Experimental Study of Model Cable Inter-supported by a Shape Memory Alloy Wire
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Bibliographic Details
| Author(s): |
H. J. Zhou
L. M. Sun G. Z. Yao F. Xing L. B. Zhou |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Conference: Bridges and Structures Sustainability - Seeking Intelligent Solutions, Guangzhou, China, 8-11 May 2016 | ||||
| Published in: | IABSE Conference, Guangzhou, China, 8 – 11 May 2016 | ||||
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| Page(s): | 448-455 | ||||
| Total no. of pages: | 8 | ||||
| Year: | 2016 | ||||
| DOI: | 10.2749/222137816819258735 | ||||
| Abstract: |
This study proposed and tested a system of a stay cable transversely attached with a tensioned Shape Memory Alloy (SMA) wire. Cyclic tension loading test of pre-tensioned 0.5mm diameter SMA wire was firstly conducted. The effective modulus and energy dissipation per unit volume were derived from the tested hysteretic loops of pre-tensioned SMA wire. The pre-strain effects on the effective modulus and energy dissipation of SMA wire was discussed based on the test results. Then vibration mitigation experiment of a model stay cable transversely attached with a tensioned SMA wire was conducted. The strain level of SMA wire was calculated from the stay cable force increment. Both the 1st and the 2nd in-plane vibration mode were tested in the experiment. The effects of the SMA wire installation location and pre-strain on frequency and damping ratio of the model-cable-SMA-wire system were discussed. The test results confirmed there was an optimal pre-strain of SMA wire for the maximum mode damping larger than 0.50%. The study confirmed great potential application of pre-strained SMA wire as cross-ties for stay cable vibration mitigation. |
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| Keywords: |
stay cable damping frequency SMA pre-strain
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