pystrata.motion.CompatibleRvtMotion¶

class pystrata.motion.CompatibleRvtMotion(osc_freqs, osc_accels_target, duration=None, osc_damping=0.05, event_kwds=None, window_len=None, peak_calculator=None, calc_kwds=None)[source]¶

RVT motion based on user specified acceleration response spectrum and duration.

__init__(osc_freqs, osc_accels_target, duration=None, osc_damping=0.05, event_kwds=None, window_len=None, peak_calculator=None, calc_kwds=None)[source]¶

Initialize the motion.

Parameters:

osc_freqs (array_like) – Frequencies of the oscillator response (Hz).
osc_accels_target (array_like) – Spectral acceleration of the oscillator at the specified frequencies (g).
duration (float, optional) – Duration of the ground motion (sec). If None, then the duration is computed using the event_kwds.
osc_damping (float, optional) – Fractional damping of the oscillator (dec). Default value is 0.05 for a damping ratio of 5%.
event_kwds (Dict, optional) – Keywords passed to SourceTheoryMotion and used to compute the duration of the motion. Either duration or event_kwds should be specified.
window_len (int, optional) – Window length used for smoothing the computed Fourier amplitude spectrum. If None, then no smoothing is applied. The smoothing is applied as a moving average with a width of window_len.
peak_calculator (Calculator, optional) – Peak calculator to use. If None, then the default peak calculator is used. The peak calculator may either be specified by a [pyrvt.peak_calculators.Calculator][] object, or by the initials of the calculator using [pyrvt.peak_calculators.get_peak_calculator][].
calc_kwds (dict, optional) – Keywords to be passed during the creation the peak calculator. These keywords are only required for some peak calculators.

Methods

`__init__`(osc_freqs, osc_accels_target[, ...])	Initialize the motion.
`calc_attenuation`(min_freq[, max_freq])	Compute the site attenuation (κ) based on a log-linear fit.
`calc_osc_accels`(osc_freqs[, osc_damping, ...])	Pseudo-acceleration spectral response of an oscillator.
`calc_peak`([transfer_func])	Compute the peak response.

Attributes

`angular_freqs`
`arias_intensity`	Arias intensity [m/s].
`cav`	Cumulative absolute velocity [m/s].
`duration`	Duration of the ground motion for RVT analysis.
`fourier_amps`	Acceleration Fourier amplitude values (g-sec).
`freqs`	Frequency values (Hz).
`pga`	Peak ground acceleration [g]
`pgv`	Peak ground velocity [cm/sec].