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Research papers, University of Canterbury Library

Many buildings with relatively low damage from the 2010-2011 Canterbury were deemed uneconomic to repair and were replaced [1,2]. Factors that affected commercial building owners’ decisions to replace rather than repair, included capital availability, uncertainty with regards to regional recovery, local market conditions and ability to generate cash flow, and repair delays due to limited property access (cordon). This poster provides a framework for modeling decision-making in a case where repair is feasible but replacement might offer greater economic value – a situation not currently modeled in engineering risk analysis.

Research papers, University of Canterbury Library

Unreinforced masonry churches in New Zealand, similarly to everywhere else in the word have proven to be highly vulnerable to earthquakes, because of their particular construction features. The Canterbury (New Zealand) earthquake sequence, 2010-2011 caused an invaluable loss of local architectural heritage and of churches, as regrettably, some of them were demolished instead of being repaired. It is critical for New Zealand to advance the data collection, research and understanding pertaining to the seismic performance and protection of church buildings, with the aim to:

Images, UC QuakeStudies

A photograph of the Townsend Telescope in the Observatory at the Christchurch Arts Centre. This image was used by Graeme Kershaw, Technician at the University of Canterbury Department of Physics and Astronomy, to identify the telescope's parts after the 22 February 2011 earthquake.

Images, UC QuakeStudies

A photograph of the Townsend Telescope in the Observatory at the Christchurch Arts Centre. This image was used by Graeme Kershaw, Technician at the University of Canterbury Department of Physics and Astronomy, to identify the telescope's parts after the 22 February 2011 earthquake.

Images, UC QuakeStudies

University of Canterbury students outside one of the tents used while lecture theatres were closed for structural testing. The photographer comments, "The University restarts its teaching, and the techies in e-learning move out of NZi3. Students leave a lecture tent".

Images, UC QuakeStudies

A photograph of the earthquake damage to the Canterbury Provincial Chambers on Durham Street. The top of the chamber has crumbled, and the masonry has fallen onto the footpath. Scaffolding which was erected after the 4 September 2010 earthquake has also fallen.

Images, UC QuakeStudies

A photograph of the earthquake damage to the Canterbury Provincial Chambers on Durham Street. The top of the chamber has crumbled, and the masonry has fallen onto the footpath. Scaffolding which was erected after the 4 September 2010 earthquake has also fallen.

Articles, UC QuakeStudies

A copy of Stars in a Cluster, a book by the Department of Physics and Astronomy at the University of Canterbury. The book was published in 1996 and edited by W. Tobin and G.M. Evans. This PDF version was created in 2014.

Images, UC QuakeStudies

Members of the University of Canterbury's E-Learning team meet at a staff member's home on Wairakei Road. The photographer comments, "E-Learning and Library staff plan for a return to UC. L-R Heather Jenks, Alison McIntyre, Susan Tull, Jess Hollis".

Research papers, University of Canterbury Library

This study explicitly investigates uncertainties in physics-based ground motion simulation validation for earthquakes in the Canterbury region. The simulations utilise the Graves and Pitarka (2015) hybrid methodology, with separately quantified parametric uncertainties in the comprehensive physics and simplified physics components of the model. The study is limited to the simulation of 148 small magnitude (Mw 3.5 – 5) earthquakes, with a point source approximation for the source rupture representations, which also enables a focus on a small number of relevant uncertainties. The parametric uncertainties under consideration were selected through sensitivity analysis, and specifically include: magnitude, Brune stress parameter and high frequency rupture velocity. Twenty Monte Carlo realisations were used to sample parameter uncertainties for each of the 148 events. Residuals associated with the following intensity measures: spectral acceleration, peak ground velocity, arias intensity and significant duration, were ascertained. Using these residuals, validation was performed through assessment of systematic biases in site and source terms from mixed-effects regression. Based on the results to date, initial standard deviation recommendations for parameter uncertainties, based on the Canterbury simulations have been obtained. This work ultimately provides an initial step toward explicit incorporation of modelling uncertainty in simulated ground motion predictions for future events, which will improve the use of simulation models in seismic hazard analysis. We plan to subsequently assess uncertainties for larger magnitude events with more complex ruptures, and events across a larger geographic region, as well as uncertainties due to path attenuation, site effects, and more general model epistemic uncertainties.

Images, UC QuakeStudies

University of Canterbury students attend a lecture in a tent while lecture theatres were closed for structural testing. The photographer comments, "The University restarts its teaching, and the techies in e-learning move out of NZi3. Lectures in progress in UC's tent village".

Images, UC QuakeStudies

Members of the University of Canterbury's E-Learning team meet at a staff member's home on Wairakei Road. The photographer comments, "E-Learning team & library staff meet for a briefing and to plan a return to work. L-R Herbert Thomas, Alan Hoskin, Anne Scott".

Images, UC QuakeStudies

Members of the University of Canterbury's E-Learning team in their temporary office space in the NZi3 building. The photographer comments, "E-Learning group meeting; Jess Hollis, Antoine Monti, Susan Tull, Alan Hoskin, Herbert Thomas, Nikki Saunders. Paul Nicholls at rear by window".