Design of Irregular Frames with Fluid Viscous Dampers Using Optimization

Ohad Idels, Oren Lavan

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


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.

Original languageEnglish
Title of host publicationGeotechnical, Geological and Earthquake Engineering
Number of pages10
StatePublished - 2022

Publication series

NameGeotechnical, Geological and Earthquake Engineering
ISSN (Print)1573-6059
ISSN (Electronic)1872-4671

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology


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