Superelastic shape memory alloy composite bars for reinforcing concrete structures

Wierschem, Nicholas E.

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https://hdl.handle.net/2142/14631 Copy

Description

Title

Superelastic shape memory alloy composite bars for reinforcing concrete structures

Author(s)

Wierschem, Nicholas E.

Issue Date

2010-01-06T16:20:08Z

Director of Research (if dissertation) or Advisor (if thesis)

Andrawes, Bassem

Doctoral Committee Chair(s)

Andrawes, Bassem

Department of Study

Civil & Environmental Eng

Discipline

Civil Engineering

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

• reinforced concrete
• shape memory alloy
• Superelastic Shape Memory Alloys (SMA)
• Fiber Reinforced Polymer (FRP)
• ductility
• 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.

Graduation Semester

2009-12

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http://hdl.handle.net/2142/14631

Copyright and License Information

Copyright 2009 Nicholas E. Wierschem

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