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Images, UC QuakeStudies

Damage to Medway Street in Richmond. The road surface is cracked and buckled, and covered in liquefaction silt. A temporary road sign restricting speed to 30 is visible, with road cones behind. The photographer comments, "Medway St, Woodchester Ave on right just beyond the 30 sign".

Images, eqnz.chch.2010

Plywood wall on a damaged house in Quinns Road, Shirley, Christchurch. File reference: CCL-2012-05-10-Around-Shirley-May-2012 DSC_02849.JPG From the collection of Christchurch City Libraries.

Images, eqnz.chch.2010

Plywood wall on a damaged house in Quinns Road, Shirley, Christchurch. File reference: CCL-2012-05-10-Around-Shirley-May-2012 DSC_02850.JPG From the collection of Christchurch City Libraries.

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

A photograph of the earthquake damage to a building on the corner of Gloucester and Manchester Streets. Sections of the façade have crumbled, the bricks spilling onto the footpath below. Wire fencing has been placed around the building as a cordon. In the distance there are many other earthquake-damaged buildings.

Images, UC QuakeStudies

Liquefaction-damaged carpets removed from a residential propoerty in Pines Beach, after the September 4th earthquake.