Numerical Simulation of a Telescopic Metallic Yielding Damper

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Davoodi, Vahid | 2014

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Type of Document: M.Sc. Thesis
Language: English
Document No: 47912 (53)
University: Sharif University of Technology, International Campus, Kish Island
Department: Science and Engineering
Advisor(s): Eskandari, Morteza
Abstract:
In this study, a new type of metallic yielding damper called Telescopic damper is proposed and analyzed numerically. The damper comprises of three concentric steel tubes connected together by lead shear keys. The relative axial deformation of steel tubes under axial forces results in shear deformation and yielding in lead shear keys and dissipates energy. The inner steel tube has a lock which limits its movement to some certain extent and beyond this limit the outer tube activates. Therefore, a multi-linear force-deformation behavior with two different yield plateaus is expected for the introduced telescopic damper. The multi-level yield plateaus of damper makes it effective in both low and high level earthquakes. The finite element analysis of damper under harmonic loading is performed using ABAQUS program. The force-displacement curves, stress contours, deformed shape, and efficiency factor of damper for various loading amplitudes are reported and discussed. The telescopic damper can be installed at the end of bracing members in steel structures as an effective energy dissipating system
Keywords:
Numerical Simulation ; Passive Control ; Earthquake ; Energy Dissipation ; Metallic Yield Damper ; Telescopic Damper

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