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Research papers, The University of Auckland Library

Having a quick but reliable insight into the likelihood of damage to bridges immediately after an earthquake is an important concern especially in the earthquake prone countries such as New Zealand for ensuring emergency transportation network operations. A set of primary indicators necessary to perform damage likelihood assessment are ground motion parameters such as peak ground acceleration (PGA) at each bridge site. Organizations, such as GNS in New Zealand, record these parameters using distributed arrays of sensors. The challenge is that those sensors are not installed at, or close to, bridge sites and so bridge site specific data are not readily available. This study proposes a method to predict ground motion parameters for each bridge site based on remote seismic array recordings. Because of the existing abundant source of data related to two recent strong earthquakes that occurred in 2010 and 2011 and their aftershocks, the city of Christchurch is considered to develop and examine the method. Artificial neural networks have been considered for this research. Accelerations recorded by the GeoNet seismic array were considered to develop a functional relationship enabling the prediction of PGAs. http://www.nzsee.org.nz/db/2013/Posters.htm

Research papers, University of Canterbury Library

The Mw 6.2 February 22nd 2011 Christchurch earthquake (and others in the 2010-2011 Canterbury sequence) provided a unique opportunity to study the devastating effects of earthquakes first-hand and learn from them for future engineering applications. All major events in the Canterbury earthquake sequence caused widespread liquefaction throughout Christchurch’s eastern suburbs, particularly extensive and severe during the February 22nd event. Along large stretches of the Avon River banks (and to a lesser extent along the Heathcote) significant lateral spreading occurred, affecting bridges and the infrastructure they support. The first stage of this research involved conducting detailed field reconnaissance to document liquefaction and lateral spreading-induced damage to several case study bridges along the Avon River. The case study bridges cover a range of ages and construction types but all are reinforced concrete structures which have relatively short, stiff decks. These factors combined led to a characteristic deformation mechanism involving deck-pinning and abutment back-rotation with consequent damage to the abutment piles and slumping of the approaches. The second stage of the research involved using pseudo-static analysis, a simplified seismic modelling tool, to analyse two of the bridges. An advantage of pseudo-static analysis over more complicated modelling methods is that it uses conventional geotechnical data in its inputs, such as SPT blowcount and CPT cone resistance and local friction. Pseudo-static analysis can also be applied without excessive computational power or specialised knowledge, yet it has been shown to capture the basic mechanisms of pile behaviour. Single pile and whole bridge models were constructed for each bridge, and both cyclic and lateral spreading phases of loading were investigated. Parametric studies were carried out which varied the values of key parameters to identify their influence on pile response, and computed displacements and damages were compared with observations made in the field. It was shown that pseudo-static analysis was able to capture the characteristic damage mechanisms observed in the field, however the treatment of key parameters affecting pile response is of primary importance. Recommendations were made concerning the treatment of these governing parameters controlling pile response. In this way the future application of pseudo-static analysis as a tool for analysing and designing bridge pile foundations in liquefying and laterally spreading soils is enhanced.

Images, UC QuakeStudies

A photograph of an installation of blue tarpaulin flags on the Worcester Street bridge. The installation, titled Eye of the Storm, was created for Canterbury Tales by students from the School of Design at the University of Technology Sydney. Canterbury Tales was a carnivalesque procession and the main event of FESTA 2013.

Images, UC QuakeStudies

A photograph of an installation of blue tarpaulin flags on the Worcester Street bridge. The installation, titled Eye of the Storm/em>, was created for Canterbury Tales by students from the School of Design at the University of Technology Sydney. Canterbury Tales was a carnivalesque procession and the main event of FESTA 2013.

Images, UC QuakeStudies

A photograph of students from the School of Design at the University of Technology Sydney constructing Eye of the Storm out of blue tarpaulin flags. The flags were strung across Worcester Street bridge for Canterbury Tales - a carnivalesque procession which was the main event of FESTA 2013.

Images, UC QuakeStudies

A photograph of an installation of blue tarpaulin flags on the Worcester Street bridge. The installation, titled Eye of the Storm, was created for Canterbury Tales by students from the School of Design at the University of Technology Sydney. Canterbury Tales was a carnivalesque procession and the main event of FESTA 2013.

Images, UC QuakeStudies

A photograph of an installation of blue tarpaulin flags on the Worcester Street bridge. The installation, titled Eye of the Storm, was created for Canterbury Tales by students from the School of Design at the University of Technology Sydney. Canterbury Tales was a carnivalesque procession and the main event of FESTA 2013.

Images, UC QuakeStudies

A photograph of an installation of blue tarpaulin flags on the Worcester Street bridge. The installation, titled Eye of the Storm, was created for Canterbury Tales by students from the School of Design at the University of Technology Sydney. Canterbury Tales was a carnivalesque procession and the main event of FESTA 2013.

Images, UC QuakeStudies

A photograph of an installation of blue tarpaulin flags on the Worcester Street bridge. The installation, titled Eye of the Storm, was created for Canterbury Tales by students from the School of Design at the University of Technology Sydney. Canterbury Tales was a carnivalesque procession and the main event of FESTA 2013.

Images, UC QuakeStudies

A photograph of an installation of blue tarpaulin flags on the Worcester Street bridge. The installation, titled Eye of the Storm, was created for Canterbury Tales by students from the School of Design at the University of Technology Sydney. Canterbury Tales was a carnivalesque procession and the main event of FESTA 2013.

Images, UC QuakeStudies

A photograph of students from the School of Design at the University of Technology Sydney constructing Eye of the Storm out of blue tarpaulin flags. The flags were strung across Worcester Street bridge for Canterbury Tales - a carnivalesque procession which was the main event of FESTA 2013.

Images, UC QuakeStudies

A photograph of an installation titled Eye of the Storm being created on Worcester Street bridge by students from the School of Design at the University of Technology Sydney. The installation was part of Canterbury Tales - a carnivalesque procession which was the main event of FESTA 2013.

Images, UC QuakeStudies

A photograph of people looking at an installation of tarpaulin flags strung across the Worcester Street bridge. The installation, titled Eye of the Storm/em>, was created for Canterbury Tales by students from the School of Design at the University of Technology Sydney. Canterbury Tales was a carnivalesque procession and the main event of FESTA 2013.

Images, UC QuakeStudies

A photograph of an installation of blue tarpaulin flags on the Worcester Street bridge. The installation, titled Eye of the Storm/em>, was created for Canterbury Tales by students from the School of Design at the University of Technology Sydney. Canterbury Tales was a carnivalesque procession and the main event of FESTA 2013.

Images, UC QuakeStudies

A photograph of an installation of blue tarpaulin flags on the Worcester Street bridge. The installation, titled Eye of the Storm/em>, was created for Canterbury Tales by students from the School of Design at the University of Technology Sydney. Canterbury Tales was a carnivalesque procession and the main event of FESTA 2013.

Images, UC QuakeStudies

A photograph of an installation of blue tarpaulin flags on the Worcester Street bridge. The installation, titled Eye of the Storm/em>, was created for Canterbury Tales by students from the School of Design at the University of Technology Sydney. Canterbury Tales was a carnivalesque procession and the main event of FESTA 2013.

Images, UC QuakeStudies

A photograph of an installation of blue tarpaulin flags on the Worcester Street bridge. The installation, titled Eye of the Storm/em>, was created for Canterbury Tales by students from the School of Design at the University of Technology Sydney. Canterbury Tales was a carnivalesque procession and the main event of FESTA 2013.

Images, UC QuakeStudies

A photograph of an installation of blue tarpaulin flags on the Worcester Street bridge. The installation, titled Eye of the Storm/em>, was created for Canterbury Tales by students from the School of Design at the University of Technology Sydney. Canterbury Tales was a carnivalesque procession and the main event of FESTA 2013.

Images, UC QuakeStudies

A photograph of an installation of blue tarpaulin flags on the Worcester Street bridge. The installation, titled Eye of the Storm/em>, was created for Canterbury Tales by students from the School of Design at the University of Technology Sydney. Canterbury Tales was a carnivalesque procession and the main event of FESTA 2013.