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Author(s):	Weber, Felix; Distl, Hans
Title:
Abstract:	Schrägseile neigen wegen ihrer kleinen Dämpfung von 0,1%-0,15% zu windinduzierten Schwingungen. Da sich Windbedingungen ändern, sind sowohl Schwingamplitude als auch Schwingfrequenz unbekannt. Daher muss ein Seildämpfungssystem die Seile unabhängig von deren Amplitude und Frequenz gleich effizient bedämpfen. Dieser Aufsatz zeigt, wie diese Anforderung mittels echtzeitgeregelter magnetorheologischer Dämpfer erfüllt werden kann. Die Effizienz des adaptiven Seildämpfungssystems ist experimentell validiert und dessen Umsetzung auf den weltgrößten Schrägseilbrücken, der Sutong-Brücke in China und der Russky-Brücke in Russland, beschrieben. Stay Cable Damping by Real-Time Controlled MR Dampers Stay cables are prone to wind-induced vibrations due to their low inherent damping of 0,1%-0,15%. Since wind conditions vary over time, vibration amplitudes and frequencies are unknown. Consequently, cable damping systems must generate amplitude and frequency independent cable damping. It is described how this requirement can be fulfilled by real-time controlled magnetorheological dampers. The efficiency of the adaptive cable damping system is experimentally validated and its implementation on the world largest stay cable bridges, the Sutong Bridge in China and the Russky Bridge in Russia, is described.
Source:	Beton- und Stahlbetonbau 109 (2014), No. 4
Page/s:	239-247
Language of Publication:	German

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