University of Illinois Urbana-Champaign

Superelastic shape memory alloy composite bars for reinforcing concrete structures

Wierschem, Nicholas E.

Content Files
1_Wierschem_Nicholas.pdf

Permalink

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

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
Date of Ingest
2010-01-06T16:20:08Z
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
Permalink
http://hdl.handle.net/2142/14631
Copyright and License Information
Copyright 2009 Nicholas E. Wierschem

Owning Collections

Graduate Dissertations and Theses at Illinois PRIMARY
Graduate Theses and Dissertations at Illinois
Dissertations and Theses - Civil and Environmental Engineering