Seismic optimization analysis of high-rise buildings with a buckling-restrained brace outrigger system

Xing, Lili; Zhou, Ying; Huang, Wei

doi:10.1016/j.engstruct.2020.110959

Cited by 26 publications

(7 citation statements)

References 28 publications

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“…Some of the ORs analysis and design literature includes an optimization task, in which objective functions are always linked to important design code criteria or economic aspects. Maximum lateral displacement, inter-story drift, core base bending moment, differential axial shortening between the core and the outer columns, and OR system volume are some of the factors that have been sought to be reduced, as shown in [4]- [8].…”

Section: Bibliographical Reviewmentioning

confidence: 99%

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Multi-objective optimization of outriggers in high-rise buildings subjected to wind loads

Parfitt

Morsch

Gomes

2023

Rev. IBRACON Estrut. Mater.

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This paper aims to investigate a methodology for determining the optimum floor positioning of outriggers (ORs) and belt-trusses (BTs) over tall buildings height. The primary goal is to reduce the maximum lateral drift (MLD) and the core base moment (CBM), individually and concurrently. Furthermore, the influence of these elements on other criteria such as maximum acceleration and natural frequencies are analyzed. Throughout the work, the behavior of the structure is verified when the stiffness ratio of the main elements used in the bracing system (core, perimeter columns, OR, and BT) are varied. Therefore, a three-dimensional model of a tall building under lateral wind load is analyzed, using the finite element method with ANSYS software. The mono and multi-objective optimizations were solved, respectively, by the Nelder-Mead method with the author’s modifications to deal with integer variables and by a utility function. Based on the results, it is concluded that by specifically adding ORs/ORs-BTs in tall buildings the influence on the reduction of the mentioned objectives is extremely relevant, reaching up to 68% for the CBM and 71% for the MLD, depending on the amounts employed.

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Section: Bibliographical Reviewmentioning

confidence: 99%

“…Xing et al [8] conducted a study based on a seismic spectral analysis of a simplified model using buckling restrained braces (BRBs) OR system which is considered a damped OR. The authors themselves proposed and validated the model using the ANSYS program.…”

Section: Bibliographical Reviewmentioning

confidence: 99%

Multi-objective optimization of outriggers in high-rise buildings subjected to wind loads

Parfitt

Morsch

Gomes

2023

Rev. IBRACON Estrut. Mater.

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“…They determined the optimal damped outrigger location and top displacement spectra using newly proposed fitted equations. [ 26 ] Rezazadeh et al presented an optimum design method for BRB frames subjected to earthquakes using multi‐objective charged system. In their study, Minimum structural weight and minimum seismic energy are selected as two objective functions to find a Pareto front solution.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of 3D special steel buckling‐restrained braced structures

Kaveh

Moghanni

Javadi

2021

Structural Design Tall Build

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Summary In the current study, the optimal design of 3D frames equipped with buckling restrained braces is presented. The objective function in the optimization problem is considered as weight minimization subjected to serviceability and strength requirements. Three different metaheuristic algorithms including Particle Swarm Optimization (PSO) algorithm, Teaching Learning Based Optimization (TLBO) algorithm, and Discrete Firefly Algorithm (DFA) are utalized to solve the optimization problem. Response spectrum analysis is considered to examine the performance of the structures during the optimization process under applied loads. Two real‐size steel structures with buckling restrained braces are selected to perform optimal design. The results demonstrate that the TLBO algorithm has better performance in discrete structural optimization.

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“…They can adjust the magnitude of the control force. A large number of theoretical and experimental studies have been done [15][16][17][18][19]. The results reveal that among the different types of control devices, MR dampers are a promising type.…”

Section: Introductionmentioning

confidence: 99%

Vibration reduction on a cantilever Timoshenko beam control subjected to combined effects of wind and earthquake loads using damped outriggers

Metsebo

Ndemanou

Chamgoué

et al. 2021

International Advanced Researches and Engineering Journal

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This paper deals with the combined effects of wind and earthquake on the dynamic response of a cantilever structure. It is mainly composed of the core-structure, multi-outriggers with magneto-rheological (MR) dampers localized at different levels along of the structure and perimeter columns. These control devices are semi-active in nature and exhibit a nonlinear behaviour. One of their interesting characteristics is their ability to add supplementary energy dissipation to the structural system. Exposed to combined wind and earthquake loads, the core-structure is modelled using a Timoshenko cantilever beam. The stochastic approach based on the statistic properties is employed to estimate the degree excitations of the two natural hazards. The peak Root-Mean-Square (RMS) are evaluated to quantify the optimal location of damped outriggers. Defined as the control algorithm based on human reasoning, the Fuzzy logic is used to select the appropriate current that feeds the control devices. The obtained results indicate that the application of the fuzzy logic further minimizes the effects of bending-moment and shear force. All of these enhance the performance of the whole structural response and lead to a significantly reduction of excessive vibration to an acceptable level.

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Seismic optimization analysis of high-rise buildings with a buckling-restrained brace outrigger system

Cited by 26 publications

References 28 publications

Multi-objective optimization of outriggers in high-rise buildings subjected to wind loads

Multi-objective optimization of outriggers in high-rise buildings subjected to wind loads

Optimal design of 3D special steel buckling‐restrained braced structures

Vibration reduction on a cantilever Timoshenko beam control subjected to combined effects of wind and earthquake loads using damped outriggers

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