Asymmetric multistorey R/C frame structures: push-over versus nonlinear dynamic analysis

摘要

The paper investigates the applicability of 3D push-over analysis for the seismicanalysis of plan asymmetric structures. As a test example a symmetric four-storey r/c frame buildingdesigned according to the European seismic code provisions (Eurocode 8) was selected. For theasymmetric building variant the asymmetry was introduced by shifting the center of masses. Thenon-linear dynamic analysis results obtained for three selected earthquake ground motions (two differentscalings) were compared with the push-over analysis results. In all cases the push-overanalyses are performed up to the maximum top displacement obtained by the nonlinear dynamicanalyses (measured in center of masses). Four different points of load application for the push-overanalyses are considered and the deflection profiles and the floor torsional rotations of the buildingare compared with the maximum response obtained by nonlinear dynamic analysis. As a referencealso the maximum response of symmetric building variant is presented.