AN EVALUATION OF ENERGY RESPONSE AND CUMULATIVE PLASTIC ROTATION DEMAND IN STEEL MOMENT-RESISTING FRAMES THROUGH DYNAMIC/STATIC PUSHOVER ANALYSES

Abstract

In the energy-based design approach, the seismic design is performed through the balancing of the energy input and the energy dissipation of the structure. The energy dissipation is represented by the hysteretic energy dissipation capacity defined as the total area enclosed in the force-deformation curves under cyclic loading. Thus, the energy-based design approach considers the Cumulative effect of the seismic loading of the structure. The cumulative damage in the structural members can be expressed in terms of cumulative plastic rotation (CPR). The CPR capacity plays an important role in determining the hysteretic energy dissipation capacity of: a steel moment connection. This study investigated the energy response and the CPR capacity and demand through dynamic pushover analyses on steel moment-resisting frames. The results were compared with the ones obtained from the pushover analysis. Copyright (C) 2008 John Wiley & Sons, Ltd.