Estimation Curve for Modal Damping in Stay Cables with Viscous Damper

Pacheco, Benito M.; Fujino, Yozo; Sulekh, Ajai

doi:10.1061/(asce)0733-9445(1993)119:6(1961)

Cited by 299 publications

(192 citation statements)

References 1 publication

Supporting

Mentioning

170

Contrasting

Unclassified

Order By: Relevance

“…In some cases local fatigue cracks are formed and further destruction of the structure is performed. Methods of reduction vibrations are applied to avoid such situations as cables have a very low level of damping an low bending stiffness [3]. Connection of cables to each other is another possible solution but this solution is used very rarely because of the adverse visual impact.…”

Section: Bridge Cable Vibrationsmentioning

confidence: 99%

The effectiveness of vibration damper attached to the cable due to wind action

Gołębiowska

Dutkiewicz

2017

EPJ Web Conf.

View full text Add to dashboard Cite

Abstract. In the paper the analysis of vibration of cable with attached damper is performed. Source of vibrations comes from the wind. The level of reduction of vibrations is also analysed. Damper attached to the cable is characterized by mass, stiffness and damping ratio. The paper also presents the equations of motion for the cable with damper, taking into account the initial parameters: cable cross-section and the location of the damper. The analysis is performed in time domain. It is discussed that in real situations the different types of cable vibration due to their amplitudes and frequencies is met: short-term oscillations of high amplitude, caused by a single impulse force, called bouncing cable, low amplitude and low wave length and the high frequency, called aeolian vibration, large oscillation amplitude, long wave length and low frequency, called galloping or dancing cables.

show abstract

Section: Bridge Cable Vibrationsmentioning

confidence: 99%

The effectiveness of vibration damper attached to the cable due to wind action

Gołębiowska

Dutkiewicz

2017

EPJ Web Conf.

View full text Add to dashboard Cite

show abstract

“…Some of these bridges are located in high seismic zones according to the current seismic hazard map of China. From the structural dynamics point of view, cable-stayed bridges exhibit flexible and low damping behavior in which the vertical, lateral, and torsional motions are strongly coupled that raises many concerns about their behavior under environmental dynamic loads such as wind and earthquakes [2]. If a cable-stayed bridge collapses in an earthquake, it can cause tremendous loss of life and property.…”

Section: Introductionmentioning

confidence: 99%

Seismic Fragility Assessment of an Isolated Multipylon Cable-Stayed Bridge Using Shaking Table Tests

Pang

2017

Advances in Civil Engineering

View full text Add to dashboard Cite

In recent decades, cable-stayed bridges have been widely built around the world due to the appealing aesthetics and efficient and fast mode of construction. Numerous studies have concluded that the cable-stayed bridges are sensitive to earthquakes because they possess low damping characteristics and high flexibility. Moreover, cable-stayed bridges need to warrant operability especially in the moderate-to-severe earthquakes. The provisions implemented in the seismic codes allow obtaining adequate seismic performance for the cable-stayed bridge components; nevertheless, they do not provide definite yet reliable rules to protect the bridge. To date, very few experimental tests have been carried out on the seismic fragility analysis of cable-stayed bridges which is the basis of performance-based analyses. The present paper is aimed at proposing a method to derive the seismic fragility curves of multipylon cable-stayed bridge through shake table tests. Toward this aim, a 1/20 scale three-dimensional model of a 22.5 m cable-stayed bridge in China is constructed and tested dynamically by using the shaking table facility of Tongji University. The cable-stayed bridge contains three pylons and one side pier. The outcomes of the comprehensive shaking table tests carried out on cable-stayed bridge have been utilized to derive fragility curves based on a systemic approach.

show abstract

“…Passive viscous dampers are widely used by optimally tuning their damper coefficients to achieve maximum damping at only one targeted mode of cable vibration and properly selecting the damper installation location [7][8][9][10][11]. However, the passive dampers may potentially lead to insufficient damping to other concerned modes without increasing the damper installation location that may undesirably affect the esthetics of the bridge [12,13], especially for very long cables.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Semiactive Cable Vibration Control: A Frequency Domain Perspective

Chen

2017

Shock and Vibration

View full text Add to dashboard Cite

An adaptive solution to semiactive control of cable vibration is formulated by extending the linear quadratic Gaussian (LQG) control from time domain to frequency domain. Frequency shaping is introduced via the frequency dependent weights in the cost function to address the control effectiveness and robustness. The Hilbert-Huang transform (HHT) technique is further synthesized for online tuning of the controller gain adaptively to track the cable vibration evolution, which also obviates the iterative optimal gain selection for the trade-off between control performance and energy in the conventional time domain LQG (T-LQG) control. The developed adaptive frequency-shaped LQG (AF-LQG) control is realized by collocated self-sensing magnetorheological (MR) dampers considering the nonlinear damper dynamics for force tracking control. Performance of the AF-LQG control is numerically validated on a bridge cable transversely attached with a self-sensing MR damper. The results demonstrate the adaptivity in gain tuning of the AF-LQG control to target for the dominant cable mode for vibration energy dissipation, as well as its enhanced control efficacy over the optimal passive MR damping control and the T-LQG control for different excitation modes and damper locations.

show abstract

Estimation Curve for Modal Damping in Stay Cables with Viscous Damper

Cited by 299 publications

References 1 publication

The effectiveness of vibration damper attached to the cable due to wind action

The effectiveness of vibration damper attached to the cable due to wind action

Seismic Fragility Assessment of an Isolated Multipylon Cable-Stayed Bridge Using Shaking Table Tests

Adaptive Semiactive Cable Vibration Control: A Frequency Domain Perspective

Contact Info

Product

Resources

About