We present correlation coefficient estimates between a number of ground motion intensity measures (IMs), as measured from the NGA-West2 database, with focus on the correlation of vertical–vertical and vertical–horizontal ground motion components. The IMs considered include spectral accelerations with periods from 0.01 to 10 s, peak ground acceleration, peak ground velocity, and significant duration (for 5%–75% and 5%–95% definitions). To facilitate their use, parametric equations are also fitted to the correlation models. Finally, the dependence of the obtained correlation coefficients to magnitude, distance, and Vs30 is evaluated.
Correlation of spectral acceleration values of vertical and horizontal ground motion pairs
Mohsen Kohrangi, RED Risk Engineering + Development, Pavia, Italy, Via Giuseppe Frank 38, 27100 Pavia, Italy. Email: firstname.lastname@example.org
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Mohsen Kohrangi, Athanasios N Papadopoulos, Paolo Bazzurro, Dimitrios Vamvatsikos; Correlation of spectral acceleration values of vertical and horizontal ground motion pairs. Earthquake Spectra 2020;; 36 (4): 2112–2128. doi: https://doi.org/10.1177/8755293020919416
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