Experimental flexural behavior of SMA-FRP reinforced concrete beam

Adeel Zafar, Bassem O Andrawes

Research output: Contribution to journalArticlepeer-review

Abstract

The most critical drawback in currently used steel reinforcement in reinforced concrete (RC) structures is susceptibility to accumulation of plastic deformation under excessive loads. Many concrete structures due to damaged (yielded) steel reinforcement have undergone costly repairs and replacements. This research presents a new type of shape memory alloy (SMA)-based composite reinforcement with ability to withstand high elongation while exhibiting pseudoelastic behavior. In this study, small diameter SMA wires are embedded in thermoset resin matrix with or without additional glass fibers to develop composite reinforcement. Manufacturing technique of new proposed composite is validated using microscopy images. The proposed SMA-FRP composite square rebars are first fabricated and then embedded in small scale concrete T-beam. 3-point bending test is conducted on manufactured RC beam using a cyclic displacement controlled regime until failure. It is found that the SMA-FRP composite reinforcement is able to enhance the performance of concrete member by providing re-centering and crack closing capability.

Original languageEnglish (US)
Pages (from-to)341-355
Number of pages15
JournalFrontiers of Structural and Civil Engineering
Volume7
Issue number4
DOIs
StatePublished - Dec 2013

Keywords

  • Composite
  • Concrete
  • Fiber reinforced polymer
  • Re-centering
  • Scanning electron microscopy
  • Shape memory alloys

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture

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