Evaluation of the Higher Modes Contribution in the Seismic Demands of Buildings Subjected to Far-Field and Near-Field Ground Motions

Instead of the complicated non-linear response history analysis (NL-RHA), engineers are more likely to use simplified non-linear static procedures (NSPs). Because of various deficiencies of the conventional pushover procedures, different researchers presented advanced NSPs. Some of these advanced NSPs used first two modes of the structure and the others offered using more than first two modes. In this study, the higher mode contributions in the structural responses are investigated through NSPs including modal pushover analysis (MPA) and modal shear-based pushover (MSP) procedures for far-field and near-field ground motions. Finally, the optimized number of considered modes for different situations is suggested.