Search

found 4537 results

Images for christchurch earthquake; more images...

Images, UC QuakeStudies

Members of the USAID Disaster Assistance Response Team (DART) setting up a tent in Latimer Square after their early-morning arrival in Christchurch. Latimer Square was set up as a temporary headquarters for emergency management personnel after the 22 February 2011 earthquake.

Images, UC QuakeStudies

A photograph of the earthquake damage to a property in the Christchurch central city. Part of the roof of the property has collapsed, spilling material onto the balcony below. A sign in the foreground reads, "Wots your councillor doing for your water?".

Images, UC QuakeStudies

A photograph of members of the New Zealand Police using a rescue dog to inspect an earthquake-damaged house in Christchurch. The front and side of the house has collapsed, the bricks and other rubble spilling onto the garden, exposing the rooms inside.

Research papers, University of Canterbury Library

Natural catastrophes are increasing worldwide. They are becoming more frequent but also more severe and impactful on our built environment leading to extensive damage and losses. Earthquake events account for the smallest part of natural events; nevertheless seismic damage led to the most fatalities and significant losses over the period 1981-2016 (Munich Re). Damage prediction is helpful for emergency management and the development of earthquake risk mitigation projects. Recent design efforts focused on the application of performance-based design engineering where damage estimation methodologies use fragility and vulnerability functions. However, the approach does not explicitly specify the essential criteria leading to economic losses. There is thus a need for an improved methodology that finds the critical building elements related to significant losses. The here presented methodology uses data science techniques to identify key building features that contribute to the bulk of losses. It uses empirical data collected on site during earthquake reconnaissance mission to train a machine learning model that can further be used for the estimation of building damage post-earthquake. The first model is developed for Christchurch. Empirical building damage data from the 2010-2011 earthquake events is analysed to find the building features that contributed the most to damage. Once processed, the data is used to train a machine-learning model that can be applied to estimate losses in future earthquake events.

Images, UC QuakeStudies

A woman casts flowers into the Avon River during the River of Flowers event held in Riccarton Bush, commemorating the second anniversary of the 22 February earthquake. In the background is the string quartet from Christchurch Girls High School which played before the event.

Research papers, The University of Auckland Library

The current seismic design practice for reinforced concrete (RC) walls has been drawn into question following the unsatisfactory performance of several RC wall buildings during the Canterbury earthquakes. An overview of current research being undertaken at the University of Auckland into the seismic behaviour of RC walls is presented. The main objectives of this research project are to understand the observed performance of RC walls in Christchurch, quantify the seismic loads on RC walls, and developed improved design procedures for RC walls that will assist in revisions to the New Zealand Concrete Structures Standard. A database summarising the performance of RC wall buildings in the Christchurch CBD was collated to identify damage modes and case-study buildings. A detailed investigation is underway to verify the seismic performance of lightly reinforced concrete walls and initial numerical modeling and small-scale tests are presented in addition to details of planned experimental tests of RC walls. Numerical modelling is being used to understand the potential influence that interactions between walls and other structural elements have on the seismic response of buildings and the loads generated on RC walls. The results from finite element analysis of a severely damaged RC wall in Christchurch highlighted the effect that the floor diaphragms have on the distribution of shear stains in the wall.

Research papers, The University of Auckland Library

The Manchester Courts building was a heritage building located in central Christchurch (New Zealand) that was damaged in the Mw 7.1 Darfield earthquake on 4 September 2010 and subsequently demolished as a risk reduction exercise. Because the building was heritage listed, the decision to demolish the building resulted in strong objections from heritage supporters who were of the opinion that the building had sufficient residual strength to survive possible aftershock earthquakes. On 22 February 2011 Christchurch was struck by a severe aftershock, leading to the question of whether building demolition had proven to be the correct risk reduction strategy. Finite element analysis was used to undertake a performance-based assessment, validating the accuracy of the model using the damage observed in the building before its collapse. In addition, soil-structure interaction was introduced into the research due to the comparatively low shear wave velocity of the soil. The demolition of a landmark heritage building was a tragedy that Christchurch will never recover from, but the decision was made considering safety, societal, economic and psychological aspects in order to protect the city and its citizens. The analytical results suggest that the Manchester Courts building would have collapsed during the 2011 Christchurch earthquake, and that the collapse of the building would have resulted in significant fatalities.

Images, UC QuakeStudies

A photograph of a Christchurch City Council red sticker. The sticker was used by the Civil Defence after the 2010 and 2011 earthquakes to indicate that a building had been inspected and that serious structural damage had been found. The sticker states that there should be no entry to the building. It also states that 'entry may result in death or injury'.

Images, UC QuakeStudies

Damage to buildings along Norwich Quay in Lyttelton. To the left is the Lyttelton Hotel with a crumbled top. Bricks have fallen on the awning and all along the footpath. To the right is a cafe that was damaged severely in the earthquake. The front wall of the top storey has crumbled onto the street, crushing a car. Wire fencing and road cones have been used to create a cordon around the buildings.

Research papers, University of Canterbury Library

Background Liquefaction induced land damage has been identified in more than 13 notable New Zealand earthquakes within the past 150 years, as presented on the timeline below. Following the 2010-2011 Canterbury Earthquake Sequence (CES), the consequences of liquefaction were witnessed first-hand in the city of Christchurch and as a result the demand for understanding this phenomenon was heightened. Government, local councils, insurers and many other stakeholders are now looking to research and understand their exposure to this natural hazard.

Research papers, The University of Auckland Library

Five years after the devastating series of earthquakes in Christchurch, New Zealand, the structural engineering community is now focussing on low damage design by either proactively reducing the possibility of significant damage to primary steel members (i.e. developing seismic resisting systems that will deliver a high damage threshold in severe earthquakes) or by improved detailing of the primary steel members for rapid replacement. This paper presents a development of Eccentrically Braced Frames (EBFs) with replaceable active links. It uses the bolted flange- and web splicing concept to connect the active link to the collector beam or column. Finite element analyses have been performed to investigate the behaviour and reliability of EBFs with this new type replaceable active link. The results show a stable hysteretic behaviour and more significantly easier replacement of the damaged active link in comparison with conventional EBFs.

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

Civil Defence staff conferring at their headquarters in the Christchurch Art Gallery during the immediate aftermath of the 22 February earthquake. On the back wall maps of the city on which areas of importance have been marked with stickers and marker pens can be seen.

Images, UC QuakeStudies

A photograph of volunteers from the Wellington Emergency Management Office being photographed in front of a truck. The volunteers are preparing to travel to Christchurch to help out after the 22 February 2011 earthquake. In the background is the Wellington Emergency Management Office building.

Images, UC QuakeStudies

A photograph of members of the Wellington Emergency Management Office at a graduation ceremony in the Wellington Town Hall. The volunteers were awarded certificates of appreciation at the ceremony, for their work in the emergency response to the 22 February 2011 earthquake in Christchurch.

Images, UC QuakeStudies

A photograph of a portable shower unit set up in Hagley Park for the emergency management personnel who travelled to Christchurch after the 22 February 2011 earthquake. A clothes line has been set up by tying ropes to the shower unit and a digger.

Images, UC QuakeStudies

A Transfield Services worker entering a manhole in north-east Christchurch. Piles of liquefaction are around the man hole. In the background, is one of the portable toilets set up after the 22 February 2011 earthquake to service areas of the city without operational sewers.

Images, UC QuakeStudies

A photograph of volunteers from the Wellington Emergency Management Office being photographed in front of a truck. The volunteers are preparing to travel to Christchurch to help out after the 22 February 2011 earthquake. In the background is the Wellington Emergency Management Office building.

Images, UC QuakeStudies

A photograph of volunteers from the Wellington Emergency Management Office being photographed in front of a truck. The volunteers are preparing to travel to Christchurch to help out after the 22 February 2011 earthquake. In the background is the Wellington Emergency Management Office building.

Images, UC QuakeStudies

A photograph of members of the Wellington Emergency Management Office at a graduation ceremony in the Wellington Town Hall. The volunteers were awarded certificates of appreciation at the ceremony, for their work in the emergency response to the 22 February 2011 earthquake in Christchurch.

Articles, UC QuakeStudies

An article from the Media Studies Journal of Aotearoa New Zealand Volume 14, Number 1. The article is titled, "Heroic Radio: a study of radio responses in the immediate aftermath of the September 2010 Earthquake in Christchurch, New Zealand". It was written by Ruth Zanker.

Images, UC QuakeStudies

An image from a Army News March 2011 article titled, "An Army Being Led to Win". The image shows Defence Force personnel during an operational tour of Lyttelton taken by Commander Joint Forces, Air Marshal Peter Stockwell and Chief of Army Tim Keating to view the aftermath of the Christchurch Earthquake. In the background, the HMNZS Canterbury can be seen.

Images, UC QuakeStudies

For the first time in November 2011, Christchurch residents finally had the opportunity to see the earthquake-damaged city centre on the Red Zone bus tours organised by CERA. The podium which formerly held the Godley statue. Behind is the Regent Theatre dome which has been removed from the building.