Superelastic shape memory alloy composite bars for reinforcing concrete structures

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.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Civil Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2010

Author dc:creator

• Wierschem, Nicholas E.

Contributors dc:contributor

• Andrawes, Bassem

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

Statement dc:rights

• Copyright 2009 Nicholas E. Wierschem

Language dc:language

en

Handle dc:identifier

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

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/14631