Investigating Effect of Friction-yielding Top Plate of Rigid Connections on Seismic Response of Special Moment Frames

Document Type : Original Article

Authors

1 Department of Civil Engineering, Arak Branch, Islamic Azad University, Arak, Iran

2 School of Civil Engineering, College of Engineering, University of Tehran, Tehran, Iran

3 University of Ottawa, Canada

4 Department of Civil Engineering, Aligudarz Branch, Islamic Azad University, Aligudarz, Iran

Abstract

Acceptable seismic performance, ease and low cost in design and implementation are advantages of passive dampers, but fixed performance parameters corresponding to the type and amount of input energy reduce their efficiency. In this research, a new two-level passive damper in rigid connections with variable stiffness, strength, and energy absorption capacity is introduced and its seismic performance in 5, 10, and 15-story steel frames is evaluated with nonlinear dynamic analysis using SAP2000 software. The results show that, despite the different dynamic parameters in the selected seismic records, such as the frequency content and duration of ground motions, the performance of the structures under all earthquakes has improved significantly, which confirms the effectiveness of the proposed damper in rigid connections on improving the seismic performance structures. Besides, results prove the proposed damper effectiveness on decreasing the structural response such as maximum displacement and base shear. The average displacements reduced by 61%, 51% and 16% compared to those of BSEEP-4ES connections for the 5, 10 and 15-story frames, respectively. Besides, maximum base shear forces reduced by average of 29% and 15% compared to those of BSEEP-4ES connections for the 5 and 10-story frames, respectively.

Graphical Abstract

Investigating Effect of Friction-yielding Top Plate of Rigid Connections on Seismic Response of Special Moment Frames

Keywords

Main Subjects

References

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International Journal of Engineering
Volume 37, Issue 8
TRANSACTIONS B: Applications
August 2024
Pages 1580-1591

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