Bertelli, S;
Ruiter, R;
Lopez-Querol, S;
Giovinazzi, S;
Rossetto, T;
(2019)
Investigation of a Numerical Approach for Assessing Liquefaction and its Effects on Telecom Systems.
In: Gazetas, George and Anastasopoulos, Ioannis, (eds.)
Proceedings of the 2nd International Conference on Natural Hazards and Infrastructure (ICONHIC 2019).
ICONHIC 2019: Chania, Crete, Greece.
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Abstract
Soil liquefaction has caused substantial infrastructure damage in recent earthquakes. During the 2010-2011 Canterbury Earthquake Sequence (CES), in New Zealand, liquefaction-induced damage to buried cables resulted in service interruption of the telecommunication network. This paper is part of a broader study on the seismic risk of buried infrastructure. It aims to compare numerical and empirical prediction methodologies with the observation maps produced in the aftermath of the Christchurch event. Starting from a description of the New Zealand telecommunication infrastructure and pipelines, the research first explores the vast amount of data and in-situ geotechnical inspections collected after the CES. These data are employed to test several liquefaction-triggering models available in the literature and results are provided through an exploratory spatial analysis. Then, a numerical simulation of a soil profile with and without pipelines from the suburb of Avondale, which was one of the locations most impacted by liquefaction damages, is carried out adopting the Byrne’s formulation for the classic Martin and Finn’s constitutive model in a full dynamic analysis in FLAC-2D. The obtained results from the numerical model are finally cross-checked with the empirical analyses, the existing liquefaction investigation maps, and field observations collected in the aftermath of the event.
| Type: | Proceedings paper |
|---|---|
| Title: | Investigation of a Numerical Approach for Assessing Liquefaction and its Effects on Telecom Systems |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://iconhic.com/2019/ |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | telecommunications, liquefaction, numerical analyses, buried cables |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10078350 |
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