Application of Incremental Dynamic Analysis Method in Determining Seismic Effective Parameters in Special Steel Flexural Frame (SMRF) System

Ebrahim Pajuhniya¹

1) Master of Science in Civil Engineering, Islamic Azad University, Shahrekord Branch, Shahrekord, Iran Supervising Engineer, General Directorate of School Renovation, Isfahan Province, Isfahan, Iran

IOI Code : AACH-AAGFCB
Publication : 7th.International Conference & 8th.National Conference on Civil Engineering, Architecture, Art and Urban Design(8iccacs.ir)
Abstract :
    Nowadays, the use of special steel flexural frames in medium-rise steel buildings is one of the dynamic methods that is known as a system resistant to earthquake forces. One of the important parameters of seismic responses to earthquake forces is the behavior factor, R, which specifically describes the ability of the structural system to dissipate earthquake energy and cause nonlinear structural collapse. First, in this study, the calculation of the additional resistance factor is carried out, then the ductility factor and behavior factor are calculated from the special steel flexural frame system. To do this, nonlinear static analysis, linear dynamic analysis and incremental dynamic analysis, IDA, have been used and studies on 3, 5 and 7-story frames have been carried out using Opensees software. Then, the seismic performance of this system under 10 world-famous earthquake records has been investigated using the results of incremental dynamic analysis in 3 frames of 3, 5 and 7 stories designed on soil. Then, the fragility curves and the mean annual frequency for different performance levels have been calculated using the PSDA method.

Keywords : special steel flexural frame incremental dynamic analysis pushover nonlinear static analysis seismic performance seismic demand fragility curve