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6 April 2009 Cyclic behavior of superelastic shape memory alloy wire for innovative precast concrete frame connections
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Abstract
Smart precast concrete frame connection based on unbonded shape memory alloy (SMAPCFC) was proposed as a possible seismic resistance measure for reinforced concrete frame buildings. To investigate the restoring force characteristics of SMA wire, cyclic tensile tests on superelastic NiTi SMA wires with three diameters were carried out. The effects of the different loading conditions, namely: cyclic loading-unloading number, strain amplitude, loading frequency and ambient temperature, on the mechanical behavior described by some fundamental quantities, such as energy dissipation per cycle, secant stiffness, equivalent damping, residual strain, were examined. The temperature changes of the SMA wires due to the latent heat under different loading conditions were also discussed.
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Hui Qian, Hong-nan Li, Gang-bing Song, and Huai Chen "Cyclic behavior of superelastic shape memory alloy wire for innovative precast concrete frame connections", Proc. SPIE 7288, Active and Passive Smart Structures and Integrated Systems 2009, 728819 (6 April 2009); https://doi.org/10.1117/12.817560
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