Stay Force Estimation in Cable-Stayed Bridges Using Stochastic Subspace Identification Methods

Zarbaf, Seyed Ehsan Haji Agha Mohammad; Norouzi, Mehdi; Allemang, Randall J.; Hunt, Victor J.; Helmicki, Arthur J.; Nims, Douglas

doi:10.1061/(asce)be.1943-5592.0001091

Cited by 36 publications

(8 citation statements)

References 31 publications

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“…When the external load is constant, the reduced force will be shared by the tie-beam and other hangers, increasing the cable force of the adjacent hanger, thus resulting in the redistribution of the cable force. Therefore, the cable damage can be evaluated by measuring the change of cable force or cable stress [5,[20][21][22]. A structure's frequency is usually used to measure the cable force in engineering [23], but this method is not accurate in measuring the force of a short cable.…”

Section: Introductionmentioning

confidence: 99%

Damage Identification in Hangers of Through-Arch Bridges Using Static Deflection Difference at the Anchorage Point

Wang

2021

Applied Sciences

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This study proposes a new damage identification method for hangers of arch bridges using the static deflection difference at the anchorage point of the hanger and the tie-beam. The relationship between the ratio of cable tension loss and the deflection difference at the anchorage point is studied. For the first time, the deflection difference influence matrix for hanger damage identification is defined. The static deflection change parameter is formulated as a function of the deflection difference influence matrix and the ratio of cable tension loss. The study shows that the percentage of cable tension loss can be obtained from the changes in static deflection at the anchorage point and the deflection difference influence matrix. Therefore, by observing a plot of the ratio of cable tension loss, the damage locations can be identified conveniently. Numerical and laboratory studies show that this method can accurately locate the damaged hanger of through-arch bridges under various scenarios. The proposed damage detection method has a clear theoretical base and is simple to operate, and it is suitable for practical engineering.

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Section: Introductionmentioning

confidence: 99%

Damage Identification in Hangers of Through-Arch Bridges Using Static Deflection Difference at the Anchorage Point

Wang

2021

Applied Sciences

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“…Therefore, an analysis method capable of efficiently measuring the responses of cables is required for the constant monitoring of remote cables . Moreover, along with studies on cable tension measurement and estimation accuracy improvement, many studies have also been conducted to make the cable tension estimation process more efficient and convenient . The method of using vision‐based systems is noncontact and economical, thus being suitable for cable tension estimation using indirect methods with limited accessibility.…”

Section: Introductionmentioning

confidence: 99%

“…[23][24][25][26][27] Moreover, along with studies on cable tension measurement and estimation accuracy improvement, many studies have also been conducted to make the cable tension estimation process more efficient and convenient. 5,[28][29][30][31] The method of using vision-based systems is noncontact and economical, thus being suitable for cable tension estimation using indirect methods with limited accessibility.…”

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confidence: 99%

Image‐based back analysis for tension estimation of suspension bridge hanger cables

Kim

Cheung

Park³

et al. 2020

Struct Control Health Monit

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Summary In suspension bridges, hanger cables are the main load‐supporting members. The tension of the hanger cables of a suspension bridge is a very important parameter for assessing the integrity and safety of the bridge. In general, indirect methods are used to measure the tension of the hanger cables of a suspension bridge in use. A representative indirect method is the vibration method, which extracts modal frequencies from the cables' responses and then measures the cable tension using the cables' geometric conditions and the modal frequencies. In this study, ambient vibration tests were conducted on a suspension bridge in use to verify the validity of the image‐based back analysis method, which can estimate the tension of remote hanger cables using the modal frequencies as a parameter. The tension estimated through back analysis, which was conducted to minimize the difference between the modal frequencies calculated using finite element analysis of the hanger cables and the measured modal frequencies, was compared with that measured using the vibration method. It was confirmed that reliable tension estimation is possible even with low‐order modal frequencies when the image‐based back analysis method is used.

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“…The method using the frequency to calculate the cable tension is called as the frequency-based method. Since the frequency test is a very mature technology with easy operation and low cost, the frequency-based method becomes the most commonly used method in practical applications [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Tension estimation of hangers with shock absorber in suspension bridge using finite element method

Gan¹,

Huang²,

Wang³

et al. 2019

J. vibroeng.

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Accurate and efficient estimation of tension in hangers is very important since hangers are the vital component of suspension bridges. But for hangers with shock absorber, the existing tension estimation methods are not suitable because they are based on a single cable model and cannot consider the effect of shock absorbers. To this end, the effect of the shock absorber is taken into account by using the degree-of-freedom condensation method, and a finite element method for tension estimation of hangers with shock absorber is proposed in this paper. Finally, the proposed method is applied in the Aizhai Bridge and Huangpu Pearl River Bridge to estimate the tension of hangers with shock absorber, the tested results show that as compared with other methods, the proposed method is a more accurate and convenient method for engineering application.

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Stay Force Estimation in Cable-Stayed Bridges Using Stochastic Subspace Identification Methods

Cited by 36 publications

References 31 publications

Damage Identification in Hangers of Through-Arch Bridges Using Static Deflection Difference at the Anchorage Point

Damage Identification in Hangers of Through-Arch Bridges Using Static Deflection Difference at the Anchorage Point

Image‐based back analysis for tension estimation of suspension bridge hanger cables

Tension estimation of hangers with shock absorber in suspension bridge using finite element method

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