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PRESTRESSING OF SIMPLY SUPPORTED CONCRETE BEAM WITH NITINOL SHAPE MEMORY ALLOY

Kotamala, Sreenath
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1091806884

Abstract Details

2004, Master of Science, University of Toledo, Civil Engineering.
The importance of advanced material systems is rapidly increasing. New demands are placed by our society and environment on the development of new technological systems. Smart material systems play an important role in innovative technology, providing materials that can act as both control elements and structural members. To address the problems of controlling the structural deflection, research is very essential on smart materials. Shape memory alloys (SMA) have been major elements of smart materials and structures. Shape memory alloys are novel materials that have the ability to return to a predetermined shape when subjected to the appropriate thermal procedure. SMAs are widely used for controlling the structural deflection. This research addresses the use of Nitinol shape memory alloy to increase the flexural strength of simply supported concrete beams. The shape memory property of the Nitinol wire was used in prestressing the concrete beam. The prestressed Nitinol wire was placed in the concrete beam with an eccentricity. Electrical current was used to heat that alloy to above its austenite finish temperature. When the temperature was raised high enough to cause the shape memory effect (SME) in Nitinol, the prestressing force was transferred to the beam. A total of ten concrete beams were tested for flexure strength in accordance with the ASTM C78. The flexural strength of the concrete beam was increased when prestressed Nitinol wire was placed in the concrete, when compared with the plain concrete beam and with un-prestressed concrete beam. Simple beam bending theory was used to determine how much prestress was transferred during the electrical heating of the Nitinol shape memory alloy.
Mark Pickett (Advisor)
75 p.
Engineering, Civil
Prestressing; Shape Memory Alloys; Nitinol; NiTi Shape Memory Alloys

Recommended Citations

Citations

  • Kotamala, S. (2004). PRESTRESSING OF SIMPLY SUPPORTED CONCRETE BEAM WITH NITINOL SHAPE MEMORY ALLOY [Master's thesis, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1091806884

    APA Style (7th edition)

  • Kotamala, Sreenath. PRESTRESSING OF SIMPLY SUPPORTED CONCRETE BEAM WITH NITINOL SHAPE MEMORY ALLOY. 2004. University of Toledo, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=toledo1091806884.

    MLA Style (8th edition)

  • Kotamala, Sreenath. "PRESTRESSING OF SIMPLY SUPPORTED CONCRETE BEAM WITH NITINOL SHAPE MEMORY ALLOY." Master's thesis, University of Toledo, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1091806884

    Chicago Manual of Style (17th edition)

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This open access ETD is published by University of Toledo and OhioLINK.