Ground-motion selection for scenario ruptures using the generalized conditional intensity measure (GCIM) approach and its application for several major scenario earthquakes in New Zealand (2014)
Type of ContentReports
PublisherUniversity of Canterbury. Civil and Natural Resources Engineering
- Engineering: Reports 
AuthorsTarbali, K., Bradley, B.A.show all
Generalized conditional intensity measure (GCIM) method is extended to ground motion selection for scenario ruptures. Using different rupture scenarios and site conditions, various aspects of the GCIM methodology are scrutinized, including: (i) implementation of different weight vectors and the composition of the IM vector; (ii) quantifying the importance of replicate selections for different number of desired ground motions; and (iii) the effect of considering bounds on the implicit causal parameters of the prospective ground motions. Using the extended methodology, representative ground motion ensembles for several major earthquake scenarios in New Zealand are developed. Cases considered include representative ground motions for the occurrence of Alpine, Hope, and Porters Pass earthquakes in Christchurch city, and the occurrence of Wellington, Wairarapa, and Ohariu fault ruptures in Wellington city. Challenges in the development of ground motion ensembles for subduction zone earthquakes are also highlighted. The selected 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?”
CitationTarbali, K., Bradley, B.A. (2014) Ground-motion selection for scenario ruptures using the generalized conditional intensity measure (GCIM) approach and its application for several major scenario earthquakes in New Zealand. 93..
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ANZSRC Fields of Research04 - Earth Sciences::0404 - Geophysics::040407 - Seismology and Seismic Exploration
09 - Engineering::0905 - Civil Engineering::090504 - Earthquake Engineering