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Optimization of the Curved Metal Damper to Improve Structural Energy Dissipation Capacity

Kim, Young-Chan and Mortazavi, Seyed Javad and Farzampour, Alireza and Hu, Jong Wan and Mansouri, Iman and Awoyera, P. O. Optimization of the Curved Metal Damper to Improve Structural Energy Dissipation Capacity. Buildings, 12 (1).

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Structural curved metal dampers are implemented in various applications to mitigate the damages at a specific area efficiently. A stable and saturated hysteretic behavior for the in-plane direction is dependent on the shape of a curved-shaped damper. However, it has been experimentally shown that the hysteretic behavior in the conventional curved-shaped damper is unstable, mainly as a result of bi-directional deformations. Therefore, it is necessary to conduct shape optimization for curved dampers to enhance their hysteretic behavior and energy dissipation capability. In this study, the finite element (FE) model built in ABAQUS, is utilized to obtain optimal shape for the curved-shaped damper. The effectiveness of the model is checked by comparisons of the FE model and experimental results. The parameters for the optimization include the curved length and shape of the damper, and the improved approach is conducted by investigating the curved sections. In addition, the design parameters are represented by B-spline curves (to ensure enhanced system performance), regression analysis is implemented to derive optimization formulations considering energy dissipation, constitutive material model, and cumulative plastic strain. Results determine that the energy dissipation capacity of the curved steel damper could be improved by 32% using shape optimization techniques compared to the conventional dampers. Ultimately, the study proposes simple optimal shapes for further implementations in practical designs

Item Type: Article
Uncontrolled Keywords: shape optimization; curved-damper; B-spline curve; finite element; plastic strain
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment
Depositing User: AKINWUMI
Date Deposited: 30 Mar 2023 13:18
Last Modified: 30 Mar 2023 13:18

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