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Behavior of Concrete Driven by Uniaxially Embedded Shape Memory Alloy Actuators |
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| Authors: | Zongcai Deng Qingbin Li Anquan Jiu Lei Li |
| Affiliation: | 1Postdoctoral Research Fellow, Dept. of Hydraulic Engineering, Tsinghua Univ., Beijing 100084, P.R. China; currently, Associate Professor, School of Civil Engineering, Beijing Polytechnic Univ., Beijing 100022, P.R. China. 2Professor, Dept. of Hydraulic Engineering, Tsinghua Univ., Beijing 100084, P.R. China. 3Postgraduate Research Assistant, Dept. of Hydraulic Engineering, Tsinghua Univ., Beijing 100084, P.R. China. 4Doctoral Research Assistant, Dept. of Hydraulic Engineering, Tsinghua Univ., Beijing 100084, P.R. China. |
| Abstract: | The behavior of a concrete specimen uniaxially embedded with a shape memory alloy (SMA) wire actuated by electrical current is studied in this paper. The main factors influencing the axial strain of the concrete specimen were examined through a sophisticated experimental program. The experimental results indicate that the SMA actuator can be employed as a way of prestressing for axial concrete specimens and can be used for controlling axial strain of concrete specimens. Also the influences of initial prestrain of SMA wires, modes activating electrical current, the actuation times, etc., on the axial strain behavior of concrete specimen are significant. |
| Keywords: | Concrete Compression Prestressing Temperature |