Application of Laser Vibrometer to the Measurement and Control of Cable Tensile Forces in Cable-Stayed Bridges

Kim, Cheol-Hwan; Jo, Byung-Wan; Jun, Jin-Taek

doi:10.1155/2012/810682

Cited by 11 publications

(5 citation statements)

References 7 publications

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“…Consequently, all modern measuring technologies for bridge structures can be divided into three groups. The first group includes the use of radar systems of millimeter and optical ranges of electromagnetic waves [10][11][12][13][14][15] for estimation of deformations and deflections of bridge elements, including stay-cables which support the buildings. For this purpose, in particular, phase interferometers with a high-resolution range are used.…”

Section: Special Issue On Advancement In Engineering Technologymentioning

confidence: 99%

Measurement of the Bridge Surface Deflections Using Near-Field Amplitude of Secondary Radiators System

Poliarus¹,

Poliakov²,

Lebedynskyi³

et al. 2017

Adv. sci. technol. eng. syst. j.

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Section: Special Issue On Advancement In Engineering Technologymentioning

confidence: 99%

Measurement of the Bridge Surface Deflections Using Near-Field Amplitude of Secondary Radiators System

Poliarus¹,

Poliakov²,

Lebedynskyi³

et al. 2017

Adv. sci. technol. eng. syst. j.

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“…The natural frequencies of the cable can then be obtained by the frequency response spectrum. Another option for monitoring cable frequencies from large distance is using laser vibrometer, which can speed up the vibration process, and the feasibility of this technique has been validated [36]. However, the assumption on chord may not reflect the actual cable boundary conditions and nonlinearity of cables caused by sag.…”

Section: Design Of Sensor Modules and Sensing Technologiesmentioning

confidence: 99%

The state of the art in structural health monitoring of cable-stayed bridges

2015

J Civil Struct Health Monit

202

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Cable-stayed bridges are a type of long-span bridges that have been extensively constructed throughout the world. However, cable-stayed bridges suffer from a variety of performance deteriorations and natural disasters during their service time. Structural health monitoring, having emerged since the early 1990s, is regarded as an in situ field experimental technique to understand the behaviors and performance of real, full-scale bridges under real loadings and environmental conditions and to further ensure the safety, serviceability, durability, and sustainability of bridges. In this paper, the existing various monitoring technologies for cable-stayed bridges developed are overviewed. The design approaches of structural health monitoring systems for cable-stayed bridges are introduced. The data analysis, modeling, and safety evaluation of cable-stayed bridges based on structural health monitoring technology are addressed. The applications of structural health monitoring technology for cablestayed bridges are summarized. The design code for structural health monitoring systems is described for large highway bridges (including cable-stayed bridges) that are authorized by the Ministry of Transportation in China. Finally, this study discusses the challenges and future trends in structural health monitoring technologies for cable-stayed bridges, particularly for data-driven science and technology in structural health monitoring field.

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“…Sensors for measuring the responses of a cable can be installed and utilized in existing bridges, but they are difficult to install. To address this problem, studies on efficient and convenient cable tension measurement methods using a laser vibrometer, elastomagnetic sensors, fiber Bragg grating sensors, and ultrasonic waves have been continually conducted.…”

Section: Introductionmentioning

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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Application of Laser Vibrometer to the Measurement and Control of Cable Tensile Forces in Cable-Stayed Bridges

Cited by 11 publications

References 7 publications

Measurement of the Bridge Surface Deflections Using Near-Field Amplitude of Secondary Radiators System

Measurement of the Bridge Surface Deflections Using Near-Field Amplitude of Secondary Radiators System

The state of the art in structural health monitoring of cable-stayed bridges

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

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