Résumé:
This research addresses the influence of the seismic component of rotation on the torsional response of building structures subjected to earthquake ground motions. Furthermore, the increase an equivalent additional eccentricity due to the action of this component is estimated. For this purpose, a rotational acceleration component is generated from the translational ones and applied to both symmetric and asymmetric structures using nonlinear dynamic analysis. The obtained results show clearly the considerable effect of the torsional seismic component on the structural response. The estimated eccentricity of the studied cases exceeded the value recommended by several seismic codes as an accidental eccentricity.
