Abstract
This work presents a methodology for the optimal design of frame structures with elevation irregularity equipped with fluid viscous dampers. Irregular structures became more prevalent in the past few decades due to architectural and functionality considerations. However, from an engineering point of view, they are more challenging to design. Irregular structures are characterized by a drastic change in strength, stiffness and/or mass. Therefore, significant inter-story drifts and plastic deformation are expected in the relevant stories. One of the common design strategies to control the structural response is to integrate energy dissipation devices. In this paper, an approach for the simultaneous design of the force-resisting system and the energy dissipation devices is presented. A mixed-integer optimization problem aims to minimize the cost is formulated. Nonlinear Response History Analysis (NRHA) is adopted to assess the dynamic response of the frame, accounting for both the nonlinear behavior of the structure and the dampers. The optimization process is carried out using an evolutionary optimization approach, the well-known Genetic Algorithm (GA). A numerical example shows the robustness of the proposed optimization strategy.
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Acknowledgements
This research was supported by the Israeli Ministry of Housing and Construction through the National Building Research Institute grant # 2028281. The authors are grateful for this support.
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Idels, O., Lavan, O. (2022). Design of Irregular Frames with Fluid Viscous Dampers Using Optimization. In: Bento, R., De Stefano, M., Köber, D., Zembaty, Z. (eds) Seismic Behaviour and Design of Irregular and Complex Civil Structures IV. Geotechnical, Geological and Earthquake Engineering, vol 50. Springer, Cham. https://doi.org/10.1007/978-3-030-83221-6_11
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