Abstract
This paper presents a concept for semi-active control of earthquake induced vibrations in building frames based on smart stressing of building frame using shape memory alloys. Smart cables composed of (Ni-Ti) shape memory alloy (SMA) wires are proposed to be installed externally with concrete building frame elements. In principle, the cables can be designed such that the SMA wires are elongated beyond their plastic limit under the action of earthquake loads on the frame. Upon regulated electrical heating, the Ni-Ti SMA wires will undergo a martensite to austenite phase transformation resulting in large shrinkage strains. The strain energy thus induced can be used to generate a significantly effective control forces in the building frame. The present study proposes the implementation of such smart stressing cables constituted with Ni-Ti SMA wires appropriately connected to concrete building frame members which can be electrically actuated to induce desired variable control forces in building frame. The concept is analytically investigated by numerical simulations of proposed semi-active control scheme in an idealized eight story concrete building frame model.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
