Analytical 1D transfer functions for layered soils

Garcia‐Suarez, Joaquin; González-Carbajal, Javier; Asimaki, Domniki

doi:10.1016/j.soildyn.2022.107532

Cited by 2 publications

(1 citation statement)

References 18 publications

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“…To quantify the site-specific feasibility of the 1D SRA, a taxonomy proposed by Tao and Rathje (2020) is utilized in this study. Specifically, the transfer functions (TFs) (Aki and Richards, 2002;Garcia-Suarez et al, 2022;Kramer, 1996) and the Horizontal-to-Vertical Spectral Ratios (HVSRs) (Garcı´a-Jerez et al, 2016) are incorporated in the evaluation procedure. The empirical HVSR from the 3D GMS is computed to identify the first-mode resonant frequency of the site, and the within and outcrop TFs are used to distinguish true outcrop-resonances from pseudo-resonances (Tao and Rathje, 2020).…”

Section: Twelve Representative Stationsmentioning

confidence: 99%

A comparison of ground motions predicted through one-dimensional site response analyses and three-dimensional wave propagation simulations at regional scales

Zhang,

Dong,

Crempien

et al. 2024

Earthquake Spectra

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One-dimensional (1D) site response analysis (SRA), which considers vertically propagating seismic waves from the bedrock to the surface, has been a common technique among geotechnical engineers to examine site-specific ground shaking. However, observations from past earthquakes and analytical studies indicate that idealizations ingrained in 1D SRA may be too severe to capture the ground truth, such as the omissions of spatial variability of soil properties, surface topography, and basin and directivity effects. Physics-based three-dimensional ground motion simulations (GMSs) can incorporate these factors and yield more reliable predictions. In this study, we utilize ground motions from 57 physics-based broadband (from 0 to 8–12 Hz) GMS for a region of Istanbul. A total of 2912 sites with experimentally measured soil profiles that are distributed over the 30 km-by-12.5 km area are also modeled as soil columns and analyzed through 1D SRA. The ground responses from 1D SRA and three-dimensional (3D) GMS are then compared for all 57 earthquake scenarios. These systematic comparisons are then used for examining model features that are correlated with variations in the ratios of various ground motion intensity measures (IMs) and for developing regression-based formulas that can be used for determining simple factors for the considered region to correctly scale (up or down) the site-specific ground motion intensities obtained from 1D SRA, including peak ground acceleration (PGA), peak ground velocity (PGV), and spectral acceleration ( Sa) values.

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