Cable vibrations at Dubrovnik bridge

Šavor, Zlatko; Radić, Jure; Hrelja, Gordana

doi:10.1080/15732480600855800

Cited by 30 publications

(32 citation statements)

References 4 publications

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“…The St results obtained at the mean turbulence intensity about 12% matched well with those reported in the literature within the Re range that was studied in this paper, i.e. from Re = 2.1·10 4 to 10.2·10 4 . Therefore, the adopted methodology of the St investigations was confirmed as suitable.…”

Section: Resultssupporting

confidence: 79%

“…7b). For Re < 6.6·10 4 the St values obtained for configuration No. 1 are greater than for the smooth cylinder.…”

Section: Resultsmentioning

confidence: 99%

“…In this case, the full-scale monitoring of slender bridge elements proved that ice accretion on the bridge cables has a significant influence on the flow field around the cables and their aerodynamics and can leads to a much larger amplitude of cable vibrations under wind action than without the ice [4]. It should be noticed that the literature concerning the icing influence on aerodynamics of cables of cable supported bridges is still limited, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…For the investigations of St, a new iced cable model was made at a scale of 1:1.6 using a 3D printing procedure. The St values were determined at the flow turbulence intensity of the order of 12%, within the range of the Reynolds number from 2.4·10 4 to 12.9·10 4 , based on the dominant vortex-shedding frequencies measured in the wake of the model. The correctness of the St investigations was proved based on the St test of a circular smooth cylinder with the same experimental arrangement.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Strouhal number of ice-accreted bridge cables at moderate flow turbulence

et al. 2017

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Abstract. This paper is concerned with the investigation of the Strouhal number (St) for a stationary iced cable model of cable-supported bridges using wind tunnel tests with respect to three principal angles of wind attack. The investigations were carried out in the Climatic Wind Tunnel Laboratory of the Czech Academy of Sciences in Telč. The St values were determined at the flow turbulence intensity of the order of 12%, within the range of the Reynolds number from 2.4·10 4 to 12.9·10 4 , based on the dominant vortex shedding frequencies measured in the wake of the model. The obtained experimental St values of the iced cable of a cable-supported bridge will allow to determine the critical wind velocity as well as will be helpful for prediction of the cable response due to the vortex excitation phenomenon at moderate flow turbulence condition.

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Section: Resultssupporting

confidence: 79%

“…7b). For Re < 6.6·10 4 the St values obtained for configuration No. 1 are greater than for the smooth cylinder.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of Strouhal number of ice-accreted bridge cables at moderate flow turbulence

et al. 2017

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“…The CEC approach was implemented in Sutong Yangtze River Bridge ( Figure 5), a cable-stayed bridge with a free span of 1080 m (12 MR dampers on the six longest cables and passive oil dampers on 19 additional cables). The same approach was adopted on the Franjo Tudjman Bridge in Croatia 58 , and the Alamillo Bridge in Spain 59 , where the CEC approach was used as a retrofit measure to counteract observed wind-and rain-induced vibrations. As far as the application of the second approach is concerned, 10 CVD controlled MR dampers were installed in the 5 longest cables of the Russky cablestayed bridge in Russia (world record free span of 1104 m and stay cables of up to 580 m), along with passive oil dampers in 16 additional cables.…”

Section: Controllable Fluid Dampersmentioning

confidence: 99%

Semi-Active Control Systems in Bridge Engineering: A Review of the Current State of Practice

Gkatzogias

Kappos

2016

Structural Engineering International

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This is the accepted version of the paper.This version of the publication may differ from the final published version. In view of the grave socioeconomic consequences of earthquake damage to bridge structures, along with their critical role in modern and older road and rail networks, this article attempts to identify and summarise the current trends in the use of semi-active control technology in bridge engineering, as an enhanced seismic response control solution, combining increased adaptability and reliability, compared to passive and active schemes. In this context, representative analytical and experimental studies, as well as some full-scale applications of semi-active control devices are first reviewed and a brief description of relevant benchmark studies is subsequently presented, with a view to serving as a point of reference for further research and development. A framework of performance-based control principles aiming at the aforementioned objectives is finally set forth. Permanent

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Schrägseilbedämpfung mit echtzeitgeregelten MR‐Dämpfern

Weber

Distl

2014

Beton und Stahlbetonbau

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Seile von weitgespannten Schrägseilbrücken sind wegen ihrer kleinen Dämpfung von 0,1 %-0,15 % anfällig für windinduzierte Schwingungen [1 bis 3]. Wie das Beispiel der Franjo-Tudjman-Brücke bei Dubrovnik, Kroatien, zeigt, können die Schwingamplituden bei Seillängen um die 300 m über 1 m betragen, wenn Schnee oder Eis das Profil der Seile verändert und so die Windanregung zusätzlich verstärkt [4]. Die herkömmliche Methode zur Vermeidung großer Seilschwingungen ist das Bedämpfen der Seile mit passiven Öldämpfern. Diese werden zwischen Seil und Brückendeck installiert, damit der Dämp-fer so gegenüber dem annähernd ruhenden Brückendeck Energie dissipieren kann. Der Abstand des Dämpfers zum unteren Seilankerkopf beträgt typischerweise 2 %-3 %, da so die Ästhetik der Brücke nicht negativ beeinflusst wird und weil größere Abstände wegen langer Dämpferabstützungen ökonomisch nicht sinnvoll sind. Weil die viskose Dämpferkonstante von passiven Öl-dämpfern nur auf eine Seileigenschwingung optimal abgestimmt werden kann [5,6] Verhalten der MR-Dämpferkraft

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Cable vibrations at Dubrovnik bridge

Cited by 30 publications

References 4 publications

Investigation of Strouhal number of ice-accreted bridge cables at moderate flow turbulence

Investigation of Strouhal number of ice-accreted bridge cables at moderate flow turbulence

Semi-Active Control Systems in Bridge Engineering: A Review of the Current State of Practice

Schrägseilbedämpfung mit echtzeitgeregelten MR‐Dämpfern

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