Cable-Stayed Bridges: Case Study for Ambient Vibration-Based Cable Tension Estimation

Kangas, Scott; Helmicki, Arthur J.; Hunt, Victor J.; Sexton, R.; Swanson, James A.

doi:10.1061/(asce)be.1943-5592.0000364

Cited by 53 publications

(13 citation statements)

References 9 publications

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“…e pressure sensor method can only test the cable force with the pressure sensor installed in advance in the construction and cannot be used without sensors after the bridge is completed [4]. e frequency method [8][9][10][11] is widely used because of its simple equipment, high reliability, and accuracy of cable force results, which can meet the requirements of repeated tests in engineering. e main steps are as follows: the natural frequency of the cable is firstly analyzed by vibration signal of the cable; next one brings the natural frequency into the relationship between the cable force and the natural frequency and then obtains the cable force.…”

Section: Introductionmentioning

confidence: 99%

An Accurate Measurement Method for Tension Force of Short Cable by Additional Mass Block

Li¹,

Wang

Hua³

et al. 2021

Advances in Materials Science and Engineering

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The equivalent effective length parameter is introduced into the vibration equation of short cable; that is, the boundary condition that affects the test accuracy of short cable force is equivalent to the calculated length of cable. By attaching an additional mass block to the cable, new parameters are introduced to identify the tension force. Vibration differential equations are established for cable with and without addition mass block, taking new parameters into account, such as equivalent effective length and added mass. By solving the equations using the RITZ method, the analytical relationship between the natural frequency of cable and equivalent effective length before and after a mass block is added can be developed. It can also develop an analytical method to identify the equivalent effective length depending on whether the added mass block is attached. Then, tension force of short length cable can be evaluated by measuring its natural frequency based on equivalent effective length. The method is verified by field tests. The tests results indicate the new method mentioned in this paper is going to largely improve the accuracy of tension force measurement of short length cable.

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Section: Introductionmentioning

confidence: 99%

An Accurate Measurement Method for Tension Force of Short Cable by Additional Mass Block

Li¹,

Wang

Hua³

et al. 2021

Advances in Materials Science and Engineering

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“…It was indicated that the periodic variation of the cable tension induced by the deck vibration would cause the parametric resonance of the stay cable under certain tuning conditions. The estimation of the ambient vibration-based cable tension in a case study was investigated by Kangas et al [36]. Some experiments were accomplished to determine the application viability of the traditional vibration techniques to evaluate the cable tension.…”

Section: Introductionmentioning

confidence: 99%

Formulating the optimum parameters of modified hanger system in the cable-arch bridge to restrain force fluctuation and overstressing problems

Farahmand‐Tabar

Barghian

2020

J Braz. Soc. Mech. Sci. Eng.

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Inclined hangers behave better than vertical ones under lateral loads (i.e., wind or earthquake) despite they are prone to fatigue phenomenon. In some instances, the slackness problem is seen in some inclined hangers, while others may become overstressed. By considering the modified hanger system, the disadvantages of vertical and inclined systems are resolved, while keeping their advantages. The objective of this study is to propose formulations for the optimum application of novel arrangement of hangers in a cable-arch bridge to suppress problems such as overstressing, force fluctuation, and decreasing the probability of fatigue phenomenon in hangers. To define optimum parameters, the modified hanger system was analyzed and compared with vertical and inclined ones considering nonlinear static analysis under dead load as an initial state plus seismic excitation and dynamic impact load of vehicles. Results indicate that the modified hanger system is improved remarkably in comparison with the inclined and vertical hanger systems.

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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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Cable-Stayed Bridges: Case Study for Ambient Vibration-Based Cable Tension Estimation

Cited by 53 publications

References 9 publications

An Accurate Measurement Method for Tension Force of Short Cable by Additional Mass Block

An Accurate Measurement Method for Tension Force of Short Cable by Additional Mass Block

Formulating the optimum parameters of modified hanger system in the cable-arch bridge to restrain force fluctuation and overstressing problems

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

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