Global Simultaneous Optimization of Oil, Hysteretic and Inertial Dampers Using Real-Valued Genetic Algorithm and Local Search

Uemura, Ryohei; Akehashi, Hiroki; Fujita, Kohei; Takewaki, Izuru

doi:10.3389/fbuil.2021.795577

Cited by 6 publications

(4 citation statements)

References 35 publications

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“…The design and arrangement of inter-storey dampers were studied including the optimization of the values, numbers, and position of the dampers (Singh and Moreschi, 2001;Fujita et al, 2010;Uemura et al, 2021;Akehashi and Takewaki, 2022a). The design optimization problem can be formulated as (De Domenico et al, 2019) min cj J c j subject to g c j ≤ g where J(c j ) is the objective function depends on damping coefficients c j , j ∈ Z + and g(c j ) is a constraint.…”

Section: Super-structure Isolation Systemsmentioning

confidence: 99%

Analysis and design of non-linear seismic isolation systems for building structures—An overview

Zhu

Lang²,

Fujita³

et al. 2023

Front. Built Environ.

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In this paper, the development of non-linear building isolation systems is overviewed. The study summarizes commonly used linear building isolation systems in two categories, which are building base isolation systems and building inter-storey isolation systems. Typical isolators including Lead-Rubber Bearings Friction Pendulum Bearings inter-storey viscous damper and Tuned Mass Damper are reviewed. The analysis and design of linear building isolation systems are also reported. After that, non-linear building isolation systems are introduced from two aspects based on their dynamic characteristics. They are (i) non-linear stiffness isolators including Quasi-Zero Stiffness isolators and Non-linear Energy Sink and (ii) non-linear damping isolators including power-law viscous dampers and magnetorheological dampers. Practical implementations of these non-linear isolators are introduced. Finally, the analysis and design of non-linear building isolation systems are discussed. Traditional equivalent linearization approaches and advanced non-linear frequency design approaches are introduced. The promising applications of the non-linear frequency design approaches to building isolation systems are also demonstrated in this review paper.

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Section: Super-structure Isolation Systemsmentioning

confidence: 99%

Analysis and design of non-linear seismic isolation systems for building structures—An overview

Zhu

Lang²,

Fujita³

et al. 2023

Front. Built Environ.

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“…Several methods have been proposed in the literature to identify the optimal properties of different types of passive dampers (Uemura et al, 2021). One of the most popular methods is the genetic algorithm (GA), which is based on the concepts of natural selection and natural genetics (Holland, 1975).…”

Section: Description Of the Nonlinear Viscous Dampers And Structures ...mentioning

confidence: 99%

Comparative study of the damage cost of reinforced concrete buildings with and without nonlinear viscous dampers subjected to seismic loading

Flores-Mendoza

Pozos‐Estrada

Gómez

2022

Front. Built Environ.

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In an optimal seismic design context, the seismic demand is characterized by hazard curves that can be obtained by simulation techniques, and the capacity of the structure is established by the designer following a predefined seismic code. The capacity of structures is generally characterized by the seismic design coefficient. Furthermore, the structure damage is evaluated based on certain well-defined damage indicators (e.g., displacement ductility). Thus based on the damage indicator, it is possible to estimate the cost of the associated losses. Furthermore, it is noted that the quantification of the damage costs associated with reinforced concrete (RC) structures with and without nonlinear viscous dampers under seismic loading is very scarce in the relevant literature. In this study, damage cost expressions, similar to those employed in the optimal seismic design criterion, were used to quantify and compare the damage cost on RC buildings with and without viscous dampers located in seismic-prone areas of Mexico. For the analysis, three RC buildings were designed according to Mexican seismic design regulations. The buildings under study were subjected to seismic actions characterized by actual seismic records, scaled according to simulated maximum ground motion accelerations. The damage to the structures caused by seismic action is calculated by means of a damage factor that is a function of displacement ductility demand. The cost of damage to the considered structures was estimated based on cost expressions that are a function of the damage factor. The analyses results indicate that the use of viscous dampers in concrete buildings subjected to seismic action can considerably reduce the associated damage costs with respect to buildings without such a damping system.

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“…Akehashi et al 15 proposed an optimal design method for a structure equipped with hysteretic dampers by using a real‐coded genetic algorithm and local search. Uenura et al 16 carried out global simultaneous optimization for structures equipped with oil, hysteretic, and inertial dampers using a real‐value genetic algorithm and local search method. Jiang et al 17 employed nondominated sorting genetic algorithm version II (NSGA‐II) to optimize a structure with magnetorheological dampers, in which the parameters of the MR dampers are determined in the Pareto optimal solution set based on the principle of minimum mass.…”

Section: Introductionmentioning

confidence: 99%

Efficient optimal seismic design method of passive energy dissipation systems based on the inelasticity‐separated finite element method

Luo

et al. 2023

Earthquake Engineering and Resilience

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Installing passive energy dissipation dampers in the main structure is an effective way to reduce structural seismic response. The traditional optimal design of passive energy dissipation systems requires a massive nonlinear time history analysis, which is an extremely inefficient process and, as a result, limits its application in practice. In this paper, an efficient optimal design method for dampers is proposed based on the inelasticity‐separated finite element method (IS‐FEM) and genetic algorithm. The IS‐FEM is a novel efficient structural nonlinear analysis method that can avoid the real‐time updating and decomposition of the structural global stiffness matrix in a traditional structure analysis and only requires a small‐scale Schur complementary matrix representing local nonlinear behavior being decomposed per iteration. To make the IS‐FEM available for the analysis of structures equipped with an energy dissipation system, the inelasticity‐separated governing equations of displacement‐based dampers are derived first. Then, an improved constrained optimal genetic algorithm based on population feasibility is presented to enhance the searching ability near the feasible domain boundary. Finally, an efficient damper optimization design method is proposed by combining the developed genetic algorithm with the proposed IS‐FEM‐based analysis procedure for passive energy dissipation structures. The accuracy and efficiency of the proposed method are verified by designing a set of metallic yield dampers to retrofit a steel structure.

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Global Simultaneous Optimization of Oil, Hysteretic and Inertial Dampers Using Real-Valued Genetic Algorithm and Local Search

Cited by 6 publications

References 35 publications

Analysis and design of non-linear seismic isolation systems for building structures—An overview

Analysis and design of non-linear seismic isolation systems for building structures—An overview

Comparative study of the damage cost of reinforced concrete buildings with and without nonlinear viscous dampers subjected to seismic loading

Efficient optimal seismic design method of passive energy dissipation systems based on the inelasticity‐separated finite element method

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