Evaluation of Seismic Behavior for Moment Frames and Eccentrically Braced Frames Due to Near-Field Ground Motions

This research aims to evaluate seismic behavior of moment frames (MF) and eccentrically braced frames (EBF), two common systems in most of the steel codes, due to far-field and near-field ground motions and to propose practical technique for acquiring demand distributions. Much intensive amounts and distinct patterns of demand are recognized according to near-field records. Also, the results demonstrate distinctive dissimilarities in demand distributions, their rate of changes and intensities and different higher mode participation patterns in MF and EFF systems. In addition, calculated R factors and these parameters in ASCE and UBC codes were compared thoroughly in this study.