Evaluation the Performance and Seismic Comparison of Steel Moment Dual Systems in Rocking Frames with CBF and EBF Bracing
Subject Areas : Analysis of Structure and Earthquake
Ali Parvari
1
(Islamic Azad University, Khomeyn)
Arman Beglar
2
(Azad University of Khomein Branch, Khomein‎)
Keywords: seismic performance, concentrically braced frame, Self-centering &lrm, motion, eccentrically braced frames, near-field earthquake,
Abstract :
In recent years, considering vertical movement in structures, which is known as self-centering motion, is one of the methods used to dissipate the earthquake energy. In this study, 4-, 8-, and 12-Story steel structures with special concentrically braced frame (SCBFs) and eccentrically braced frames (SEBFs) were considered in order to investigate the effect of self-centering motion under seven near-field earthquakes using Sap 2000 software. The results of this research indicate that considering the self-centering motion, the behavior of structures are changing in SCBFs and SEBFs. In , 4-, 8-, and 12-Story SEBFs structures with considering the self-centering motion, the column and bracing forces were increased which this was different with SCBFs structures. Considering the self-centering motion, more plastic joints are formed in the beams. Therefore, in the self-centering of the columns, the beams outside the bay are more affected. In general, the results indicate that the self-centering motion is better in the SCBFs.
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