A video of the panel during the first plenary discussion at the 2016 People in Disasters Conference. The panel is made up of keynote speaker Sir John Holmes and guests David Meates and Arihia Bennett.
A video of the second panel discussion at the 2016 People in Disasters Conference. The panel is made up of keynote speaker Dr Jeanne LeBlanc and guests Dr Penelope Burns and Dr Phil Schroeder.
A video of the panel discussion during the third plenary of the 2016 People in Disasters Conference. The panel is made up of keynote speaker Alexander C. McFarlane and guests Ian Campbell and Duncan Webb.
A video of the panel discussion during the fifth plenary of the 2016 People in Disasters Conference. The panel is made up of keynote speaker Professor Jonathan Davidson, and guests Associate Professor John Vargo and Associate Professor Sarbjit Johal.
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/
A video of a presentation by Antony Gough, New Zealand property developer, during a panel at the 2016 Seismics in the City Conference. The panel has three themes:A City on the Move: Collaboration and Regeneration: "'Christchurch is now moving rapidly from the recovery phase into a regeneration stage with Central and Local Government working with the wider community, including the business community to ensure we get optimal outcomes for greater Christchurch' (CECC)."Looking Back: Remembering and Learning: "What are the milestones? What are the millstones? What have we learnt? What have we applied?"Looking Forward: Visioning and Building: "What do we aspire to? What are the roadblocks? What is the way forward?"
A video of André Lovatt, Chair of Regenerate Christchurch, Hugh Cowan, General Manager of Reinsurance, Research and Education at EQC, and developer Antony Gough responding to questions from the floor during a panel at the 2016 Seismics in the City Conference. The panel has three themes:A City on the Move: Collaboration and Regeneration: "'Christchurch is now moving rapidly from the recovery phase into a regeneration stage with Central and Local Government working with the wider community, including the business community to ensure we get optimal outcomes for greater Christchurch' (CECC)."Looking Back: Remembering and Learning: "What are the milestones? What are the millstones? What have we learnt? What have we applied?"Looking Forward: Visioning and Building: "What do we aspire to? What are the roadblocks? What is the way forward?"
A video of Hon. Nicky Wagner, Associate Minister for Canterbury Earthquake Recovery, Hon. Lianne Dalziel, Mayor of Christchurch, and Peter Townsend, CEO of the Canterbury Employers' Chamber of Commerce, responding to questions from the floor during a panel at the 2016 Seismics in the City Conference. The panel has three themes:A City on the Move: Collaboration and Regeneration: "'Christchurch is now moving rapidly from the recovery phase into a regeneration stage with Central and Local Government working with the wider community, including the business community to ensure we get optimal outcomes for greater Christchurch' (CECC)."Looking Back: Remembering and Learning: "What are the milestones? What are the millstones? What have we learnt? What have we applied?"Looking Forward: Visioning and Building: "What do we aspire to? What are the roadblocks? What is the way forward?"
A video of a presentation by André Lovatt, Chair of Regenerate Christchurch, during a panel at the 2016 Seismics in the City Conference. The panel has three themes:A City on the Move: Collaboration and Regeneration: "'Christchurch is now moving rapidly from the recovery phase into a regeneration stage with Central and Local Government working with the wider community, including the business community to ensure we get optimal outcomes for greater Christchurch' (CECC)."Looking Back: Remembering and Learning: "What are the milestones? What are the millstones? What have we learnt? What have we applied?"Looking Forward: Visioning and Building: "What do we aspire to? What are the roadblocks? What is the way forward?"
A video of a presentation by Hugh Cowan, General Manager of Reinsurance, Research and Education at EQC, during a panel at the 2016 Seismics in the City Conference. The panel has three themes:A City on the Move: Collaboration and Regeneration: "'Christchurch is now moving rapidly from the recovery phase into a regeneration stage with Central and Local Government working with the wider community, including the business community to ensure we get optimal outcomes for greater Christchurch' (CECC)."Looking Back: Remembering and Learning: "What are the milestones? What are the millstones? What have we learnt? What have we applied?"Looking Forward: Visioning and Building: "What do we aspire to? What are the roadblocks? What is the way forward?"
A video of a presentation by Peter Townsend, CEO of the Canterbury Employers' Chamber of Commerce, during a panel at the 2016 Seismics in the City Conference. The panel has three themes:A City on the Move: Collaboration and Regeneration: "'Christchurch is now moving rapidly from the recovery phase into a regeneration stage with Central and Local Government working with the wider community, including the business community to ensure we get optimal outcomes for greater Christchurch' (CECC)."Looking Back: Remembering and Learning: "What are the milestones? What are the millstones? What have we learnt? What have we applied?"Looking Forward: Visioning and Building: "What do we aspire to? What are the roadblocks? What is the way forward?"
A video of a presentation by Hon. Lianne Dalziel, Mayor of Christchurch, during a panel at the 2016 Seismics in the City Conference. The panel has three themes:A City on the Move: Collaboration and Regeneration: "'Christchurch is now moving rapidly from the recovery phase into a regeneration stage with Central and Local Government working with the wider community, including the business community to ensure we get optimal outcomes for greater Christchurch' (CECC)."Looking Back: Remembering and Learning: "What are the milestones? What are the millstones? What have we learnt? What have we applied?"Looking Forward: Visioning and Building: "What do we aspire to? What are the roadblocks? What is the way forward?"
A video of a presentation by Hon. Nicky Wagner, Associate Minister for Canterbury Earthquake Recovery, during a panel at the 2016 Seismics in the City Conference. The panel has three themes:A City on the Move: Collaboration and Regeneration: "'Christchurch is now moving rapidly from the recovery phase into a regeneration stage with Central and Local Government working with the wider community, including the business community to ensure we get optimal outcomes for greater Christchurch' (CECC)."Looking Back: Remembering and Learning: "What are the milestones? What are the millstones? What have we learnt? What have we applied?"Looking Forward: Visioning and Building: "What do we aspire to? What are the roadblocks? What is the way forward?"
Billy Kristian of The Invaders shares his memories of Ray Columbus who has died at the age of 74. Islay Marsden of the University of Canterbury discusses what clearing rocks and silt from quake-induced landslides will do to the coastal environment. Kevin Furlong of Penn State University discusses the connection between the earthquakes and various faultline systems.
The Cathedral has been in a state of limbo since the Christchurch earthquakes. Now roosting pigeons are adding to the damage.
Academics have done some number crunching and decided where 10, 000 words sit on a happiness index. What the Panelists Tim Watkin and Selwyn Manning have been thinking about. Ros Rowe of the Leg Up Trust talks about funding cuts which are affecting her horse therapy business which helps disadvantaged young people. The Cathedral has been in a state of limbo since the Christchurch earthquakes. Now roosting pigeons are adding to the damage. Are you keen on the Pokemon Go craze? Pakistani social media celebrity Qandeel Baloch has been killed by her brother in a so-called honour killing.
Ang Jury of Womens' Refuge talks about the announced changes to family violence law and if the government's got it right. Labour's Andrew Little "rejected" yesterday's One News Colmar Brunton Poll so the party released its own results today. Bruce Springsteen has announced dates for a New Zealand tour including a concert in Christchurch for the anniversary of the February 2011 earthquake. Your feedback about the long hours hospital doctors work.
Bruce Springsteen has announced dates for a New Zealand tour including a concert in Christchurch for the anniversary of the February 2011 earthquake.
Christchurch City Councillor Ali Jones talks about what the cull of EQC staff will mean for life in the post-earthquake city.
What the Panelists Finlay MacDonald and Peter Fa'afiu have been up to. The Reserve Bank has cut the Official Cash Rate to a record low 2%. Another book about retired All Blacks captain Richie McCaw has come out. The NZ Sevens rugby team is now officially out of medal contention. Are people all that interested in the Olympic games? Fairfax and Sky TV are in court over copyright issues. Christchurch City Councillor Ali Jones talks about what the cull of EQC staff will mean for life in the post-earthquake city.
Should a 150 year-old tree have been cut down to make way for Christchurch's earthquake memorial?
The Christchurch couple told they can't use part of their property because the Canterbury Earthquake Recovery Authority (CERA) might need access to it.
How do we choose who we admire? Sports commentator Lavina Good talks about the latest Australian rugby league player to be caught being lewd. What the Panelists David Farrar and Tony Doe have been thinking about. Lawyer Duncan Webb discusses the criteria for charitable trusts after one set up by the Head Hunters was eventually deregistered. And the Christchurch couple told they can't use part of their property because the Canterbury Earthquake Recovery Authority (CERA) might need access to it.
A video of a panel discussion at the 2016 Seismics in the City Conference. The panel is titled, "Engaging: Generating Community Input and Feedback".Leanne Curtis of Breakthrough Services, Evan Smith, Programme Manager of Eastern Vision, and André Lovatt, CEO of the Arts Centre, present case studies.The theme of the panel reads, "'Regenerate Christchurch must and will engage with the community around what will be done' (André Lovatt, Chair, Regenerate Christchurch). Learning from the past by tapping the wisdom of communities and applying the lessons to the future as we shape the new city."
A video of a panel discussion at the 2016 Seismics in the City Conference. The panel is titled, "Engaging: Generating Community Input and Feedback".Leanne Curtis of Breakthrough Services, Evan Smith, Programme Manager of Eastern Vision, and André Lovatt, CEO of the Arts Centre, respond to questions from the floor. Brendon Burns, of Brendon Burns and Associates, facilitates the discussion.The theme of the panel reads, "'Regenerate Christchurch must and will engage with the community around what will be done' (André Lovatt, Chair, Regenerate Christchurch). Learning from the past by tapping the wisdom of communities and applying the lessons to the future as we shape the new city."
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.
Kim Hill talks to Sam Crofskey, the owner of C1 Espresso in the Christchurch CBD, which reopened in 2012 after the Canterbury earthquakes and will celebrate its twentieth anniversary this year. He spoke on the WORD Christchurch panel, How Are We Doing, Christchurch?, and this week launched Let's Take a Walk, a pop-up book for children about the quakes that he created with his wife Fleur and illustrator Hannah Beehre. He is joined by Joseph Hullen (Ngai Tuahuriri, Ngai Tahu), a hunter gatherer, fisherman, explorer, kaitiaki and storyteller who has spent a lifetime gathering traditional kai and listening to stories about his hapu. He is a whakapapa researcher for Te Runanga o Ngai Tahu, and is leading three sold-out walking tours during WORD Christchurch along the banks of the Otakaro (Avon River), uncovering the city's history.
Predictive modelling provides an efficient means to analyse the coastal environment and generate knowledge for long term urban planning. In this study, the numerical models SWAN and XBeach were incorporated into the ESRI ArcGIS interface by means of the BeachMMtool. This was applied to the Greater Christchurch coastal environment to simulate geomorphological evolution through hydrodynamic forcing. Simulations were performed using the recent sea level rise predictions by the Intergovernmental Panel on Climate Change (2013) to determine whether the statutory requirements outlined in the New Zealand Coastal Policy Statement 2010 are consistent with central, regional and district designations. Our results indicate that current land use zoning in Greater Christchurch is not consistent with these predictions. This is because coastal hazard risk has not been thoroughly quantified during the process of installing the Canterbury Earthquake Recovery Authority residential red zone. However, the Christchurch City Council’s flood management area does provide an extent to which managed coastal retreat is a real option. The results of this research suggest that progradation will continue to occur along the Christchurch foreshore due to the net sediment flux retaining an onshore direction and the current hydrodynamic activity not being strong enough to move sediment offshore. However, inundation during periods of storm surge poses a risk to human habitation on low lying areas around the Avon-Heathcote Estuary and the Brooklands lagoon.
Eccentrically Braced Frames (EBFs) are a widely used seismic resisting structural steel system. Since their inception in the late 1970s, they have been a viable option with an available stiffness that is between simple braced systems and moment resisting systems. A similar concept, the linked column frame (LCF), uses shear links between two closely spaced columns. In both cases, the key component is the active link or the shear link, and this component is the objective of this study. The performance of high rise EBF buildings in the 2010 and 2011 Christchurch earthquakes was beyond that which was expected, especially considering the very high accelerations recorded. As the concrete high-rises were torn down, two EBF buildings remained standing and only required some structural repair. These events prompted a renewed interest in bolted shear links, as well as their performance. While some research into replaceable shear links had already been done (Mansour, 2011), the objectives of this study were to improve on the shear link itself, with the consideration that links built in the future are likely to be bolted. The main components of this study were to: 1. Reduce or eliminate the requirements for intermediate web stiffeners, as they were suspected of being detrimental to performance. Furthermore, any reduction in stiffening requirements is a direct fabrication cost saving. Links with low web aspect ratios were found to achieve exceptional ductilities when no stiffeners were included, prompting new design equations. 2. Ensure that the stresses in the ends of links are adequately transferred into the endplates without causing fractures. Although most of the experimental links had web doubler plates included, four had varied lengths of such doubler plates from 0.0 in. to 8.0 in. The link without any doubler plates performed to a similar level to its peers, and thus it is likely that links with quality end details may not need web doubler plates at all. 3. Evaluate the performance of a link with double sided stiffeners without the use of web welds, as opposed to conventional single sided, welded stiffeners. This link performed well, and web-weld-less double sided stiffeners may be an economical alternative to conventional stiffeners for deeper sections of links. 4. Evaluate the performance of a link with thin endplates that are made efficient with the use of gusset plates. This link performed to an acceptable level and provides evidence for a cost effective alternative to thick endplates, especially considering the high overstrength end moments in links, typically requiring 16-bolt connections. 5. Examine the potential use of an alternative EBF arrangement where the collector beam is over sized, and the link section is formed by cutting out parts of the beam's web. After running a series of finite element models each with a unique variation, a number of approximate design rules were derived such that future research could develop this idea further experimentally. 6. Ensure that during testing, the secondary elements (members that are not the shear link), do not yield and are not close to yielding. None of the instrumented elements experienced any unexpected yielding, however the concerns for high stresses in the collector beam panel zone during design were warranted. The use of an existing New Zealand design equation is recommended as an extra check for design codes worldwide. The above objectives were mainly conducted experimentally, except: the data set for item 1 was greatly expanded through the use of a calibrated numerical model which was then used in an extensive parametric study; item 5 was purely finite element based; and, a small parametric study was included for item 3 in an attempt to expand on the trends found there.