RotD_cal_PSA: A function to calculate rotated combination of two...

In wltcwpf/RCTC: The Rotated Combination of Two-Component Ground Motions

A function to calculate rotated combination of two horizontals for pseudo spectra acceleration

Description

This function computes rotated combination of two horizontals for pseudo spectra acceleration

Usage

RotD_cal_PSA(
  data1,
  data2,
  period = NA,
  damping = 0.05,
  combine_index = 50,
  dt,
  Interpolation_factor = "auto",
  fraction = 0.7
)

Arguments

data1	The first horizontal component of acceleration ground motion, in g
data2	The second horizontal component of acceleration ground motion, in g
period	A array of oscillator periods. -1 is for PGV, 0 is for PGA. The default is NA, which would use NGA-West2 111 + 2 (PGV and PGA) periods.
damping	Damping ratio.
combine_index	It specifies the value of xx for RotDxx. xx is in percent, e.g., 0 is used for RotD00, 50 is for RotD50, and 100 is for RotD100. The default is 50.
dt	Time step of two time series. We assume that the two time series have the same time step.
Interpolation_factor	The interpolation factor. The specific value depends on sampling rate, the detailed explanation is described in the PEER report. Users can give their desired value, or can use defult "auto", which will compute Interpolation_factor according to time step automatically.
fraction	A fraction for subset selection to speed up calculation. 0 is using all data. 0.7 is recommended for PSA RotD50 if the input data are Sinc interpolated (default); 0.5 is recommended if PSA GMRotI50 is also interested; 0.0 should be used regarding for PSA RotD00

Value

A list is returned with RotDxx for the specified combine_index percentile. The units for returned PGV and PGA/PSA are cm/s and g, respectively.

wltcwpf/RCTC documentation built on March 5, 2023, 11:01 p.m.