A Method of Estimating the Parameters of Tuned Mass Dampers for Seismic Applications

Sadek, Fahim; Mohraz, Bijan; Taylor, Andrew; Chung, Riley M.

doi:10.1002/(sici)1096-9845(199706)26:6<617::aid-eqe664>3.0.co;2-z

Cited by 549 publications

(395 citation statements)

References 6 publications

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“…where Φ is the amplitude of the first mode of vibration for a unit modal participation factor computed at the location of the TMD [2]. The equation for the tuning ratio is thus obtained from the equation for the 2-DOF system by replacing µ by µΦ.…”

Section: Parametric Control Of Tmdmentioning

confidence: 99%

“…It should be noted that the factor Φ used in Section 2.2 to define an equivalent MDOF optimal TMD stiffness and damping may be less applicable [2] when larger mass ratios are used, as is the case here. Certainly, given Figure 5, the mode shapes are significantly disturbed from the original No TMD case.…”

Section: Modal Analysismentioning

confidence: 99%

“…Certainly, given Figure 5, the mode shapes are significantly disturbed from the original No TMD case. However, the validity of the analysis from [2] should hold for two main reasons. First, the mode shapes in Figure 5 are similar up to the break in structural sections, above which the effectively rigid TMD section behaves differently, thus the relative motions up to that point will hold.…”

Section: Modal Analysismentioning

confidence: 99%

“…Tuned mass damper (TMD) systems are often considered as a practical seismic response control solution for flexible structures, such as tall buildings [1][2][3]. The main disadvantage of a TMD system is the sensitivity related to the narrow band control and the fluctuation in tuning the TMD frequency to the controlled frequency of a potentially degrading structure.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Semi‐active tuned mass damper building systems: Application

Chey

Chase

Mander

et al. 2009

Earthq Engng Struct Dyn

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SUMMARYSeismic performance attributes of multi-story passive and semi-active tuned mass damper (PTMD and SATMD) building systems are investigated for 12-story moment resisting frames modeled as '10+2' stories and '8+4' stories. Segmented upper portion of the stories are isolated as a tuned mass, and a passive viscous damper or semi-active resetable device is adopted as energy dissipation strategy. The semi-active approach uses feedback control to alter or manipulate the reaction forces, effectively re-tuning the system depending on the structural response. Optimum TMD control parameters and appropriate matching SATMD configurations are adopted from a companion study on a simplified two-degree-of-freedom (2-DOF) system. Statistical performance metrics are presented for 30 probabilistically scaled earthquake records from the SAC project. Time history analyses are used to compute response reduction factors across a wide range of seismic hazard intensities. Results show that large SATMD systems can effectively manage seismic response for multi-degree-of freedom (MDOF) systems across a broad range of ground motions in comparison to passive solutions. Specific results include the identification of differences in the mechanisms by which SATMD and PTMD systems remove energy, based on the differences in the devices used. Additionally, variability is seen to be tighter for the SATMD systems across the suites of ground motions used, indicating a more robust control system. While the overall efficacy of the concept is shown the major issues, such as isolation layer displacement, are discussed in details not available in simplified spectral analyses, providing further insight into the dynamics of these issues for these systems.

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Section: Parametric Control Of Tmdmentioning

confidence: 99%

Section: Modal Analysismentioning

confidence: 99%

Section: Modal Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Semi‐active tuned mass damper building systems: Application

Chey

Chase

Mander

et al. 2009

Earthq Engng Struct Dyn

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“…In most of the above studies, the main structure is generally represented by an equivalent single degree of freedom system. Similarly the performance of a TMD applied to a multi degree of freedom (MDOF) structure and optimized to control only a single mode of vibration (usually the fundamental one) has been investigated by various authors [24][25]. The optimal parameters of single and multiple TMDs for the control of MDOF structures have been studied by several researchers in the last decades [23,[26][27] also considering the uncertainties affecting structural parameters [28][29].…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of Tuned Mass Dampers by Performance–cost Analysis

Greco¹,

Marano²,

Fiore³

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Single- and multiple-tuned liquid column dampers for seismic applications

Sadek

Mohraz

Lew

1998

Earthquake Engng. Struct. Dyn.

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SUMMARYDesign parameters for single-and multiple-tuned liquid column dampers for reducing the response of structures to seismic excitations are presented. A deterministic analysis is carried out using 72 earthquake ground motion records to determine the tuning ratio, tube width to liquid length ratio, and head loss coefficient corresponding to a given mass ratio for single-tuned liquid column dampers. A similar analysis is performed to determine the central tuning ratio, tuning bandwidth, and grouping of dampers for multiple-tuned liquid column dampers. The study indicates that by properly selecting the design parameters, single-and multiple-tuned liquid column dampers can reduce the response of structures to seismic excitation by up to 45 per cent. Design examples using single-and multiple-tuned liquid column dampers in a bridge and a ten-storey building are presented to illustrate how the parameters are selected and to demonstrate the performance of the devices under different ground excitations. The response of several structures with tuned liquid column dampers is compared with that using tuned mass dampers where it is shown that both devices result in comparable reductions in the response.

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A Method of Estimating the Parameters of Tuned Mass Dampers for Seismic Applications

Cited by 549 publications

References 6 publications

Semi‐active tuned mass damper building systems: Application

Semi‐active tuned mass damper building systems: Application

Optimal Design of Tuned Mass Dampers by Performance–cost Analysis

Single- and multiple-tuned liquid column dampers for seismic applications

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