francolt/reqpy

Response spectral matching of horizontal ground motion components to an orientation-independent spectrum (RotDnn)

REQPY

A module of python functions to perform spectral matching of 2 horizontal components to a RotDnn target spectrum as described in Montejo (2020). The functions included can also be used to perform single component matching (Montejo and Suarez 2013), perform baseline correction (Suarez and Montejo 2007), and generate single component, rotated and RotDnn spectra.

examples: https://youtu.be/1SFzuP-fjPg

cite the paper: Montejo, L. A. (2020). Response spectral matching of horizontal ground motion components to an orientation-independent spectrum (RotDnn). Earthquake Spectra (https://doi.org/10.1177/8755293020970981)

cite the code:

Other references

Montejo, L. A., & Suarez, L. E. (2013). An improved CWT-based algorithm for the generation of spectrum-compatible records. International Journal of Advanced Structural Engineering, 5(1), 26.

Suarez, L. E., & Montejo, L. A. (2007). Applications of the wavelet transform in the generation and analysis of spectrum-compatible records. Structural Engineering and Mechanics, 27(2), 173-197.

List of functions included in the module

*REQPYrotdnn: Response spectral matching of horizontal ground motion components to an orientation-independent spectrum (RotDnn)

*REQPY_single: CWT based modification of a single component from a historic record to obtain spectrally equivalent acceleration series

*ResponseSpectrum: decides what approach to use to estimate the response spectrum based on the specified damping value (>=4% frequency domain, <4% piecewise)

*RSPW: Response spectra using a piecewise algorithm

*RSFD: Response spectra (operations performed in the frequency domain)

*ResponseSpectrumTheta: decides what approach to use to estimate the rotated response spectra based on damping value (>=4% frequency domain, <4% piecewise)

*RSFDtheta: Rotated response spectra, returns the spectra for each angle accommodated in a matrix (operations performed in the frequency domain)

*RSPWtheta: Rotated response spectra, returns the spectra for each angle accommodated in a matrix (piecewise approach)

*rotdnn: computes rotated and rotdnn spectra

*basecorr: Performs baseline correction

*baselinecorrect: Performs baseline correction (iteratively calling basecorr)

*cwtzm: Continuous Wavelet Transform using the Suarez-Montejo wavelet via convolution in the frequency domain

*zumontw: Generates the Suarez-Montejo Wavelet function

*getdetails: Generates the detail functions from the wavelet coefficients

*CheckPeriodRange: Verifies that the specified matching period range is doable

*load_PEERNGA_record: Load record in .at2 format (PEER NGA Databases)