chambers 03/04/2011. This building was being stabilised and repaired after the September quake.".

Research papers, University of Canterbury Library

A significant portion of economic loss from the Canterbury Earthquake sequence in 2010-2011 was attributed to losses to residential buildings. These accounted for approximately $12B of a total $40B economic losses (Horspool, 2016). While a significant amount of research effort has since been aimed at research in the commercial sector, little has been done to reduce the vulnerability of the residential building stock.

Images, UC QuakeStudies

A photograph of a floating installation titled The River on the Avon River. The installation consists of two chairs, a lamp and a table, situated on a grass-covered platform, with net curtains hanging from the frame. It was created by students from Lincoln University's School of Landscape Architecture for Canterbury Tales, a carnivalesque procession and the main event of FESTA 2013.

Images, UC QuakeStudies

A photograph of the earthquake damage to the Canterbury Provincial Chambers Buildings on Durham Street. Large sections of the masonry have collapsed, spilling onto the road. Wire fencing has been placed around the building as a cordon. Scaffolding erected up the side of the building after the 4 September 2010 earthquake has collapsed. In the distance, a crane is parked on the street.

Research papers, University of Canterbury Library

Well-validated liquefaction constitutive models are increasingly important as non-linear time history analyses become relatively more common in industry for key projects. Previous validation efforts of PM4Sand, a plasticity model specifically for liquefaction, have generally focused on centrifuge tests; however, pore pressure transducers installed at several free-field sites during the Canterbury Earthquake Sequence (CES) in Christchurch, New Zealand provide a relatively unique dataset to validate against. This study presents effective stress site response analyses performed in the finite difference software FLAC to examine the capability of PM4Sand to capture the generation of excess pore pressures during earthquakes. The characterization of the subsurface is primarily based on extensive cone penetration tests (CPT) carried out in Christchurch. Correlations based on penetration resistances are used to estimate soil parameters, such as relative density and shear wave velocity, which affect liquefaction behaviour. The resulting free-field FLAC model is used to estimate time histories of excess pore pressure, which are compared with records during several earthquakes in the CES to assess the suitability of PM4Sand.

Images, UC QuakeStudies

An aerial photograph looking west over the Arts Centre and Christ's College towards Hagley Park. The photograph has been captioned by BeckerFraserPhotos, "At the centre of this photo is a group of heritage stone buildings. Canterbury Museum and Christ's College were extensively earthquake strengthened prior to the EQs and re-opened to the public relatively quickly. The Arts Centre is undergoing extensive renovations. Hagley Park and the Botanic Gardens provide a richly colourful surrounding to these historic buildings".

Articles, UC QuakeStudies

A PDF document which discusses the ˜lessons learned by the Christchurch Migrant Inter-Agency group after the 22 February 2011 earthquake. The group was set up to support migrants and refugees following the February 22 earthquake in 2011, and has now been dis-established. However, the Christchurch Migrant Centre continues to co-ordinate services and help migrants settle into life in Christchurch. The purpose of the report is to provide a record of key events and responses of the group in the immediate aftermath of the February 22 earthquake, and to offer some candid discussion and insight with respect to their success or otherwise.

Images, eqnz.chch.2010

Badly damaged in both the September and February quakes and over 6000 aftershocks the Point Pleasant yacht club had started to sink into the Avon estuary before being demolished in July 2011 after the June 6.3 earthquake