Abstract
An examination is made of correlations between orthogonal horizontal components of earthquake ground motions and their influence on the seismic response of a simple asymmetric structure. Directional correlations of the ground motions are examined in the frequency domain using cross-spectral density analysis. Root-mean-square (RMS) displacement responses for translational and rotational degrees-of-freedom are computed for an asymmetric structure subjected to an ensemble of earthquake ground motion records. The influence of directional correlations of the ground motions on the seismic response of the structure are evaluated by comparing the RMS displacements with those computed for independently applied single axis inputs that exclude cross-spectra effects.
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