The effect of far field and near field earthquakes on the hysteresis energy and relative displacement of steel moment resisting frame structures

Abstract

Various types of research studies show that other parameters are also involved in seismic response of structures and only the force–displacement issue in elastic or even bilinear elastic perfectly plastic states is not capable of justifying the entire seismic behaviors of structures. Therefore, researchers are seeking to propose a new method in the seismic design of structures. In this regard and during the last two decades, the subject of energy has been highly taken into consideration, because by advances obtained in this method a lot of proposed parameters and behaviors in seismic design of structures have become justifiable and applicable in design process. In the current research, nonlinear dynamic analysis has been conducted under Loma Prieta, Landers, and Northridge earthquakes in far and near field on three ordinary moment resisting frames structures with 3, 6, and 12 stories in SAP2000 (VER 16.0.0) software. Hysteresis energy distribution and maximum relative displacements in buildings stories were extracted. The obtained results showed that near-fault earthquakes result in larger relative displacements of stories than far-fault.