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Images for cycle; more images...

Images, UC QuakeStudies

A photograph looking north down Gayhurst Road, taken from the side of the bridge over the Avon River. Residential properties used to line the left-hand side of the road, and St Paul's church once stood on the corner. This was before the land was red-zoned as a result of the 2010 and 2011 Canterbury earthquakes. Separated cycle ways have recently been installed on both sides of the road. The photograph was modelled off an image taken by Mark Lincoln in September 2010.

Images, UC QuakeStudies

A photograph looking north down Gayhurst Road, taken from the side of the bridge over the Avon River. Residential properties used to line the left-hand side of the road, and St Paul's church once stood on the corner. This was before the land was red-zoned as a result of the 2010 and 2011 Canterbury earthquakes. Separated cycle ways have recently been installed on both sides of the road. The photograph was modelled off an image taken by Mark Lincoln in September 2010.

Images, UC QuakeStudies

A photograph looking north down Gayhurst Road, taken from the side of the bridge over the Avon River. Residential properties used to line the left-hand side of the road, and St Paul's church once stood on the corner. This was before the land was red-zoned as a result of the 2010 and 2011 Canterbury earthquakes. Separated cycle ways have recently been installed on both sides of the road. The photograph was modelled off an image taken by Mark Lincoln in September 2010.

Articles, Christchurch uncovered

Some of you might have been to the St James Conservation Area, a remote and beautiful area managed by the Department of Conservation. You might have been cycling or walking there, or you might have been drawn by the romance … Continue reading →

Research papers, University of Canterbury Library

Since September 2010 Christchurch, New Zealand, has experienced a number of significant earthquakes. In addition to loss of life, this has resulted in significant destruction to infrastructure, including road corridors; and buildings, especially in the central city, where it has been estimated that 60% of buildings will need to be rebuilt. The rebuild and renewal of Christchurch has initially focused on the central city under the direction of the Christchurch City Council. This has seen the development of a draft Central City Plan that includes a number of initiatives that should encourage the use of the bicycle as a mode of transport. The rebuild and renewal of the remainder of the city is under the jurisdiction of a specially set up authority, the Christchurch Earthquake Recovery Authority (CERA). CERA reports to an appointed Minister for Canterbury Earthquake Recovery, who is responsible for coordinating the planning, spending, and actual rebuilding work needed for the recovery. Their plans for the renewal and rebuild of the remainder of the city are not yet known. This presentation will examine the potential role of the bicycle as a mode of transport in a rebuilt Christchurch. The presentation will start by describing the nature of damage to Christchurch as a result of the 2010 and 2011 earthquakes. It will then review the Central City Plan (the plan for the rebuild and renewal for central Christchurch) focusing particularly on those aspects that affect the role of the bicycle. The potential for the success of this plan will be assessed. It will specifically reflect on this in light of some recent research in Christchurch that examined the importance of getting infrastructure right if an aim of transport planning is to attract new people to cycle for utilitarian reasons.

Images, UC QuakeStudies

Steel bracing on the front of the Worcester Street face of the Octagon Live Restaurant (formerly Trinity Church), which is being repaired. The scaffolding has been decorated with sculptures of people kayaking, cycling, climbing and bungee jumping. Some of the figures are wearing santa hats. A fence has been constructed at the base of the building.

Images, UC QuakeStudies

Steel bracing on the front of the Worcester Street face of the Octagon Live Restaurant (formerly Trinity Church), which is being repaired. The scaffolding has been decorated with sculptures of people kayaking, cycling, climbing and bungee jumping. Some of the figures are wearing santa hats. A fence has been constructed at the base of the building.

Images, UC QuakeStudies

Steel bracing on the front of the Worcester Street face of the Octagon Live Restaurant (formerly Trinity Church), which is being repaired. The scaffolding has been decorated with sculptures of people kayaking, cycling, climbing and bungee jumping. Some of the figures are wearing santa hats. A fence has been constructed at the base of the building.

Images, UC QuakeStudies

Steel bracing on the front of the Worcester Street face of the Octagon Live Restaurant (formerly Trinity Church), which is being repaired. The scaffolding has been decorated with sculptures of people kayaking, cycling, climbing and bungee jumping. Some of the figures are wearing santa hats. A fence has been constructed at the base of the building.

Images, UC QuakeStudies

Steel bracing on the front of the Worcester Street face of the Octagon Live Restaurant (formerly Trinity Church), which is being repaired. The scaffolding has been decorated with sculptures of people kayaking, cycling, climbing and bungee jumping. Some of the figures are wearing santa hats. A fence has been constructed at the base of the building.

Images, UC QuakeStudies

Steel bracing on the front of the Worcester Street face of the Octagon Live Restaurant (formerly Trinity Church), which is being repaired. The scaffolding has been decorated with sculptures of people kayaking, cycling, climbing and bungee jumping. Some of the figures are wearing santa hats. A fence has been constructed at the base of the building.

Images, UC QuakeStudies

A digitally manipulated image of a damaged building in Madras Street. The photographer comments, "After the 22 February earthquake in Christchurch there was a lot of damaged buildings. Sometimes there is the odd one where being unclothed or de-bricked let the world see their beauty".

Research papers, University of Canterbury Library

One of the most controversial issues highlighted by the 2010-2011 Christchurch earthquake series and more recently the 2016 Kaikoura earthquake, has been the evident difficulty and lack of knowledge and guidelines for: a) evaluation of the residual capacity damaged buildings to sustain future aftershocks; b) selection and implementation of a series of reliable repairing techniques to bring back the structure to a condition substantially the same as prior to the earthquake; and c) predicting the cost (or cost-effectiveness) of such repair intervention, when compared to fully replacement costs while accounting for potential aftershocks in the near future. As a result of such complexity and uncertainty (i.e., risk), in combination with the possibility (unique in New Zealand when compared to most of the seismic-prone countries) to rely on financial support from the insurance companies, many modern buildings, in a number exceeding typical expectations from past experiences at an international level, have ended up being demolished. This has resulted in additional time and indirect losses prior to the full reconstruction, as well as in an increase in uncertainty on the actual relocation of the investment. This research project provides the main end-users and stakeholders (practitioner engineers, owners, local and government authorities, insurers, and regulatory agencies) with comprehensive evidence-based information to assess the residual capacity of damage reinforced concrete buildings, and to evaluate the feasibility of repairing techniques, in order to support their delicate decision-making process of repair vs. demolition or replacement. Literature review on effectiveness of epoxy injection repairs, as well as experimental tests on full-scale beam-column joints shows that repaired specimens have a reduced initial stiffness compared with the undamaged specimen, with no apparent strength reduction, sometimes exhibiting higher displacement ductility capacities. Although the bond between the steel and concrete is only partially restored, it still allows the repaired specimen to dissipate at least the same amount of hysteretic energy. Experimental tests on buildings subjected to earthquake loading demonstrate that even for severe damage levels, the ability of the epoxy injection to restore the initial stiffness of the structure is significant. Literature review on damage assessment and repair guidelines suggests that there is consensus within the international community that concrete elements with cracks less than 0.2 mm wide only require cosmetic repairs; epoxy injection repairs of cracks less and 2.0 mm wide and concrete patching of spalled cover concrete (i.e., minor to moderate damage) is an appropiate repair strategy; and for severe damaged components (e.g., cracks greater than 2.0 mm wide, crushing of the concrete core, buckling of the longitudinal reinforcement) local replacement of steel and/or concrete in addition to epoxy crack injection is more appropriate. In terms of expected cracking patterns, non-linear finite element investigations on well-designed reinforced concrete beam-to-column joints, have shown that lower number of cracks but with wider openings are expected to occur for larger compressive concrete strength, f’c, and lower reinforcement content, ρs. It was also observed that the tensile concrete strength, ft, strongly affects the expected cracking pattern in the beam-column joints, the latter being more uniformly distributed for lower ft values. Strain rate effects do not seem to play an important role on the cracking pattern. However, small variations in the cracking pattern were observed for low reinforcement content as it approaches to the minimum required as per NZS 3101:2006. Simple equations are proposed in this research project to relate the maximum and residual crack widths with the steel strain at peak displacement, with or without axial load. A literature review on fracture of reinforcing steel due to low-cycle fatigue, including recent research using steel manufactured per New Zealand standards is also presented. Experimental results describing the influence of the cyclic effect on the ultimate strain capacity of the steel are also discussed, and preliminary equations to account for that effect are proposed. A literature review on the current practice to assess the seismic residual capacity of structures is also presented. The various factors affecting the residual fatigue life at a component level (i.e., plastic hinge) of well-designed reinforced concrete frames are discussed, and equations to quantify each of them are proposed, as well as a methodology to incorporate them into a full displacement-based procedure for pre-earthquake and post-earthquake seismic assessment.

Audio, Radio New Zealand

Rural Maori children in the Gisborne region will be visited at school by Health Officials in an effort to reduce the incidence of rheumatic fever; A designers' group says the Canterbury earthquake has created an opportunity for the local iwi to put its architectural stamp on the new Christchurch; Workers who carved the pou on Northland's popular new cycle trail will meet the Prime Minister later this month; Kaitaia people will be among the first in the country to see a long-awaited film about the much-loved comedian - Billy T James.

Images, Alexander Turnbull Library

Several people run, leap, cycle and walk the dog through an area piled high with waste material. Context: Bottle Lake Forest Park has tracks and trails which include mountain-bike tracks, horse-trekking trails and walking tracks. After being established as a temporary dump after the February 22 earthquake the government intend to use special powers to turn part of Bottle Lake Forest Park into a permanent dump. Quantity: 1 digital cartoon(s).

Images, UC QuakeStudies

Part of Mike Hewson's installation 'Homage To Lost Spaces' in the Cramner Courts building, photographs of people riding bicycles have been inserted into a gap in the building. The photographer comments, "Cranmer Courts was very badly damaged in the quakes that unexpectedly hit Christchurch. Originally big photographs were put into the holes where the doors and windows were, but now these massive pictures have been put across the boarded up ends of the buildings to keep them alive in the minds of the people of Christchurch. The project was thought up by Mike Hewson".

Images, UC QuakeStudies

Spray-painted writing on the side of a car parking building reads "0 cars". The photographer comments, "Strangely and appropriately this graffiti was on a car park. In fact the graffiti was 100% correct as the car park is in the Christchurch earthquake red zone and there should be zero cars now inside it. It may have been put on by an anti car protester or just an indication that the car park is empty. One of the suggestions for the City plan for the rebuilt Christchurch was for a pedestrian and cycle only area, which also fits in with 0 CARS".

Research papers, University of Canterbury Library

Despite their good performance in terms of their design objectives, many modern code-prescriptive buildings built in Christchurch, New Zealand had to be razed after the 2010-2011 Canterbury earthquakes because repairs were deemed too costly due to widespread sacrificial damage. Clearly a more effective design paradigm is needed to create more resilient structures. Rocking, post-tensioned connections with supplemental energy dissipation can contribute to a damage avoidance designs (DAD). However, few have achieved all three key design objectives of damage-resistant rocking, inherent recentering ability, and repeatable, damage-free energy dissipation for all cycles, which together offer a response which is independent of loading history. Results of experimental tests are presented for a near full-scale rocking beam-column sub-assemblage. A matrix of test results is presented for the system under varying levels of posttensioning, with and without supplemental dampers. Importantly, this parametric study delineates each contribution to response. Practical limitations on posttensioning are identified: a minimum to ensure static structural re-centering, and a maximum to ensure deformability without threadbar yielding. Good agreement between a mechanistic model and experimental results over all parameters and inputs indicates the model is robust and accurate for design. The overall results indicate that it is possible to create a DAD connection where the non-linear force-deformation response is loading history independent and repeatable over numerous loading cycles, without damage, creating the opportunity for the design and implementation of highly resilient structures.