Saygili & Rathje (2008) model — Dn

Implements the two-parameter (PGA, Arias intensity) vector model (Saygili & Rathje 2008 Eq. 6, Tables 1-2), including its amplitude-dependent sigma 0.46 + 0.56 (ky/PGA). Note the authors' recommended vector model was (PGA, PGV); the (PGA, Ia) variant is published and adopted here for consistency with the Arias-based rigid ensemble.

Usage

Dn_SR08(PGA, ky, AI = NULL)

Arguments

PGA: Peak ground acceleration (g).
ky: Yield acceleration (g).
AI: Arias Intensity (m/s); if NULL, back-calculated from PGA via an in-house rock-site regression (SeVyT 2023 dataset).

Value

data.table(muLnD, sdLnD, ID = "SR08")

Examples

Dn_SR08(PGA = 0.5, ky = 0.1)
#>       muLnD sdLnD     ID
#>       <num> <num> <char>
#> 1: 3.725351 0.572   SR08