Title: Analysis and design of a hybrid re-centring energy dissipation device for steel moment frames
Authors: Wenke Tang; Eric M. Lui
Addresses: WSP, One Penn Plaza 2nd Floor, New York City, NY 10119, USA ' Department of Civil and Environmental Engineering, Syracuse University, Syracuse, NY 13244-1240, USA
Abstract: In earthquake resistant design, limiting elastic and inelastic deformations and maximising energy dissipation are important design considerations. In this paper, the numerical modelling, application and design of a device that makes use of the hysteretic response of shape memory alloys (SMA) and energy dissipative capability of a viscous fluid damper for energy dissipation and the superelasticity effect of SMA for re-centring are presented. After the basic workings and numerical modelling of the device are described, a design procedure based on a modified equivalent lateral load method is introduced. A design example is then given to demonstrate that the proposed device can effectively reduce peak interstory and peak top story drifts for a four-story moment frame subject to strong ground motions from 6.28% and 4% to 0.90% and 0.77%, respectively; as well as decrease the residual interstory and residual peak story drifts from 4.34% and 2.3% to 0.12% and 0.14%, respectively.
Keywords: shape memory alloys; SMA; structural re-centring; energy dissipation device; earthquake resistant design; steel moment frames.
International Journal of Structural Engineering, 2022 Vol.12 No.3, pp.209 - 239
Received: 11 Jan 2021
Accepted: 03 Sep 2021
Published online: 01 Jul 2022 *