A video of an address by Dr. Mark Quigley, Associate Professor of Active Tectonics and Geomorphology at the University of Canterbury. This talk was given at the 2015 Seismics and the City forum and addresses changes to the lie of the land - both physical and metaphorical.
A document describing Downer's use of column seismic clamps to prevent additional damage to the Arch columns.
As a result of the findings and recommendations of the Royal Commission of Inquiry into the Canterbury Earthquake Swarm of 2010-2011 the New Zealand Government has introduced new legislation that will require the mandatory strengthening of all earthquake-prone buildings in New Zealand. An earthquake prone building is currently defined as a building that is less than one third the seismic strength of a new building. If an owner does not wish to strengthen their buildings then they must demolish them. Seismic retrofitting of buildings is a form of property development and as such, the decision to retrofit or not should be based on a robust and soundly conducted feasibility study. Feasibility studies on seismic retrofitting can be particularly challenging for a number of reasons thus making it difficult for owners to make informed and sound decisions relating to their earthquake prone buildings. This paper considers the concept and process of feasibility analysis as applied to earthquake prone buildings and discusses the current challenges posed by such feasibility studies. A number of recommendations are made in an attempt to help develop a best practice model for decision making relating to earthquake prone buildings."
This paper presents a seismic velocity model of Canterbury, New Zealand based on 3D geologic surfaces and velocities from a range of data sources. The model provides the 3D crustal structure in the region at multiple length scales for seismic wave propagation simulations, such as broadband ground motion and shallow site response analyses related to understanding the ground motions and site responses during the 2010- 2011 Canterbury earthquakes. Pre-Quaternary geologic horizons are calculated based on the reinterpretation of a comprehensive network of seismic reflection surveys from seven different campaigns over the past 50 years, as well as point constraints across an array of petroleum industry drill holes. Particular attention is given to a detailed representation of Quaternary stratigraphy, representing shallow (z<250m) near-surface layers in the model. Seismic velocities are obtained from seismic reflection processing (for Vp) and also recently performed active and passive surface wave analyses (for Vs). Over 1,700 water wells in the region are used to constrain the complex inter-bedded Quaternary stratigraphy (gravels, sands, silts, organics etc.) near the coastline, including beneath urban Christchurch, which has resulted from fluvial deposition and marine regression and transgression. For the near-surface Springston and Christchurch Formations in the Christchurch urban area (z<50m), high-spatial resolution seismic velocities (including Vs30 ) were obtained from over 13,000 cone penetration tests combined with a recently developed CPT-Vs correlation.
A video of an address by Russell Stanners, CEO of Vodafone, at the 2015 Seismics and the City forum. This talk focuses on smart buildings and new ways of working.
A video of an address by Corrine Haines, Managing Director of Trimble, at the 2015 Seismics and the City forum. This talk focuses on smart buildings and new ways of working.
A video of an address by David Ayers, Mayor of Waimakariri District, at the 2015 Seismics and the City forum. The talk is about providing opportunities for input and feedback.
A video of an address by Carolyn Robertson, Libraries and Information Manager of Christchurch Libraries, at the 2015 Seismics and the City forum. The talk is about providing opportunities for input and feedback.
A video of an address by Keith Land, Head of Canterbury Land Settlement, EQC, at the 2015 Seismics and the City forum. This talk is about learning from complex claims and local knowledge.
A video of an address by developer Stephen Collins, at the 2015 Seismics and the City forum. This talk focuses on commercial development progress, and opportunities and issues in Central Christchurch and beyond.
A video of an address by Dr. Duncan Webb, Partner of Lane Neave, at the 2015 Seismics and the City forum. This talk is about learning from complex claims and local knowledge.
A video of an address by Geoff Cavell, Managing Director of Winnie Bagoes Holding Ltd, at the 2015 Seismics and the City forum. This talk is about learning from complex claims and local knowledge.
A video of an address by Blair Chapell, CPIT graduand, at the 2015 Seismics and the City forum. Mr. Chapell shares his aspirations for a renewed Christchurch and his goals for contributing to this.
A video of an address by Evan Smith, Co-Chair of the Avon-Otakaro Network and Programme Manager of Eastern Vision, at the 2015 Seismics and the City forum. The talk is about providing opportunities for input and feedback.
A video of an address by Kevin Lynn, General Manager of Commercial Operations at Schneider Electric NZ, at the 2015 Seismics and the City forum. This talk focuses on smart buildings and new ways of working.
A video of an address by Megan Veitch, University of Canterbury student, at the 2015 Seismics and the City forum. Ms. Veitch shares her aspirations for a renewed Christchurch and her goals for contributing to this.
A video of an address by Peter Rose, Chief Executive of Southern Response Earthquake Services Limited, at the 2015 Seismics and the City forum. This talk is about learning from complex claims and local knowledge.
A video of an address by Nick Hunt, Managing Director of Lichfield Holdings Ltd, at the 2015 Seismics and the City forum. This talk focuses on commercial development progress, and opportunities and issues in Central Christchurch and beyond.
A video of an address by Tom Beaumont, Founder and CEO of Clean Streams, at the 2015 Seismics and the City forum. Mr. Beaumont shares his aspirations for a renewed Christchurch and his goals for contributing to this.
A video of an address by Brian Parker, Project Manager of Canterbury Communities' Earthquake Recovery Network (CanCERN) and Managing Director of Sharp Teaching, at the 2015 Seismics and the City forum. This talk is about learning from complex claims and local knowledge.
A video of an address by John Ombler, Acting CEO of CERA, at the 2015 Seismics and the City forum. In this talk, Mr. Ombler shares his take on the progress if the rebuild, positive signs of advancement and what's in the pipeline; and how the main obstacles can be resolved.
A video of an address by Ian Simpson, CEO of CERA, at the 2015 Seismics and the City forum. In this talk, Mr. Simpson shares his take on the progress of the rebuild, positive signs of advancement and what's in the pipeline; and how the main obstacles can be resolved.
A video of an address by Joanna Norris, Editor of The Press, at the 2015 Seismics and the City forum. In this talk, Ms. Norris shares her take on the progress of the rebuild, positive signs of advancement and what's in the pipeline; and how the main obstacles can be resolved.
A video of an address by Raf Manji, Finance Spokesperson at the Christchurch City Council, at the 2015 Seismics and the City forum. In this talk, Mr. Manji shares his take on the progress of the rebuild, positive signs of advancement and what's in the pipeline; and how the main obstacles can be resolved.
A video of an address by Hon. Nicky Wagner, Associate Minister for the Canterbury Earthquake Recovery, at the 2015 Seismics and the City forum. In this talk, Minister Wagner shares her take on the progress of the rebuild, positive signs of advancement and what's in the pipeline; and how the main obstacles can be resolved.
A video of an address by Peter Townsend, CEO of Canterbury Employers Chamber of Commerce, at the 2015 Seismics and the City forum. In this talk, Mr. Townsend shares his take on the progress of the rebuild, positive signs of advancement and what's in the pipeline; and how the main obstacles can be resolved.
This paper presents an examination of ground motion observations from 20 near-source strong motion stations during the most significant 10 events in the 2010-2011 Canterbury earthquake to examine region-specific systematic effects based on relaxing the conventional ergodic assumption. On the basis of similar site-to-site residuals, surfical geology, and geographical proximity, 15 of the 20 stations are grouped into four sub-regions: the Central Business District; and Western, Eastern, and Northern suburbs. Mean site-to-site residuals for these sub-regions then allows for the possibility of non-ergodic ground motion prediction over these sub-regions of Canterbury, rather than only at strong motion station locations. The ratio of the total non-ergodic vs. ergodic standard deviation is found to be, on average, consistent with previous studies, however it is emphasized that on a site-by-site basis the non-ergodic standard deviation can easily vary by ±20%.
This study investigates evidence for linkages and fault interactions centred on the Cust Anticline in Northwest Canterbury between Starvation Hill to the southwest and the Ashley and Loburn faults to the northeast. An integrated programme of geologic, geomorphic, paleo-seismic and geophysical analyses was undertaken owing to a lack of surface exposures and difficulty in distinguishing active tectonic features from fluvial and/or aeolian features across the low-relief Canterbury Plains. LiDAR analysis identified surface expression of several previously unrecognised active fault traces across the low-relief aggradation surfaces of the Canterbury Plains. Their presence is consistent with predictions of a fault relay exploiting the structural mesh across the region. This is characterised by interactions of northeast-striking contractional faults and a series of re-activating inherited Late Cretaceous normal faults, the latter now functioning as E–W-striking dextral transpressive faults. LiDAR also allowed for detailed analysis of the surface expression of individual faults and folds across the Cust Anticline contractional restraining bend, which is evolving as a pop-up structure within the newly established dextral shear system that is exploiting the inherited, now re-activated, basement fault zone. Paleo-seismic trenches were located on the crest of the western arm of the Cust Anticline and across a previously unrecognised E–W-striking fault trace, immediately southwest of the steeply plunging Cust Anticline termination. These studies confirmed the location and structural style of north-northeast-striking faults and an E–W-striking fault associated with the development of this structural culmination. A review of available industry seismic reflection lines emphasised the presence of a series of common structural styles having the same underlying structural drivers but with varying degrees of development and expression, both in the seismic profiles and in surface elevations across the study area. Based on LiDAR surface mapping and preliminary re-analysis of industry seismic reflection data, four fault zones are identified across the restraining bend structural culminations, which together form the proposed Oxford–Cust–Ashley Fault System. The 2010–2012 Canterbury Earthquake Sequence showed many similarities to the structural pattern established across the Oxford–Cust–Ashley Fault System, emphasising the importance of identification and characterization of presently hidden fault sources, and the understanding of fault network linkages, in order to improve constraints on earthquake source potential. Improved understanding of potentially-interactive fault sources in Northwest Canterbury, with the potential for combined initial fault rupture and spatial and temporal rupture propagation across this fault system, can be used in probabilistic seismic hazard analysis for the region, which is essential for the suitability and sustainability of future social and economic development.
The sequence of earthquakes that has affected Christchurch and Canterbury since September 2010 has caused damage to a great number of buildings of all construction types. Following post-event damage surveys performed between April 2011 and June 2011, an inventory of the stone masonry buildings in Christchurch and surrounding areas was carried out in order to assemble a database containing the characteristic features of the building stock, as a basis for studying the vulnerability factors that might have influenced the seismic performance of the stone masonry building stock during the Canterbury earthquake sequence. The damage suffered by unreinforced stone masonry buildings is reported and different types of observed failures are described using a specific survey procedure currently in use in Italy. The observed performance of seismic retrofit interventions applied to stone masonry buildings is also described, as an understanding of the seismic response of these interventions is of fundamental importance for assessing the utility of such strengthening techniques when applied to unreinforced stone masonry structures. AM - Accepted Manuscript
A video of a panel summary at the 2015 Seismics and the City forum, featuring Hon. Nicky Wagner, Associate Minister for the Canterbury Earthquake Recovery; John Ombler, Acting CEO of CERA; Ian Townsend, CEO of CERA; Raf Manji, Finance Spokesperson at the Christchurch City Council; Peter Townsend, CEO of Canterbury Employers Chamber of Commerce; and Joanna Norris, Editor of The Press.