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Title:Superelastic shape memory alloy composite bars for reinforcing concrete structures
Author(s):Wierschem, Nicholas E.
Advisor(s):Andrawes, Bassem
Contributor(s):Andrawes, Bassem
Department / Program:Civil & Environmental Eng
Discipline:Civil Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):reinforced concrete
shape memory alloy
Superelastic Shape Memory Alloys (SMA)
Fiber Reinforced Polymer (FRP)
energy dissipation
Abstract:Superelastic shape memory alloys (SMAs) are a class of metallic alloys that have the unique property of being able to undergo large amounts of plastic strain while remaining elastic and dissipating energy. This thesis explored a strategy for adding ductility and energy dissipation to FRP reinforcing bars through the use of SMA-fiber reinforced polymer (SMA-FRP) composites, an innovative type of composite that consists of a polymer matrix reinforced with small diameter superelastic SMA wires with and without additional conventional fiber reinforcement. In this study an analytical model for the behavior of SMA-FRPs was developed based on experimental results. This model was then used in a parametric study to determine the effect of the composition of the composite on its performance. After which, the SMA-FRP bars were explored as reinforcement for concrete structures with analyses at the section, substructure, and structural levels. From this study it was found that SMA-FRP reinforcing bars behave in a ductile manner and are capable of dissipating energy. Furthermore, it was found that SMA-FRP bars have more potential to improve the ductility and energy dissipation capability of concrete structures compared to conventional FRP bars.
Issue Date:2010-01-06
Rights Information:Copyright 2009 Nicholas E. Wierschem
Date Available in IDEALS:2010-01-06
Date Deposited:December 2

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