Analysis and Conceptual Design of a Novel Metallic Yielding Damper

Please enable javascript in your browser.

keshtiaray, Masoud | 2015

606 Viewed

Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 47199 (09)
University: Sharif University of Technology
Department: Civil Engineering
Advisor(s): Eskandari, Morteza
Abstract:
In this thesis, three new metallic-yielding dampers for dissipation of energy in structures are introduced and studied. The advantages of dissipation of energy from torsional yielding in comparison to tensile yielding is verified by performing both monotonic and cyclic tests on three aluminum alloys specimens and a mild steel specimen. The experiments confirm that the energy absorption of steel in torsion is much higher than that in tension. Three different mechanisms are introduced to transform the axial movement into the torsional rotation. Each mechanism is studied in details. The first two mechanisms can be mounted at the end of bracings and the third one is installed at the deck-substructure interface in bridges. The level of energy absorption and effectiveness factor of each mechanism are studied by employing the structural mechanics concepts and the obtained stress-strain curves from the performed experiments. The basic design of each mechanism is performed and the preliminary dimensions of composing members are given. Finally, all three mechanisms are compared and their advantages and disadvantages are discussed
Keywords:
Energy Dissipation ; Torsional Damper ; Structural Control ; Metallic-Yielding Dampers ; Torsional Yielding

No TOC