Representative ground motion ensembles for several major earthquake scenarios in New Zealand

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Publisher
University of Canterbury. Civil and Natural Resources Engineering
Journal Title
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Date
2014
Authors
Tarbali, K.
Bradley, Brendon
Abstract

This paper develops representative ground motion ensembles for several major earthquake scenarios in New Zealand. Cases considered include representative ground motions for the occurrence of Alpine, Hope, and Porters Pass earthquakes in Christchurch, and the occurrence of Wellington, Wairarapa, and Ohariu, fault ruptures in Wellington. Challenges in the development of ground motion ensembles for subduction zone earthquakes are also highlighted. The ground motions are selected based on the generalized conditional intensity measure (GCIM) approach, ensuring that the ground motion ensembles represent both the mean, and distribution of ground motion intensity which such scenarios could impose. These scenario-based ground motion sets can be used to complement ground motions which are often selected in conjunction with probabilistic seismic hazard analysis, in order to understand the performance of structures for the question “what if this fault ruptures?”

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Citation
Tarbali, K., Bradley, B.A. (2014) Representative ground motion ensembles for several major earthquake scenarios in New Zealand. Auckland, New Zealand: 2014 New Zealand Society for Earthquake Engineering Conference (NZSEE), 21-23 Mar 2014. 10pp.
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ANZSRC fields of research
Fields of Research::40 - Engineering::4005 - Civil engineering::400506 - Earthquake engineering
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