Amplitude and frequency independent cable damping of Sutong Bridge and Russky Bridge by magnetorheological dampers

Weber, Felix; Distl, Hans

doi:10.1002/stc.1671

Cited by 81 publications

(71 citation statements)

References 41 publications

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“…40 MR dampers), to supress possible cable vibration 56 . Furthermore, two control approaches 57 (i.e. cycle energy control (CEC) and controlled viscous damping (CVD)) for MR dampers on cables were implemented in a number of bridges either as part of their design or as a retrofit strategy.…”

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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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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“…On the other hand, the dimensions of a damper would restrict it to be installed very close to the cable anchorage, which limits its efficiency. To overcome these difficulties, several semi‐active and active control schemes have been developed to enhance the delivered supplemental damping . However, the power demand and stability issues of active controls, as well as the real‐time measurements and computational cost associated with semi‐active control, have led to the evolution of more effective passive devices, in particular, the negative stiffness damper (NSD).…”

Section: Introductionmentioning

confidence: 99%

Multimode vibration control of stay cables using optimized negative stiffness damper

Javanbakht

Cheng

Ghrib

2020

Struct Control Health Monit

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Summary Due to their low inherent damping and high lateral flexibility, stay cables are prone to large amplitude vibrations governed by either a single or multiple cable modes. Among the practical measures, the installation of transverse passive dampers near the cable‐deck anchorage is a popular choice. Compared to conventional positive stiffness and zero stiffness dampers, negative stiffness damper (NSD) manifests superior performance in mitigating cable vibrations, especially in the case of long cables. In this study, a novel design approach is proposed to optimize NSD for multimode cable vibration control. Two design scenarios are considered. In the former, the damper size is optimized for a predetermined negative damper stiffness; whereas in the latter, the size and negative stiffness of the NSD are both optimized to achieve a required damping ratio for the dominant modes. The applicability of the proposed NSD optimum design approach is validated using 15 sample real stay cables. A numerical example is presented, of which a NSD is designed based on the proposed approach to optimize wind‐induced multimode vibration control of a 460‐m stay cable, and the performance is compared with that of a linear‐quadratic regulator (LQR) control. Results show that the selected NSD can effectively suppress the dominant modes and has a controlling effect comparable with an active control using LQR. In addition, it is found that when there exist more than two dominant modes in vibration, designing NSD for the lowest and the highest dominant modes would also adequately control the mid‐range modes.

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“…Compared with electrorheological fluid, magnetorheological fluid (MRF), and shape memory alloy, shear thickening fluid (STF) is another smart material with excellent performance given that the characteristics of STF depend on its shear strain rate. Under high strain rate loading, the apparent viscosity of the contact interface changes dramatically, even from liquid phase to solid phase .…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on hysteretic behavior of a shear thickening fluid damper

Wei

Lin

Liu

2019

Struct Control Health Monit

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Summary In this study, a shear thickening fluid (STF) damper was experimented upon under different loading frequencies and amplitudes to investigate its nonlinear hysteretic behavior and energy dissipation capacity. An STF sample with 20% mass fraction and dispersion medium were prepared by nanoparticle silica (SiO2) and polyethylene glycol (PEG200). By using a parallel‐plate rheometer, steady‐state experiments were carried out to characterize the rheological properties of the sample. The results indicate that the STF sample shows an abrupt increase in viscosity/stress beyond a critical shear rate/strain. The results also show that the STF sample has good reversibility, thixotropy, and stability and can be used as a smart damping material in damper devices. Also, a prototype damper was developed and manufactured. Its nonlinear hysteretic behavior and energy dissipation capacity were experimentally investigated through the responses of damping force–displacement and damping force–velocity. The results show that the STF damper has excellent damping force as the loading condition increases and the controllability can be increased up to 3.21 times. The results also show that the energy dissipation capacity formed by damping force–displacement becomes fuller as the loading condition increases. Moreover, the results show that the graphical shapes of hysteretic loops of damping force–velocity can exhibit various styles as the STF's mechanism changes but the shapes are not stable when the velocity exceeds a certain value.

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Amplitude and frequency independent cable damping of Sutong Bridge and Russky Bridge by magnetorheological dampers

Cited by 81 publications

References 41 publications

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

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

Multimode vibration control of stay cables using optimized negative stiffness damper

Experimental investigation on hysteretic behavior of a shear thickening fluid damper

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