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Article Dans Une Revue Engineering Structures Année : 2013

Use Shape Memory Alloys damper device to mitigate vibration amplitudes of bridge cables

Lamine Dieng
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Guillaume Helbert
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Shabnam Arbab-Chirani
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Most of civil engineering cable structures are subjected to potential damages mainly due to dynamic oscillations induced by wind, rain or traffic. If vibration amplitudes of bridge cables are too high, it may cause fatigue damages. Recently, research had been conducted dealing with the use of damping devices in order to reduce vibration amplitudes of cables. In this paper, thin Ni-Ti (Nickel-Titanium) Shape Memory Alloy (SMA) wires were used as damping devices. The aim of this work is to qualitatively and quantitatively assess the efficiency of Ni-Ti dampers to reduce the vibration amplitudes of civil engineering cables. For a practical control of the SMA in damping for stayed cables, several measurements were carried out in this work, on a realistic full scale cable sample in Ifsttar (Nantes - France) laboratory facility. The experimental observations were done inducing quite high oscillations in the middle of the cable without any damper device or with a SMA damper device made by two thin NiTi parallel wires. The intrinsic damping coefficient in the free cable was extremely low. The reduction of cable oscillation amplitudes was about 25% in 1 min. The effects of the damper are investigated in this study, outlining the drastic reduction of the oscillation amplitudes all along the cable in less than 10 s. Other tests were performed placing the source of oscillations or the damper at different positions along the cable and the results are observed and compared. Finite element simulations have been carried out using Marc/Mentat finite element code with good agreement between experiment and simulation. The finite element tools enable to study quantitatively the effectiveness of the damper at several points of the cable.
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Dates et versions

hal-00857222 , version 1 (03-09-2013)



Lamine Dieng, Guillaume Helbert, Shabnam Arbab-Chirani, Thibaut Lecompte, Philippe Pilvin. Use Shape Memory Alloys damper device to mitigate vibration amplitudes of bridge cables. Engineering Structures, 2013, 56, pp.1547-1556. ⟨10.1016/j.engstruct.2013.07.018⟩. ⟨hal-00857222⟩
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