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Research papers, The University of Auckland Library

Utility managers are always looking for appropriate tools to estimate seismic damage in wastewater networks located in earthquake prone areas. Fragility curves, as an appropriate tool, are recommended for seismic vulnerability analysis of buried pipelines, including pressurised and unpressurised networks. Fragility curves are developed in pressurised networks mainly for water networks. Fragility curves are also recommended for seismic analysis in unpressurised networks. Applying fragility curves in unpressurised networks affects accuracy of seismic damage estimation. This study shows limitations of these curves in unpressurised networks. Multiple case study analysis was applied to demonstrate the limitations of the application of fragility curves in unpressurised networks in New Zealand. Four wastewater networks within New Zealand were selected as case studies and various fragility curves used for seismic damage estimation. Observed damage in unpressurised networks after the 2007 earthquake in Gisborne and the 2010 earthquake in Christchurch demonstrate the appropriateness of the applied fragility curves to New Zealand wastewater networks. This study shows that the application of fragility curves, which are developed from pressurised networks, cannot be accurately used for seismic damage assessment in unpressurised wastewater networks. This study demonstrated the effects of different parameters on seismic damage vulnerability of unpressurised networks.

Images, UC QuakeStudies

The dome of the Isaac Theatre Royal covered in sheeting and suspended in the backstage area. In the foreground, a small digger sits on the bed of a truck, and a crane is visible to the left. The photographer comments, "This is the 'dome' of the Isaac Theatre Royal's heritage stage. The front section of the theatre has stayed and so has the back, but the middle has been completely demolished. The best way to hide a secret is in plain sight. Could this really be an ancient UFO stored secretly in the old theatre for decades and now exposed by the earthquake? Is the waiting crane and transporter ready to whip it away to another secret location in the dead of night?".

Research papers, University of Canterbury Library

The Master of Engineering Management Project was sponsored by the Canterbury Earthquake Recovery Authority (CERA) and consisted of two phases: The first was an analysis of existing information detailing the effects of hazardous natural events on Canterbury Lifeline Utilities in the past 15 years. The aim of this “Lessons Learned” project was to produce an analysis report that identified key themes from the research, gaps in the existing data and to provide recommendations from these “Lessons Learned.” The Second phase was the development of a practical “Disaster Mitigation Guideline” that outlined lessons in the field of Emergency Sanitation. This research would build upon the first stage and would draw from international reference to develop a guideline that has practical implementation possibilities throughout the world.

Images, UC QuakeStudies

Photograph captioned by BeckerFraserPhotos, "The machinery used in the demolitions keeps getting more sophisticated as the taller buildings are dealt with. This is the large crane put in place to work on the deconstruction and demolition of the BNZ Building".

Images, UC QuakeStudies

A fallen branch caught in weeds in the River Styx. The photographer comments, "This branch was broken off during one of the recent Christchurch earthquakes and fell into the River Styx. Now one side has sprouted roots and the other new buds".

Images, UC QuakeStudies

Member of the public using the Dance-O-Mat, a dance floor on a vacant site with coin operated light and music player. This was a project by Gap Filler who wanted to give the Christchurch community a unique dance experience whilst bringing life to our broken city.

Articles, UC QuakeStudies

A photograph captioned, "I was reading in the paper this morning about one of the people who was orange and then went red yesterday. They said they were really glad they'd gone red rather than green-blue. Green-blue is the one they're going to have problems with".

Images, UC QuakeStudies

Photograph captioned by BeckerFraserPhotos, "The machinery used in the demolitions keeps getting more sophisticated as the taller buildings are dealt with. This is the large crane put in place to work on the deconstruction and demolition of the BNZ Building".

Images, UC QuakeStudies

Various walls on the street of Christchurch have become public art spaces. This work, "The Phoenix", by professional graffiti artists, Jacob, aka Yikes, Nick, aka Icarus and Wongi includes a fire Phoenix and the words "Christchurch destined to rise". Above it is an advertisement for Phonequip.

Articles, UC QuakeStudies

A photograph captioned, "I guess the only good thing that came out of the earthquake is that we know the residents better. It definitely bought people together, and the support was incredible. If you didn't know your neighbours before, you definitely knew them after the quake. We made friends out of this".

Research papers, The University of Auckland Library

Micro - electro - mechanical system (MEMS) based accelerometers are now frequently used in many different parts of our day - to - day lives. It is also increasingly being used for structural testing applications. Researchers have had res ervation of using these devices as they are relatively untested, but now with the wider adoption, it provides a much cheaper and more versatile tool for structural engineering researchers. A number of damaged buildings in the Christchurch Central Business District (CBD) were instrumented with a number of low - cost MEMS accelerometers after the major Christchurch earthquakes. The accelerometers captured extremely high quality building response data as the buildings experienced thousands of aftershocks. This d ata set was amongst one of only a handful of data set s available around the world which provides building response data subjected to real ground motion. Furthermore, due to technological advances, a much larger than usual number of accelerometers has been deployed making the data set one of the most comprehensive available. This data set is utilised to extract modal parameters of the buildings. This paper summarises the operating requirements and preference for using such accelerometers for experimental mod al analysis. The challenges for adapting MEMS based devices for successful modal parameters identification are also discussed.

Images, UC QuakeStudies

A photograph of a sign on a fence in front of a partially-demolished building on Cashel Street. The sign reads, "This building is dangerous and not safe to enter". In the background, an excavator is working to remove the rubble from in front of the building.

Images, UC QuakeStudies

The word 'faith' has been formed by flowers on the cordon fence beside St John the Baptist Church on Latimer Square. The photographer comments, "If I remember correctly this has been on the fence surrounding the Christchurch earthquake red zone for quite a while and looks remarkably pristine".