Pilot Study of Behavior of Concrete Beams Reinforced with Shape Memory Alloys

The authors discuss Nitinol (NiTi), a shape memory alloy, in the context of its superelastic behavior when used in concrete beam reinforcement. The authors investigated concrete beam permanent deformation reduction and recovery through use of NiTi. NiTi reinforced small-scale concrete beams were tested using half-cycle loads, with a reinforcement ratio variability of 0.1 to approximately 0.9%. Study results indicate that NiTi reinforced beam average residual displacement, when compared with steel reinforced test beam, was less than one-fifth. Steel reinforced test beam stiffness, however, was higher than NiTi reinforced test beams. A series of hybrid beam load-deflection relationships were analytically studied. Due to their relatively high stiffness, a better design choice was found to be a hybrid system in which plastic bars were reinforced with a combination of NiTi and either carbon fiber or high strength steel.

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  • Authors:
    • Saiidi, M Saiid
    • Sadrossadat-Zadeh, Mahmoud
    • Ayoub, Chadi
    • Itani, Ahmad M
  • Publication Date: 2007-6

Language

  • English

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Filing Info

  • Accession Number: 01051715
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 8 2007 9:36AM