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Audio, Radio New Zealand

In the hours after the February 2011 Canterbury earthquake, Chessie Henry's father Chris Henry, a Kaikoura-based doctor, crawled into makeshift tunnels in the collapsed CTV building to rescue the living and look for the dead. Six years later, Chessie interviewed Chris in an attempt to understand the trauma that lead her father to burnout. In her book just published, We Can Make A Life: A memoir of family, earthquakes and courage, Chessie Henry considers the psychological cost of heroism and unravels stories and memories from her family history.

Research papers, The University of Auckland Library

The increasing prevalence of mixed-material buildings that combine concrete walls and steel frames in New Zealand, coupled with a lack of specific design and detailing guidelines for concrete wall-steel beam connections, underscores the need for comprehensive research to ensure that these structures behave as intended during earthquakes. Bolted web plate connections, commonly found in steel framing systems, are typically used to connect steel beams to concrete walls. These connections are idealised as pinned during design. However, research on steel framing systems has shown that these connections can develop significant stiffness and moment resistance when subjected to large rotations during seismic loading, potentially leading to brittle failure when used in concrete wall to steel beam applications. This thesis was written to understand the seismic performance of concrete wall-steel beam bolted web plate connections, providing experimental evidence, numerical modelling insights, and design recommendations to address critical gaps in current design practices. The study is divided into three phases. First, a review of 50 concrete wall-steel frame buildings in Auckland and Christchurch was conducted to understand current design practices and typical connection details. The findings revealed significant variation in design and detailing practices and a lack of specific guidelines for concrete wall-steel beam connections. Second, an experimental programme was conducted on four full-scale concrete wall-steel beam sub-assemblages, each incorporating variations in connection detailing. The tests were designed to quantify the rotation capacity of concrete wall-steel beam connections, identify failure modes and investigate the effectiveness of potential connection improvements. Results demonstrated that concrete wall-steel beam bolted web plate connections designed using current design standards and following existing practices are vulnerable to non-ductile failure characterised by concrete breakout. However, using slotted holes in the web plate and bent reinforcing bar anchors instead of headed stud anchors improved connection rotation capacity. Third, a numerical model of a case study building was developed on OpenSeesPy, with different connection conditions assumed based on the experimental results. Pushover and time history analyses were conducted to evaluate the implications of different connection conditions (pinned vs non-pinned) on global building response and local member demands. The findings revealed that using non-pinned connection conditions does not significantly affect the global building response and shear and bending moment demands on lateral load-resisting elements. However, doing so generates overstrength moments on the connections that induce different actions on out-of-plane concrete walls connected to steel beams. Synthesising findings from all three phases, this thesis concludes with a proposed design procedure for concrete wall-steel beam connections based on a capacity design approach to ensure ductile failure modes and suppress brittle ones. Key recommendations include selecting appropriate bolt hole geometry and anchorage, providing sufficient rotation capacity, and accounting for connection overstrength in global analyses.

Videos, UC QuakeStudies

A video of TVNZ's Breakfast show broadcasting live from Cathedral Square. Presenters Paul Henry and Pippa Wetzel have flown down to Christchurch to record a special show titled "Breakfast for Canterbury", which aims to celebrate the Canterbury region's resilience in the aftermath of the 4 September 2010 earthquake.

Images, eqnz.chch.2010

20140927_2219_1D3-24 Planting natives at Harold Henry Park A planting of native bushes and trees in the old children's playground area in Bexley, Organised by the Facebook group Avon River Park and assisted by ex Bexley residents. This is right in the middle of the Bexley red zone with most houses removed or demolished now. #5832

Images, UC QuakeStudies

Silver Award presented to Henry Jenkins, originally from Blenheim. Pictured here with Vice-Chancellor Dr Rod Carr, Prime Minister John Key and Minister for Canterbury Earthquake Recovery Gerry Brownlee.

Images, UC QuakeStudies

Silver Award presented to Henry Jenkins, originally from Blenheim. Pictured here with Vice-Chancellor Dr Rod Carr, Prime Minister John Key and Minister for Canterbury Earthquake Recovery Gerry Brownlee.

Research papers, The University of Auckland Library

Following the 2010/2011 Canterbury (New Zealand) 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 to establish representative details used in both existing and new multi-storey and low rise industrial precast concrete buildings. 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. Following the Canterbury earthquakes, it was observed that brittle failure had occurred in some grouted metal duct connections used for precast concrete wall panels, resulting in recommendations for more robust detailing of this connection type. A set of experimental tests was subsequently performed to investigate the in-plane seismic behaviour of precast concrete wall panel connections. This testing comprised of seven reversed cyclic in-plane tests of fullscale precast concrete wall panels having wall-to-foundation grouted metal duct connections. Walls with existing connection detailing were found to perform adequately when carrying low axial loads, but performance was found to be less satisfactory as the axial load and wall panel length increased. The use of new recommended detailing was observed to prevent brittle connection response and to improve the robustness of the reinforcement splice. A parametric investigation was conducted using the finite element method to predict the failure mode of metal duct connections. From the results of the parametric study on metal duct connections it was identified that there were three possible failure modes, being reinforcement fracture, concrete spalling without metal duct pull out, and concrete spalling with metal duct pull-out. An alternative simple analytical method was proposed in order to determine the type of connection failure without using a time-consuming finite element method. Grouted sleeves inserts are an alternative connector that is widely used to connect wall panels to the foundations. The two full-scale wall panels were subjected to reversed cyclic in-plane demands until failure of either the connection or the wall panel. Wall panel failure was due to a combination of connection reinforcement pulling-out from the coupler and reinforcement fracture. In addition, non-embedded grouted sleeve tests filled with different quality of grout were conducted by subjecting these coupler assemblages to cyclic and monotonic forces.

Articles, Christchurch uncovered

Today, through the wonders of archaeology and Papers Past, we bring you the story of Charles Henry Cox, a man whose crime has been buried – literally – for over 100 years. But let’s not get too carried away. As … Continue reading →

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, The University of Auckland Library

The 2010/2011 Canterbury earthquakes have provided a unique opportunity to investigate the seismic performance of both traditional and modern buildings constructed in New Zealand. It is critical that the observed performance is examined and compared against the expected levels of performance that are outlined by the Building Code and Design Standards. In particular, in recent years there has been a significant amount of research into the seismic behaviour of precast concrete floor systems and the robustness of the support connections as a building deforms during an earthquake. An investigation of precast concrete floor systems in Christchurch has been undertaken to assess both the performance of traditional and current design practice. The observed performance for each type of precast floor unit was collated from a number of post-earthquake recognisance activities and compared against the expected performance determined for previous experimental testing and analysis. Possible reasons for both the observed damage, and in some cases the lack of damage, were identified. This critical review of precast concrete floor systems will assist in determining the success of current design practice as well as identify any areas that require further research and/or changes to design standards.

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Christchurch families have come to Timaru to get away from the aftershocks (L-R) Henry Robertson (3 years), Joanne Byrne holding her son Frankie Mallia (18 months), Sarah Mallia holding her 12 week son Edward Robertson, Harriet Mallia (3 years), Naomi Cooke holding her son Zeb Meyer-Cooke (17 months) and Jonti Meyer Cooke (4 years)".

Audio, Radio New Zealand

TE URUROA FLAVELL to the Minister of Justice: Is she satisfied with the Electoral Commission's engagement with whanau, hapū, iwi and marae around the 2013 Māori Electoral Option; if so, what advice has she received that would explain why halfway through the process there are only 5,000 new enrolments? DAVID SHEARER to the Prime Minister: On what date was he, his office or the Department of Prime Minister and Cabinet first informed that David Henry would not meet his deadline of the end of May as set out in the terms of reference for reporting back and what reason did Mr Henry provide for the delay? KATRINA SHANKS to the Minister of Finance: What do recent indicators show about the economy's performance this year and its outlook for the next three to four years? DAVID SHEARER to the Prime Minister: Has he received any information that shows foreign intelligence agencies are routinely collecting emails, other communication or location data on New Zealand citizens and residents while they are in New Zealand; if so, has the resulting information been passed on to the Government Communications Security Bureau? ALFRED NGARO to the Minister of Education: What recent announcement has she made about achievement against National Standards? METIRIA TUREI to the Minister for Economic Development: Will the Government sign the legal contract between it and SkyCity for the SkyCity Convention Centre this week; if not, when will it sign this agreement? JAMI-LEE ROSS to the Minister of Housing: What policy conclusions, if any, does the Government draw from Priced Out – How New Zealand Lost its Housing Affordability and how consistent are its findings with those of the 2012 Productivity Commission Report on housing affordability? Hon ANNETTE KING to the Minister of Health: Does he stand by all his statements on health; if not, why not? NICKY WAGNER to the Minister for Canterbury Earthquake Recovery: How will the Government support the redevelopment and repopulation of the Christchurch Central Business District following the Canterbury earthquakes? CHRIS HIPKINS to the Minister of Education: Is she confident that the National Standards data being released today gives an accurate picture of student progress; if not, why not? Rt Hon WINSTON PETERS to the Prime Minister: Did he discuss with David Henry the requirement for Mr Henry to see the full unedited electronic record connected with the Kitteridge report leak; if not, why not? JOHN HAYES to the Minister of Customs: What information has he received regarding the success of automated passenger processing systems at the border?

Audio, Radio New Zealand

On today's First Up pod: The fallout from the resignation of the Archbishop of Canterbury continues - Henry Riley joined First Up from London, an overnight earthquake and the world's worst pollution - Anas Mallick reports from Pakistan, Waikato is our neighbourhood this week - Natalie Akoorie is RNZ's eyes and ears in Hamilton, and Treaty of Waitangi expert Dr Aroha Harris tells Nathan Rarere that Treaty Principles have been around since our founding document was signed. First Up - Voice of the Nathan!