A Modified Frequency-Dependent Equivalent Linear Method for Seismic Site Response Analyses and Model Validation using KiK-Net Borehole Arrays

2018 ◽  
Vol 24 (5) ◽  
pp. 827-844 ◽  
Author(s):  
Duruo Huang ◽  
Gang Wang ◽  
Chaoyi Wang ◽  
Feng Jin
Keyword(s):  
Model Validation ◽  
Site Response ◽  
Linear Method ◽  
Frequency Dependent ◽  
Seismic Site Response ◽  
Equivalent Linear ◽  
Equivalent Linear Method

Nonlinear Site Amplification Factors for Constraining the NGA Models

2008 ◽  
Vol 24 (1) ◽  
pp. 243-255 ◽  
Author(s):  
Melanie Walling ◽  
Walter Silva ◽  
Norman Abrahamson
Keyword(s):  
Site Response ◽  
Linear Method ◽  
Site Amplification ◽  
Parametric Models ◽  
Imperial Valley ◽  
Soil Response ◽  
Amplification Factors ◽  
Nonlinear Properties ◽  
Ground Motion Model ◽  
Equivalent Linear Method

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 VS30 values ranging from 160 to 900 m/s, soil depths from 15 to 914 m, and peak accelerations of the input rock motion ( VS30=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 VS30≥270 m/s and the later two are used for VS30≤190 m/s. Simple parametric models of the nonlinear amplification factors that are functions of the PGA on rock and VS30 are developed for the EPRI and Peninsula models.

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