Damping of Cables by a Transverse Force

Krenk, Steen; Høgsberg, Jan Becker

doi:10.1061/(asce)0733-9399(2005)131:4(340)

Cited by 123 publications

(98 citation statements)

References 15 publications

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“…The relative motion between the cables and between cable and girder generate damping force. 99,100,133 This method, however, has a limited performance and adequate damping force cannot be provided for extremely long stay cables. The damper has customarily been designed by neglecting several influencing factors, one of which is the cable flexural rigidity.…”

Section: Control Of Cable Vibrationmentioning

confidence: 99%

“…The damper has customarily been designed by neglecting several influencing factors, one of which is the cable flexural rigidity. 133,134 It can be anticipated that the small flexural rigidity possessed by real cable systems affects performance of the damper as it is usually installed near the anchorage. As a result, additional damping given to the cable may not be as high as designed.…”

Section: Control Of Cable Vibrationmentioning

confidence: 99%

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Vibration Mechanisms and Controls of Long-Span Bridges: A Review

Fujino

Siringoringo

2013

Structural Engineering International

134

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Dynamic performance is an important consideration in long-span bridge design. Owing to its flexibility an d low damping, various types of vibration from different sources of excitation could occur during the lifetime of a long-span bridg e. This paper reviews important studies and developments on long-span bridge vibration mechanism an d control under wind, seismic,traffic and human-motion excit ations. Types of vibration commonly observed on the long-span bridge are discussed from the viewpoint of structure engineering. Discussion for each subject is commenced by describing the vibration mechanism followed by the survey on observed phenomena in many long-spa n bridges associated with the type of vibration. The paper also describes the engineering solutions adopted as countermeasures for each type of bridge vibration problem.

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Section: Control Of Cable Vibrationmentioning

confidence: 99%

Section: Control Of Cable Vibrationmentioning

confidence: 99%

Vibration Mechanisms and Controls of Long-Span Bridges: A Review

Fujino

Siringoringo

2013

Structural Engineering International

134

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“…An analytical formula has been derived to estimate the optimal damper design for a given cable configuration and attachment location (Krenk, 2000). The individual and combined effects of realistic parameters such as cable sag (Krenk and Nielsen, 2002), damper stiffness (Krenk and Høgsberg, 2005), cable flexural rigidity (Hoang and Fujino, 2007) and damper support stiffness (Zhou and Sun, 2005) have also been explicitly taken into consideration in the design formulas of the linear damper. Recently, a semi-active damper has been studied theoretically as an alternative to a transverse passive viscous damper for reducing cable motion, and it may be a potential method to dramatically reduce the cable motion (Johnson et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Influence of cable dampers on cable-stayed bridges

Liang¹,

Kong²,

Li³

2014

Proceedings of the Institution of Civil Engineers - Bridge Engi

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2 3Cable-stayed bridges have seen a wider application in recent years, with many having longer and longer spans. Modern cable-stayed bridges use numerous cables to support the stiffening girders. Many cable dampers are installed to mitigate cable vibration. This paper focuses on the effect of a cable damper on the dynamic characteristics of the whole cable-stayed bridge, especially modal damping. A practical model comprising the cable, girder and damper is developed to analyse the relationship between system modal damping and the performance of a cable damper with the complex mode method. A test model with cable, girder and damper was made to verify the theoretical results. A finite-element model of a simplified cable-stayed bridge based on a test model is adopted to assess the effects of cable dampers on the anti-seismic performance and wind-resistant behaviour of the cablestayed bridge. The results show that the cable dampers of a cable-stayed bridge can increase the modal damping of the whole bridge.

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“…Krenk (2004) investigated the complex eigenproblem of cables or beams with a viscous damper at the boundary or at an intermediate position. Krenk and Hogsberg (2005) further investigated the modal response of a cable with transverse dampers modelled with viscous, viscoelastic, fractionally viscous or nonlinearly viscous properties. The damping models in the work of Krenk and his co-workers were non-proportional, and they demonstrated that the eigenvalues corresponding to vibration modes were located on a circular arc in the complex plane.…”

Section: Introductionmentioning

confidence: 99%

A Galerkin method for distributed systems with non-local damping

Lei

Friswell

Adhikari

2006

International Journal of Solids and Structures

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In this paper, a non-local damping model including time and spatial hysteresis effects is used for the dynamic analysis of structures consisting of Euler-Bernoulli beams and Kirchoff plates. Unlike ordinary local damping models, the damping force in a non-local model is obtained as a weighted average of the velocity field over the spatial domain, determined by a kernel function based on distance measures. The resulting equation of motion for the beam or plate structures is an integro-partial-differential equation, rather than the partial-differential equation obtained for a local damping model. Approximate solutions for the complex eigenvalues and modes with non-local damping are obtained using the Galerkin method. Numerical examples demonstrate the efficiency of the proposed method for beam and plate structures with simple boundary conditions, for non-local and non-viscous damping models, and different kernel functions.

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Damping of Cables by a Transverse Force

Cited by 123 publications

References 15 publications

Vibration Mechanisms and Controls of Long-Span Bridges: A Review

Vibration Mechanisms and Controls of Long-Span Bridges: A Review

Influence of cable dampers on cable-stayed bridges

A Galerkin method for distributed systems with non-local damping

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