Uniaxial compression behavior of actively confined concrete using shape memory alloys

Moochul Shin, Bassem O Andrawes

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This experimental study focuses on investigating the uniaxial compressive behavior of concrete cylinders confined using a novel active confinement technique. Shape memory alloy (SMA) spirals are utilized to apply external confining pressure on the concrete cylinders. Thermomechanical tests are conducted to determine the recovery stress of the used spirals. In addition the uniaxial compressive behavior of the actively confined concrete using SMA spirals and hybrid wraps made with Glass Fiber Reinforced Polymers (GFRP) and SMA wires is studied and compared with unconfined and passively confined concrete. The results of the study show that SMA spirals are effective in applying large and reliable active confining pressure on concrete. The confining pressure produced by SMAs results in a significant increase in concrete strength and ductility compared to unconfined and passively confined cylinders.

Original languageEnglish (US)
Title of host publicationProceedings of the 2009 Structures Congress - Don't Mess with Structural Engineers
Subtitle of host publicationExpanding Our Role
Pages2710-2717
Number of pages8
DOIs
StatePublished - Sep 14 2009
Event2009 Structures Congress - Don't Mess with Structural Engineers: Expanding Our Role - Austin, TX, United States
Duration: Apr 30 2009May 2 2009

Publication series

NameProceedings of the 2009 Structures Congress - Don't Mess with Structural Engineers: Expanding Our Role

Other

Other2009 Structures Congress - Don't Mess with Structural Engineers: Expanding Our Role
CountryUnited States
CityAustin, TX
Period4/30/095/2/09

Keywords

  • Active confinement
  • Ductility
  • Fiber Reinforced Polymers
  • Shape Memory Alloys

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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