Simplified-Physics High Frequency Ground-Motion Simulations Using Site-Specific Parameters

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dc.contributor.authorVyas, Jagdish
dc.contributor.authorBradley, Brendon
dc.contributor.authorRazafindrakoto, Hoby
dc.contributor.authorThomson, Ethan
dc.contributor.authorLee, Robin
dc.date.accessioned2018-09-19T19:42:39Z
dc.date.available2018-09-19T19:42:39Z
dc.date.issued2018en
dc.description.abstractHybrid broadband simulation methods typically compute high-frequency portion of ground-motions using a simplified-physics approach (commonly known as “stochastic method”) using the same 1D velocity profile, anelastic attenuation profile and site-attenuation (κ0) value for all sites. However, these parameters relating to Earth structure are known to vary spatially. In this study we modify this conventional approach for high-frequency ground-shaking by using site-specific input parameters (referred to as “site-specific”) and analyze improvements over using same parameters for all sites (referred to as “generic”). First, we theoretically understand how different 1D velocity profiles, anelastic attenuation profiles and site-attenuation (κ0) values affects the Fourier Acceleration Spectrum (FAS). Then, we apply site-specific method to simulate 10 events from the 2010-2011 Canterbury earthquake sequence to assess performance against the generic approach in predicting recorded ground-motions. Our initial results suggest that the site-specific method yields a lower simulation standard deviation than generic case.en
dc.identifier.urihttp://hdl.handle.net/10092/16015
dc.language.isoen
dc.rightsCC-BY 4.0 Internationalen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/legalcode
dc.titleSimplified-Physics High Frequency Ground-Motion Simulations Using Site-Specific Parametersen
dc.typeConference Contributions - Otheren
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