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Research papers, University of Canterbury Library

This thesis focuses attention on the ongoing effects of the earthquakes on children in Christchurch. It identifies the learning and behavioural difficulties evident in an increasing number of students and cautions the use of the word 'resilient' to describe children who may be just managing. This assumption has a significant impact on the wellbeing of many Christchurch children who, disaster literature warns, are likely to be under-served. This thesis suggests that, because of the scale of need, schools are the best place to introduce practices that will foster wellbeing. Mindfulness practices are identified as a potential tool for ameliorating the vulnerabilities experienced by children, while at the same time working to increase their capabilities. This thesis argues that, through mindful practices, children can learn to be more reflective of their emotions and respond in more considered ways to different situations. They can become more relational, having a greater understanding of others through a deeper understanding of themselves, and they can build resilience by developing the protective factors that promote more adaptive functioning. This thesis identifies the strong links between mindfulness and the holistic wellbeing concept of Te Whare Tapa Whã and a Mãori worldview. Strong links are also identified with the vision, values and key competencies of the New Zealand Curriculum and 21st Century learners. Both short and long term recommendations are made for the introduction of mindfulness practices in schools to enhance the wellbeing of children.  

Research papers, University of Canterbury Library

Cities need places that contribute to quality of life, places that support social interaction. Wellbeing, specifically, community wellbeing, is influenced by where people live, the quality of place is important and who they connect with socially. Social interaction and connection can come from the routine involvement with others, the behavioural acts of seeing and being with others. This research consisted of 38 interviews of residents of Christchurch, New Zealand, in the years following the 2010-12 earthquakes. Residents were asked about the place they lived and their interactions within their community. The aim was to examine the role of neighbourhood in contributing to local social connections and networks that contribute to living well. Specifically, it focused on the role and importance of social infrastructure in facilitating less formal social interactions in local neighbourhoods. It found that neighbourhood gathering places and bumping spaces can provide benefit for living well. Social infrastructure, like libraries, parks, primary schools, and pubs are some of the places of neighbourhood that contributed to how well people can encounter others for social interaction. In addition, unplanned interactions were facilitated by the existence of bumping places, such as street furniture. The wellbeing value of such spaces needs to be acknowledged and factored into planning decisions, and local rules and regulations need to allow the development of such spaces.

Research papers, University of Canterbury Library

Major earthquakes, such as the Canterbury and Kaikoura events recorded in New Zealand in 2010 and 2016 respectively, highlighted that floor systems can be heavily damaged. At a reduced or full scale, quasi-static experimental tests on structural sub-assemblies can help to establish the seismic performance of structural systems. However, the experimental performance obtained with such tests is likely to be dependent on the drift protocol adopted. This paper provides an overview of the drift protocols which have been assumed in previous relevant experimental activities, with emphasis on those adopted for testing floor systems. The paper also describes the procedure used to define the loading protocol applied in the testing of a large precast concrete floor diaphragm as part of the Recast floor project at the University of Canterbury. Finally, major limits of current loading protocols, and areas of future research, are identified.

Research papers, University of Canterbury Library

New Zealand has a long tradition of using light timber frame for construction of its domestic dwellings. After the most recent earthquakes (e.g. Canterbury earthquakes sequence), wooden residential houses showed satisfactory life safety performance which aligns with New Zealand design codes requirements. However, poor performance was reported in terms of their seismic resilience that can be generally associated with community demands. Future expectations of the seismic performance of wooden-framed houses by homeowners were assessed in this research. Homeowners in the Wellington region were asked in a survey about the levels of safety and expected possible damage in their houses after a seismic event. Findings bring questions about whether New Zealand code requirements are good enough to satisfy community demands. Also, questions whether available information of strengthening techniques to structurally prepare wooden-framed houses to face future major earthquakes can help to make homeowners feel safer at home during major seismic events.

Images, Alexander Turnbull Library

A small boy is being a real entrepreneur after the Christchurch earthquake of 22 February 2011 and has set up a road-side stall from which you can buy a bag of 'real leakyfakshun'. Behind him is a pile of liquefaction and a spade with which he can fill bags. Context - the Christchurch earthquake of 22 February has caused vastly more liquefaction than the original 4th September earthquake. The vibrations from the quake cause liquefaction which is where the soil loses strength and stiffness, and behaves more like a liquid than a solid - rather like wet sand. Colour and black and white versions available Quantity: 2 digital cartoon(s).

Images, Alexander Turnbull Library

A policeman and his dog stop outside a house wrecked in the Christchurch earthquake and phone for assistance saying 'Have found signs of low-life' because he can see 'Christchurch looting in progress'. Context - on 22 February 2011 a 6.3 magnitude earthquake struck in Christchurch, which has probably killed more than 200 people (at this point the number is still not known) and caused very severe damage. The courage, generosity and 'can do' attitude of the people has been wonderful apart from the antisocial behaviour of a few looters and others taking advantage of the situation. Quantity: 1 digital cartoon(s).

Images, Alexander Turnbull Library

In the first of two frames which represents 'now' is a row of houses in the bay; two old-style character villas flank a modern house built to look like a boat and someone inside the modern house says proudly that they 'built here because of the character of the bays'. In the second frame which represents 'soon' all of the houses have taken on the character of the modern house and someone from the original modern house can't put their finger on why they feel that 'It's not the same somehow'. Quantity: 1 digital cartoon(s).

Research papers, Lincoln University

Modern cities are surprisingly dependent on tourism and competition among them for tourist dollars—both domestically and internationally—can be extreme. New Zealand’s second city, Christchurch, is no exception. In 2009, tourism reportedly earned $2.3 billion and accounted for more than 12 per cent of the region’s employment. Then came a series of devastating earthquakes that claimed 185 lives and decimated the city’s infrastructure. More than 10,000 earthquakes and aftershocks have radically altered Christchurch’s status as a tourism destination. Two years on, what is being done to recover from one of the world’s largest natural disasters? Can the “Garden City” reassert itself as a highly-desirable Australasian destination with a strong competitive advantage over rivals that have not been the target of natural disasters.

Images, UC QuakeStudies

A photograph of a dusty monitor in an earthquake-damaged building on Poplar Street taken during the Residential Access Project. The Residential Access Project gave residents temporary access within the red-zone cordon in order to retrieve items from their homes after the 22 February 2011 earthquake. Dislodged bricks can also be seen around the monitor.

Audio, Radio New Zealand

Highlights from Radio New Zealand National's programmes for the week ending Friday 8 October. This week.....Canterbury marks a month since its earthquake, a co-producer of The Hobbit speaks out about union activity threatening the film's production in New Zealand, can the Commonwealth Games media stomach Delhi, Michael Caine talks about his new autobiography and we get the lowdown on whitebait.

Audio, Radio New Zealand

After the devastating effects on Christchurch, we are all aware of the damage earthquakes can cause. But in New Zealand, a tsunami could be just as damaging. University of Auckland engineers Asaad Shamseldin and PhD student Reza Shafiei are creating waves in the lab to work out how safe our buildings are, if a tsunami hits. Ruth Beran goes to visit them.

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Christchurch Earthquake. Christchurch was rocked by a large aftershock shortly after 8am this morning. Linemen cutting power to a damaged line outside an old historic building on the corner of Montreal Street and Moorhouse Avenue which will have work done to it to try and save as much as they can".

Images, UC QuakeStudies

A digger being loaded onto the back of a truck. The photographer comments, "After clearing away the remains of a building in Christchurch, New Zealand destroyed by the February 22 earthquake the digger can now be transported to its next destination for destruction".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Christchurch Earthquake. Christchurch was rocked by a large aftershock shortly before 8am this morning. Linemen cutting power to a damaged line outside an old historic building on the corner of Montreal Street and Moorhouse Avenue which will have work done to it to try and save as much as they can".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Christchurch Earthquake. Christchurch was rocked by a large aftershock shortly after 8am this morning. Linemen cutting power to a damaged line outside an old historic building on the corner of Montreal Street and Moorhouse Avenue which will have work done to it to try and save as much as they can".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Christchurch Earthquake. Christchurch was rocked by a large aftershock shortly after 8am this morning. Linemen cutting power to a damaged line outside an old historic building on the corner of Montreal Street and Moorhouse Avenue which will have work done to it to try and save as much as they can".

Images, eqnz.chch.2010

Closeup of the Grand Chancellor showing the south eastern corner, which is where it has slumped and broken and is now leaning in that direction. I note that they have taken some equipment out of the roof, you can see daylight through the gaps on the other side. The broken windows are also clearly visible with curtains hanging in some of them. ...

Research papers, University of Canterbury Library

This thesis studies the behaviour of diaphragms in multi-storey timber buildings by providing methods for the estimation of the diaphragm force demand, developing an Equivalent Truss Method for the analysis of timber diaphragms, and experimentally investigating the effects of displacement incompatibilities between the diaphragm and the lateral load resisting system and developing methods for their mitigation. The need to better understand the behaviour of diaphragms in timber buildings was highlighted by the recent 2010-2011 Canterbury Earthquake series, where a number of diaphragms in traditional concrete buildings performed poorly, compromising the lateral load resistance of the structure. Although shortcomings in the estimation of force demand, and in the analysis and design of concrete floor diaphragms have already been partially addressed by other researchers, the behaviour of diaphragms in modern multi-storey timber buildings in general, and in low damage Pres-Lam buildings (consisting of post-tensioned timber members) in particular is still unknown. The recent demand of mid-rise commercial timber buildings of ten storeys and beyond has further highlighted the lack of appropriate methods to analyse timber diaphragms with irregular floor geometries and large spans made of both light timber framing and massive timber panels. Due to the lower stiffness of timber lateral load resisting systems, compared with traditional construction materials, and the addition of in-plane flexible diaphragms, the effect of higher modes on the global dynamic behaviour of a structure becomes more critical. The results from a parametric non-linear time-history analysis on a series of timber frame and wall structures showed increased storey shear and moment demands even for four storey structures when compared to simplistic equivalent static analysis. This effect could successfully be predicted with methods available in literature. The presence of diaphragm flexibility increased diaphragm inter-storey drifts and the peak diaphragm demand in stiff wall structures, but had less influence on the storey shears and moments. Diaphragm force demands proved to be significantly higher than the forces derived from equivalent static analysis, leading to potentially unsafe designs. It is suggested to design all diaphragms for the same peak demand; a simplified approach to estimate these diaphragm forces is proposed for both frame and wall structures. Modern architecture often requires complex floor geometries with long spans leading to stress concentrations, high force demands and potentially large deformations in the diaphragms. There is a lack of guidance and regulation regarding the analysis and design of timber diaphragms and a practical alternative to the simplistic equivalent deep beam analysis or costly finite element modelling is required. An Equivalent Truss Method for the analysis of both light timber framed and massive timber diaphragms is proposed, based on analytical formulations and verified against finite element models. With this method the panel unit shear forces (shear flow) and therefore the fastener demand, chord forces and reaction forces can be evaluated. Because the panel stiffness and fastener stiffness are accounted for, diaphragm deflection, torsional effects and transfer forces can also be assessed. The proposed analysis method is intuitive and can be used with basic analysis software. If required, it can easily be adapted for the use with diaphragms working in the non-linear range. Damage to floor diaphragms resulting from displacement incompatibilities due to frame elongation or out-of plane deformation of walls can compromise the transfer of inertial forces to the lateral load resisting system as well as the stability of other structural elements. Two post-tensioned timber frame structures under quasi-static cyclic and dynamic load, respectively, were tested with different diaphragm panel layouts and connections investigating their ability to accommodate frame elongations. Additionally, a post-tensioned timber wall was loaded under horizontal cyclic loads through two pairs of collector beams. Several different connection details between the wall and the beams were tested, and no damage to the collector beams or connections was observed in any of the tests. To evaluate the increased strength and stiffness due to the wall-beam interaction an analytical procedure is presented. Finally, a timber staircase core was tested under bi-directional loading. Different connection details were used to study the effect of displacement incompatibilities between the orthogonal collector beams. These experiments showed that floor damage due to displacement incompatibilities can be prevented, even with high levels of lateral drift, by the flexibility of well-designed connections and the flexibility of the timber elements. It can be concluded that the flexibility of timber members and the flexibility of their connections play a major role in the behaviour of timber buildings in general and of diaphragms specifically under seismic loads. The increased flexibility enhances higher mode effects and alters the diaphragm force demand. Simple methods are provided to account for this effect on the storey shear, moment and drift demands as well as the diaphragm force demands. The analysis of light timber framing and massive timber diaphragms can be successfully analysed with an Equivalent Truss Method, which is calibrated by accounting for the panel shear and fastener stiffnesses. Finally, displacement incompatibilities in frame and wall structures can be accommodated by the flexibilities of the diaphragm panels and relative connections. A design recommendations chapter summarizes all findings and allows a designer to estimate diaphragm forces, to analyse the force path in timber diaphragms and to detail the connections to allow for displacement incompatibilities in multi-storey timber buildings.

Research papers, University of Canterbury Library

Recently developed performance-based earthquake engineering framework, such as one provided by PEER (Deierlein et al. 2003), assist in the quantification in terms of performance such as casualty, monetary losses and downtime. This opens up the opportunity to identify cost-effective retrofit/rehabilitation strategies by comparing upfront costs associated with retrofit with the repair costs that can be expected over time. This loss assessment can be strengthened by learning from recent earthquakes, such as the 2010 Canterbury and 2016 Kaikoura earthquakes. In order to investigate which types of retrofit/rehabilitation strategies may be most cost-effective, a case study building was chosen for this research. The Pacific Tower, a 22-storey EBF apartment located within the Christchurch central business district (CBD), was damaged and repaired during the 2010 Canterbury earthquake series. As such, by taking hazard levels accordingly (i.e. to correspond to the Christchurch CBD), modelling and analysing the structure, and considering the vulnerability and repair costs of its different components, it is possible to predict the expected losses of the aforementioned building. Using this information, cost-effective retrofit/rehabilitation strategy can be determined. This research found that more often than not, it would be beneficial to improve the performance of valuable non-structural components, such as partitions. Although it is true that improving such elements will increase the initial costs, over time, the benefits gained from reduced losses should be expected to overcome the initial costs. Aftershocks do increase the predicted losses of a building even in lower intensities due to the fact that non-structural components can get damaged at such low intensities. By comparing losses computed with and without consideration of aftershocks for a range of historical earthquakes, it was found that the ratio between losses due to main shock with aftershocks to the losses due to the main shock only tended to increase with increasing main shock magnitude. This may be due to the fact that larger magnitude earthquakes tend to generate larger magnitude aftershocks and as those aftershocks happen within a region around the main shock, they are more likely to cause intense shaking and additional damage. In addition to this observation, it was observed that the most significant component of loss of the case study building was the non-structural partition walls.

Research papers, University of Canterbury Library

Researchers have begun to explore the opportunity presented by blue-green infrastructure(a subset of nature-based solutions that provide blue and green space in urban infrastructure)as a response to the pressures of climate change. The 2010/2011 Canterbury earthquake sequence created a unique landscape within which there is opportunity to experiment with and invest in new solutions to climate change adaptation in urban centres. Constructed wetlands are an example of blue-green infrastructure that can potentially support resilience in urban communities. This research explores interactions between communities and constructed wetlands to understand how this may influence perceptions of community resilience. The regeneration of the Ōtākaro Avon River Corridor (OARC) provides a space to investigate these relationships. Seven stakeholders from the community, industry, and academia, each with experience in blue-green infrastructure in the OARC, participated in a series of semi-structured interviews. Each participant was given the opportunity to reflect on their perspectives of community, community resilience, and constructed wetlands and their interconnections. Interview questions aligned with the overarching research objectives to (1) understand perceptions around the role of wetlands in urban communities, (2) develop a definition for community resilience in the context of the Ōtākaro Avon community, and (3) reflect on how wetlands can contribute to (or detract from) community resilience. This study found that constructed wetlands can facilitate learning about the challenges and solutions needed to adapt to climate change. From the perspective of the community representatives, community resilience is linked to social capital. Strong social networks and a relationship with nature were emphasised as core components of a community’s ability to adapt to disruption. Constructed wetlands are therefore recognised as potentially contributing to community resilience by providing spaces for people to engage with each other and nature. Investment in constructed wetlands can support a wider response to climate change impacts. This research was undertaken with the support of the Ōtākaro Living Laboratory Trust, who are invested in the future of the OARC. The outcomes of this study suggest that there is an opportunity to use wetland spaces to establish programmes that explore the perceptions of constructed wetlands from a broader community definition, at each stage of the wetland life cycle, and at wider scales(e.g., at a city scale or beyond).

Images, UC QuakeStudies

A photograph of Brandon, Elizabeth Ackerman and Danica Nel on the site of a demolished building on Tuam Street. The trio can be seen wearing hard hats and florescent vests. The photograph was taken during the Residential Access Project which gave residents temporary access within the red-zone cordon in order to retrieve items from their homes after the 22 February 2011 earthquake.

Images, UC QuakeStudies

In collaboration with Melbourne sound artist Malcolm Riddoch, the original recording has also been turned into an audio work entitled "Body Waves", which accentuates the lower frequency harmonics at a venue to create a piece that goes beyond the auditory system and can be felt in the body. This piece has been performed several times, including in New Zealand, Australia and Slovenia. Listen to it here: https://soundcloud.com/stanier-black-five/body-waves-i

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Proof that one can make a difference. Beth Price (year 7, age 12), a pupil from Hadlow School in Masterton was the instigator and driver for a fundraiser effort for Christchurch's Belfast School to the tune of over $2000 after seeing the damage caused by Christchurch's September 4th earthquake. Beth Price in her school uniform at Belfast School".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Proof that one can make a difference. Beth Price (year 7, age 12), a pupil from Hadlow School in Masterton was the instigator and driver for a fundraiser effort for Christchurch's Belfast School to the tune of over $2000, after seeing the damage caused by Christchurch's September 4th earthquake. Beth Price in her school uniform at Belfast School".

Audio, Radio New Zealand

Shift to quake recovery operation devastating for survivor;Brother of missing woman speaks out;Police say end of rescue effort sad day for all concerned;Other families trying to come to grips with rescue's end;Hundreds struggle on with life inside Christchurch cordon;Christ's College spared from large scale damage;Gang patches can return - Hells Angels lawyer;Botany to elect new MP tomorrow;Earthquake Minister on shift to recovery operation.

Audio, Radio New Zealand

A new research project will study the ongoing impact of "quake brain" on people's memory and other cognitive functions a decade after the Canterbury earthquakes; a Masterton print business that can't find a way to recycle its plastic waste has highlighted a national problem; a programme offering free period products for all school students is to be rolled out nationwide from June; and why don't we eat possum?

Images, UC QuakeStudies

A photograph of Elizabeth Ackerman and Danica Nel standing next to trailer on the site of a demolished building on Tuam Street. The duo can be seen wearing hard hats and florescent vests. The photograph was taken during the Residential Access Project which gave residents temporary access within the red-zone cordon in order to retrieve items from their homes after the 22 February 2011 earthquake.