Mass ratio factor for optimum tuned mass damper strategies

Bekdaş, Gebrai̇l; Niğdeli, Sinan Melih

doi:10.1016/j.ijmecsci.2013.03.014

Cited by 111 publications

(40 citation statements)

References 33 publications

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“…Geem et al developed HS algorithm by inspiring from musical performances [7]. The detailed explanation of the optimization process employing HS for earthquake excitations is given in [4,5].…”

Section: Methodsmentioning

confidence: 99%

“…In literature, several expressions have been proposed for special conditions with assumptions [1][2][3]. Numerical search algorithms and metaheuristic methods can be used in order search the optimum TMD parameters for structures with damping and excited by random excitations [3,5,6]. In this paper, optimum TMD parameters are investigated for soil and rock sites.…”

Section: Introductionmentioning

confidence: 99%

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Optimum Tuned Mass Dampers for Structures at Rock and Soil Sites

Niğdeli

Bekdaş

2014

Proc Appl Math and Mech

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In optimum design of tuned mass dampers (TMD), several factors are effective. One of the most important factors is the characteristics of the excitation. Earthquake excitations recorded at soil and rock sites show different characteristics in period and damping. In this paper, optimum TMD properties are separately searched for seismic structures at soil sites and rock sites. For each optimization, six different earthquake records were used. A design methodology was used by employing harmony search (HS). The approach was applied to a ten story structure with one second critical period. Although more damping ratio for TMD is needed for soil sites than rock sites, TMD is more effective for rock sites than soil sites.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimum Tuned Mass Dampers for Structures at Rock and Soil Sites

Niğdeli

Bekdaş

2014

Proc Appl Math and Mech

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“…In search of optimum mass, stiffness and damping coefficient of TMDs, HS based methodology was developed for the seismic structures [16,17]. Mass ratio factor and comparison of HS with closed form TMD formulas were done by Bekdaş and Nigdeli [18]. Also, Nigdeli and Bekdaş used HS in preventing of brittle fracture of Reinforced Concrete (RC) structure by using optimum TMDs [19].…”

Section: Metaheuristic Algorithms In Tmd Optimizationmentioning

confidence: 99%

Design of Tuned Mass Dampers via Harmony Search for Different Optimization Objectives of Structures

Niğdeli

Bekdaş

2015

Computational Methods in Applied Sciences

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In this chapter, an optimization methodology for tuning of tuned mass dampers (TMDs) on seismic structures was presented for two different objectives such as reducing the displacement of first story and absolute acceleration of top story of the structure. A metaheuristic method; harmony search (HS) was employed for optimization according to the time history analyses of structure under several earthquake excitations. Harmony search inspires musical performances in order to find optimum design variables according to optimization objective.Step by step, the methodology of the optimization process is explained in the chapter. The method was applied to find an optimum TMD for a seven story shear building and the optimum results were compared for the two cases considering displacement objective and acceleration objective. According to the results, optimum TMDs for both objectives are effective on both displacements and accelerations. But for acceleration objective, a small benefit for accelerations can be seen although the optimum mass of TMD is very heavy according to displacement objective.

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“…It was shown to be very efficient in reducing the response to a narrow band of loading frequencies in such systems as well. Indeed, many works extended the optimal design problem of TMDs to MDOF systems (see, e.g., these studies [23][24][25][26][27][28][29][30][31] ). Some works, however, found that a single TMD was less efficient in reducing the responses of MDOFs to a broadband input such as earthquakes.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimal design of tuned mass dampers

Lavan

2017

Struct Control Health Monit

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This paper first presents a multi‐objective optimization problem formulation for the design of a tuned mass damper (TMD) for either a base excitation or an external load. The optimization seeks to simultaneously minimize structural responses, the TMD mass and the TMD stroke. A white noise input is adopted to represent the base acceleration or the external load. Alternatively, a filtered white noise could be used. Furthermore, the TMD is assumed to be tuned to dampen one of the modes of the structure, typically the first mode. Two approaches for the solution of the problem are then presented. The first approach directly solves the problem while considering the full multi‐degree‐of‐freedom system and the TMD equations. Using the second approach, the multimodal response of the structure is first approximately decomposed to its modal contributions. The modal contribution of the damped mode could thus be analyzed as a single‐degree‐of‐freedom system with a TMD. An intensive parametric study, where the response of a single‐degree‐of‐freedom system equipped with a TMD is optimized in a multi‐objective sense, is then performed. This parametric study enables gaining insight to the behavior of the problem. Furthermore, its results assist in executing the second optimization approach without having to actually run the optimization algorithm. The second approach is also implemented in an Excel spreadsheet that is attached as “Supporting Information.”

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Mass ratio factor for optimum tuned mass damper strategies

Cited by 111 publications

References 33 publications

Optimum Tuned Mass Dampers for Structures at Rock and Soil Sites

Optimum Tuned Mass Dampers for Structures at Rock and Soil Sites

Design of Tuned Mass Dampers via Harmony Search for Different Optimization Objectives of Structures

Multi-objective optimal design of tuned mass dampers

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