Design of Mechanical Viscous Dampers for Stay Cables

Tabatabai, Habib; Mehrabi, Armin

doi:10.1061/(asce)1084-0702(2000)5:2(114)

Cited by 118 publications

(60 citation statements)

References 5 publications

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“…The damping parameters are assumed to be 0.0128 α = and 4 1.56 10 β − = × in numerical calculations. This assumption produces damping ratios of the first two modes being equal to 0.15%.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…[3][4][5]. Also, it can be seen that when the cable sag is neglected, the difference between the linear and non-linear cable response is fairly small.…”

Section: Linear and Non-linear Response Of The Cablementioning

confidence: 95%

“…For his solution, he assumed a cable with no bending rigidity and also neglected the effect of cable sag extensibility. Mehrabi and Tabatabai [4] considered the effect of sag extensibility and bending rigidity in the cable behavior. Their solution was also based on finite series method.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Potential of viscous dampers for vibration mitigation of transmission overhead lines

Bassam¹,

Soltani²

2015

SPIE Proceedings

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One of the important parameters in the design of transmission lines is the evaluation of the susceptibility of these cables to vibrations and if necessary, providing proper means to mitigate these vibrations. Transmission lines are especially susceptible to vibrations as a result of their light weight. Viscous dampers are one of the tools that can be applied to mitigate cable vibrations. However, the damping ratio obtained by these dampers is very limited. The present study provides a finite element formulation for an isoparametric cable element. A comparison is made between the results of presented approach with finite series method to validate the model. Additionally, a comparison is made between linear and non-linear behavior of a cable under sweep sinusoidal excitations with different amplitudes. Finally, a case study is conducted to investigate the potential of additional damping provided by a third viscous damper for the case in which two rubber bushings are already attached to the cable near the anchorages. Based on this case study, the dependency between the third damper location and optimum viscosity for maximum vibration mitigation that can be given to a cable with rubber bushings is investigated. The results of the present study show that although rubber bushings may help mitigating vibrations, they reduce the effect of additional damping devices. Additionally, for non-sagged cables, the nonlinearity is negligible in moderate vibrations. Lastly, if the third damper viscosity is selected properly, it can be very effective in further mitigating the vibrations amplitudes.

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Section: Numerical Resultsmentioning

confidence: 99%

“…[3][4][5]. Also, it can be seen that when the cable sag is neglected, the difference between the linear and non-linear cable response is fairly small.…”

Section: Linear and Non-linear Response Of The Cablementioning

confidence: 95%

See 1 more Smart Citation

Potential of viscous dampers for vibration mitigation of transmission overhead lines

Bassam¹,

Soltani²

2015

SPIE Proceedings

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show abstract

“…This example has been used by Tabatabai and Mehrabi [21]. Assume that a cable with the properties listed in Table 6 is in need of a TMD-MR damper to suppress wind-rain induced vibrations.…”

Section: Example For a Tmd-mr Damper Designmentioning

confidence: 99%

Theoretical exploration of a taut cable and a TMD system

Cai

2007

Engineering Structures

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“…Excessive vibration of stay cables will cause reduced cable and connection life due to fatigue and=or breakdown of corrosion protection. Therefore, the vibration characteristics of stay cables and supplementary damping measures have received considerable interest from many researchers (e.g., Chen et al 2001;Johnson et al 2003;Krenk 2000;Lou et al 2001;Jones 2001, 2002a, b;Pacheco et al 1993;Tabatabai and Mehrabi 2000;Xu et al 1999;Yamaguchi and Fujino 1998). Retrofit hydraulic dampers have been installed on the Fred Hartman Bridge and Veterans Memorial Bridge (both located in Texas, USA) to control the vibrations of the stay cables (Jones 2003).…”

Section: Technologies For Long-span Cable-supported Bridges 321mentioning

confidence: 99%

The Concept and Development of Smart Structures Technologies for Long-span Cable-supported Bridges

Zhang

2003

Marine Georesources & Geotechnology

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Design of Mechanical Viscous Dampers for Stay Cables

Cited by 118 publications

References 5 publications

Potential of viscous dampers for vibration mitigation of transmission overhead lines

Potential of viscous dampers for vibration mitigation of transmission overhead lines

Theoretical exploration of a taut cable and a TMD system

The Concept and Development of Smart Structures Technologies for Long-span Cable-supported Bridges

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