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It is acknowledged that a number of research programmes are underway with funding from the Resilience to Nature’s Challenges, QuakeCoRE, NHRP and other sources, contributing towards infrastructure network performance at different capacities in terms of scope and features. Even though these models are developed for their own specific purposes, at present there is no structured framework to link different models together, in terms of what is needed in the flow from one model to the next so that integrated impact assessment can be performed. For this purpose we are going to develop a detailed linkage structure framework to link the models and identify potential modifications to software modules to refine inflows into successive models.
Assessing wastewater pipe performance through the 2010-2011 Canterbury Earthquake Sequence
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Tang - UC, Scott - UC, Hughes - UC
The 2010-2011 Canterbury Earthquake Sequence (CES ) caused widespread damage to Christchurch City’s wastewater network, resulting from permanent liquefaction-induced ground deformation and transient seismic shaking. Network damage led to significant loss of services and community disruption, in addition to environmental contamination. Although most of the Christchurch network has been repaired, questions remain on exact pipe damage mechanisms, structural performance and how earthquake impacts affected the service lifetimes of pipes. This study will use a dataset of concrete and reinforced concrete (rubber ring-jointed) pipes, with pre-and post-CES Closed Circuit Television (CCTV) observations, to assess earthquake-induced changes to structural condition related to pipe material and age, ground conditions and seismic parameters. Results will provide Christchurch asset managers with better information for their ongoing pipe renewals programmes, and provide asset managers in New Zealand and internationally information with which they can plan for anticipated earthquake impacts on their own pipe networks. To date a subset of pipes has been selected, and a review of pre-CES CCTV footage to improve and standardise structural performance observations is under way.