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A simple hybrid damping device with energy‐dissipating and re‐centering characteristics for special structures
Author(s) -
Jalaeefar A.,
Asgarian B.
Publication year - 2014
Publication title -
the structural design of tall and special buildings
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.895
H-Index - 43
eISSN - 1541-7808
pISSN - 1541-7794
DOI - 10.1002/tal.1050
Subject(s) - sma* , dissipation , shape memory alloy , structural engineering , ductility (earth science) , brace , bracing , tension (geology) , energy (signal processing) , damper , materials science , compression (physics) , computer science , mechanical engineering , engineering , composite material , physics , quantum mechanics , creep , algorithm , thermodynamics
SUMMARY The usage of special materials with unique properties in seismic resistant structures has increased since the 1994 Northridge earthquake to overcome limited energy dissipation and ductility. Among them, shape memory alloy (SMA) is a unique metallic alloy that has the ability to undergo large deformations and revert back to its original un‐deformed shape. Thus, a simple and practical hybrid damping device equipped with SMA that provides both energy‐dissipating and re‐centering (strain‐recovering) capabilities is developed and evaluated in the present paper. Quasi‐static loading tests on Nitinol bars are conducted to obtain their mechanical properties in tension and compression. The optimum proportion of SMA and steel in the device is achieved through analyzing various models. Placing the proposed device in semi‐rigid bracing members of special structures will localize the energy‐dissipating and ductility while providing the brace with strain‐recovering capability. Copyright © 2012 John Wiley & Sons, Ltd.