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Images for 2011 New Zealand 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

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, The University of Auckland Library

Between September 4, 2010 and December 23, 2011, a series of earthquakes struck the South Island of New Zealand including the city of Christchurch producing heavy damage. During the strongest shaking, the unreinforced masonry (URM) building stock in Christchurch was subjected to seismic loading equal to approximately 150-200% of code values. Post-earthquake reconnaissance suggested numerous failures of adhesive anchors used for retrofit connection of roof and floor diaphragms to masonry walls. A team of researchers from the Universities of Auckland (NZ) and Minnesota (USA) conducted a field investigation on the performance of new adhesive anchors installed in existing masonry walls. Variables included adhesive type, anchor diameter, embedment length, anchor inclination, and masonry quality. Buildings were selected that had been slated for demolition but which featured exterior walls that had not been damaged. A summary of the deformation response measured during the field tests are presented. AM - Accepted Manuscript

Images, UC QuakeStudies

A photograph of signs on the windows of the Christchurch Art Gallery. The art gallery was used as the temporary Civil Defence headquarters after the 22 February 2011 earthquake. The signs read, "Today is Thursday 3 March 2011" and "Wash your hands!". In the background, emergency management personnel and a New Zealand Fire Service truck can be seen.

Research papers, The University of Auckland Library

Following the 2010/2011 Canterbury earthquakes the seismic design of buildings with precast concrete panels has received significant attention. Although this form of construction generally performed adequately in Christchurch, there were a considerable number of precast concrete panel connection failures. This observation prompted a review of more than 4700 panel details from 108 buildings to establish representative details used in both existing and new multi-storey and low rise industrial precast concrete buildings in three major New Zealand cities of Auckland, Wellington and Christchurch. Details were collected from precast manufacturers and city councils and were categorised according to type. The detailing and quantity of each reviewed connection type in the sampled data is reported, and advantages and potential deficiencies of each connection type are discussed. The results of this survey provide a better understanding of the relative prevalence of common detailing used in precast concrete panels and guidance for the design of future experimental studies. http://www.nzsee.org.nz/publications/nzsee-quarterly-bulletin/

Images, UC QuakeStudies

A police officer directing traffic on the intersection of Worcester and Montreal Streets shortly after the 22 February 2011 earthquake. People can be seen on either side of the street, attempting to exit town and make their way home.

Research papers, The University of Auckland Library

Soil Liquefaction during Recent Large-Scale Earthquakes contains selected papers presented at the New Zealand – Japan Workshop on Soil Liquefaction during Recent Large-Scale Earthquakes (Auckland, New Zealand, 2-3 December 2013). The 2010-2011 Canterbury earthquakes in New Zealand and the 2011 off the Pacific Coast of Tohoku Earthquake in Japan have caused significant damage to many residential houses due to varying degrees of soil liquefaction over a very wide extent of urban areas unseen in past destructive earthquakes. While soil liquefaction occurred in naturally-sedimented soil formations in Christchurch, most of the areas which liquefied in Tokyo Bay area were reclaimed soil and artificial fill deposits, thus providing researchers with a wide range of soil deposits to characterize soil and site response to large-scale earthquake shaking. Although these earthquakes in New Zealand and Japan caused extensive damage to life and property, they also serve as an opportunity to understand better the response of soil and building foundations to such large-scale earthquake shaking. With the wealth of information obtained in the aftermath of both earthquakes, information-sharing and knowledge-exchange are vital in arriving at liquefaction-proof urban areas in both countries. Data regarding the observed damage to residential houses as well as the lessons learnt are essential for the rebuilding efforts in the coming years and in mitigating buildings located in regions with high liquefaction potential. As part of the MBIE-JSPS collaborative research programme, the Geomechanics Group of the University of Auckland and the Geotechnical Engineering Laboratory of the University of Tokyo co-hosted the workshop to bring together researchers to review the findings and observations from recent large-scale earthquakes related to soil liquefaction and discuss possible measures to mitigate future damage. http://librarysearch.auckland.ac.nz/UOA2_A:Combined_Local:uoa_alma21151785130002091

Images, UC QuakeStudies

Prime Minister John Key talking to Al Dwyer, the leader of the Disaster Assistance Response Team (DART), outside the US headquarters in Latimer Square. John Key is visiting to thank DART for their efforts in the aftermath of the 22 February 2011 earthquake.

Images, UC QuakeStudies

Prime Minister John Key talking to Al Dwyer, the leader of the Disaster Assistance Response Team (DART), outside the US headquarters in Latimer Square. John Key is visiting to thank DART for their efforts in the aftermath of the 22 February 2011 earthquake.

Images, UC QuakeStudies

A view across Battersea Street in Sydenham to Churchill's Tavern, which has been badly damaged in the 22 February 2011 earthquake. Masonry from the building's top storey has collapsed onto the footpath and several of its windows have fallen out. A member of the New Zealand Police Force is walking across Colombo Street in the background.

Images, UC QuakeStudies

Al Dwyer, leader of the USAID Disaster Assistance Response Team (DART), outside the US headquarters in Latimer Square. Members of DART can be seen behind him. Latimer Square was set up as a temporary headquarters for emergency management personnel after the 22 February 2011 earthquake.

Images, UC QuakeStudies

Prime Minister John Key talking to Al Dwyer, and members of the USAID Disaster Assistance Response Team (DART) outside the US headquarters in Latimer Square. John Key is visiting to thank DART for their efforts in the aftermath of the 22 February 2011 earthquake.

Images, UC QuakeStudies

Prime Minister John Key talking to Al Dwyer, and members of the USAID Disaster Assistance Response Team (DART) outside the US headquarters in Latimer Square. John Key is visiting to thank DART for their efforts in the aftermath of the 22 February 2011 earthquake.

Images, UC QuakeStudies

Prime Minister John Key talking to Al Dwyer, and members of the USAID Disaster Assistance Response Team (DART) outside the US headquarters in Latimer Square. John Key is visiting to thank DART for their efforts in the aftermath of the 22 February 2011 earthquake.

Research papers, The University of Auckland Library

The 2011, 6.3 magnitude Christchurch earthquake in New Zealand caused considerable structural damage. It is believed that this event has now resulted in demolition of about 65-70% of the building stock in the Central Business District (CBD), significantly crippling economic activities in the city of Christchurch. A major concern raised from this event was adequacy of the current seismic design practice adopted for reinforced concrete walls due to their poor performance in modern buildings. The relatively short-duration earthquake motion implied that the observed wall damage occurred in a brittle manner despite adopting a ductile design philosophy. This paper presents the lessons learned from the observed wall damage in the context of current state of knowledge in the following areas: concentrating longitudinal reinforcement in wall end regions; determining wall thickness to prevent out-of-plane wall buckling; avoiding lap splices in plastic hinge zones; and quantifying minimum vertical reinforcement. http://www.2eceesistanbul.org/

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

Deputy Administrator for Protection and National Preparedness at the Federal Emergency Management Agency, Tim Manning, and Michael Layne from the US Embassy in Wellington, speaking to Ray Kennedy, an Area Manager from the New Zealand Fire Service, in the Christchurch Art Gallery about the 22 February 2011 earthquake.

Images, UC QuakeStudies

A member of the Fire Service entering the Forsyth Barr building through a window in order to check for people trapped by the 22 February 2011 earthquake. A sign reading, "Help" has been stuck to one of the windows and a window above has already been broken by the team.

Research papers, The University of Auckland Library

The Christchurch region of New Zealand experienced a series of major earthquakes and aftershocks between September 2010 and June 2011 which caused severe damage to the city’s infrastructure. The performance of tilt-up precast concrete buildings was investigated and initial observations are presented here. In general, tilt-up buildings performed well during all three major earthquakes, with mostly only minor, repairable damage occurring. For the in-plane loading direction, both loadbearing and cladding panels behaved exceptionally well, with no significant damage or failure observed in panels and their connections. A limited number of connection failures occurred due to large out-of-plane panel inertia forces. In several buildings, the connections between the panel and the internal structural frame appeared to be the weakest link, lacking in both strength and ductility. This weakness in the out-of-plane load path should be prevented in future designs.

Research papers, University of Canterbury Library

Liquefaction-induced lateral spreading during earthquakes poses a significant hazard to the built environment, as observed in Christchurch during the 2010 to 2011 Canterbury Earthquake Sequence (CES). It is critical that geotechnical earthquake engineers are able to adequately predict both the spatial extent of lateral spreads and magnitudes of associated ground movements for design purposes. Published empirical and semi-empirical models for predicting lateral spread displacements have been shown to vary by a factor of <0.5 to >2 from those measured in parts of Christchurch during CES. Comprehensive post- CES lateral spreading studies have clearly indicated that the spatial distribution of the horizontal displacements and extent of lateral spreading along the Avon River in eastern Christchurch were strongly influenced by geologic, stratigraphic and topographic features.

Images, UC QuakeStudies

Members of the USAID Disaster Assistance Response Team (DART) and the New Zealand Urban Search and Rescue Team conferring in a tent full of equipment in Latimer Square. Latimer Square was set up as a temporary headquarters for emergency management personnel after the 22 February 2011 earthquake.

Images, UC QuakeStudies

Prime Minister John Key shaking the hand of the Al Dwyer, the leader of the USAID Disaster Assistance Response Team (DART) outside the US headquarters in Latimer Square. John Key is visiting to thank DART for their efforts in the aftermath of the 22 February 2011 earthquake.

Images, UC QuakeStudies

A member of the Fire Service using an axe to break one of the Forsyth Barr building's windows in order to check for people trapped by the 22 February 2011 earthquake. A sign reading, "Help" has been stuck to one of the windows and a window above has already been broken by the team.

Images, UC QuakeStudies

A member of the Fire Service using an axe to break one of the Forsyth Barr building's windows in order to check for people trapped by the 22 February 2011 earthquake. A sign reading, "Help" has been stuck to one of the windows and a window above has already been broken by the team.

Images, UC QuakeStudies

A team of Fire Service and Search and Rescue personnel using a crane to check the Forsyth Barr building for people trapped by the 22 February 2011 earthquake. A sign reading, "Help" has been stuck to one of the windows and a window above has already been broken by the team.

Images, UC QuakeStudies

Prime Minister John Key preparing for a photograph with Al Dwyer, the leader of the USAID Disaster Assistance Response Team (DART), and members of DART, outside the US headquarters in Latimer Square. Latimer Square was set up as a temporary headquarters for emergency managements personnel after the 22 February 2011 earthquake.

Images, UC QuakeStudies

A photograph of the earthquake damage to a building on Hereford Street. A column on the right side of the building has snapped and the side wall has pulled away from the building. USAR codes have been spray-painted on one of the windows on the bottom storey. In the foreground there is a police car.

Images, UC QuakeStudies

Prime Minister John Key preparing for a photograph with Al Dwyer, leader of the Disaster Assistance Response Team (DART), and members of DART, outside the US headquarters in Latimer Square. Latimer Square was set up as a temporary headquarters for emergency managements personnel after the 22 February 2011 earthquake.