Analysis and design of a hybrid re-centring energy dissipation device for steel moment frames Online publication date: Fri, 01-Jul-2022
by Wenke Tang; Eric M. Lui
International Journal of Structural Engineering (IJSTRUCTE), Vol. 12, No. 3, 2022
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.
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