Abstract
Over the years, with the construction of increasingly longer and lighter bridges, dynamic behavior has become a limiting factor in the design of these structures and the significant interest in developing structural vibration control systems. Among the variety of materials currently used for vibration suppression, the use of shape memory alloys (SMAs) sounds as an uncommon solution. These materials have gained popularity due to their ability to undergo large reversible deformations, coupled with their energy dissipation properties. In this context, this study aims to achieve passive vibration control in a scaled-down prototype of a cable-stayed bridge using superelastic mini-springs made from NiTi (Nitinol) SMA. In this study, dynamic analyses of the structure based on the experimental results showed up to a 75% reduction in force transmissibility in free vibration compared to a similar structure with steel springs. In forced vibration, the force transmissibility reduction reached up to 85.5%. It was concluded that SMA mini-springs have the capability to dissipate vibrational energy for application in bridge structures.
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