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- Title
Nonlinear Site Amplification Factors for Constraining the NGA Models.
- Authors
Walling, Melanie; Silva, Walter; Abrahamson, Norman
- Abstract
Amplification factors computed from the equivalent-linear method using the program RASCALS are used to develop constraints on the nonlinear soil response for possible use by the NGA ground-motion model developers. The site response computations covered site conditions with average VS 30 values ranging from 160 to 900 m/s, soil depths from 15 to 914 m, and peak accelerations of the input rock motion ( VS 30=1100 m/s) between 0.01 g and 1.5 g. Four sets of nonlinear properties of the soils are used: EPRI, Peninsular Range, Imperial Valley, and Bay Mud. The first two soil models are used for VS 30≥270 m/s and the later two are used for VS 30≤190 m/s. Simple parametric models of the nonlinear amplification factors that are functions of the PGA on rock and VS 30 are developed for the EPRI and Peninsula models.
- Publication
Earthquake Spectra, 2008, Vol 24, Issue 1, p243
- ISSN
8755-2930
- Publication type
Article
- DOI
10.1193/1.2934350