سال انتشار: ۱۳۹۱

محل انتشار: نهمین کنگره بین المللی مهندسی عمران

تعداد صفحات: ۷

نویسنده(ها):

Mohammad Reza Hoseinzadeh – Department of Civil Engineering, Behbahan Branch, Islamic Azad University, Behbahan
Ali Edalat Behbahani –
Iraj Rasoolan –

چکیده:

Most of seismic codes propose an experimental equation, distributed for different structural systems, to present fundamental period. To make sure for required modifications on seismic design codes, one hundred eighty concrete moment resisting frames with steel eccentric braces giving variety in number of stories, bracing kinds of spans, length of link beam and number of spans have been considered to capture vibration period by performing two-dimensional nonlinear pushover analyses. Pushover Analyses havebeen conducted using SAP-2000 program, which can consider material nonlinearities almost near reality. At the end, fundamental period and effective fundamental period both derived by analysis and the experimental has been discussed concerning bracing kind of spans, length of link beam and height ofstructure. This research has suggested an analytical equation based on analysis to present fundamental period. Analytical results confirm the validity of the experimental equation for presenting fundamental period in the case of reminded frames