Dynamic testing of cable structures

Caetano, Elsa; Cunha, Álvaro

doi:10.1051/matecconf/20152401002

Cited by 7 publications

(5 citation statements)

References 16 publications

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“…Values of ε typical of stay cables are lower than 0.01 [6,7,45]. Slightly higher values of ε, up to ε = 0.02 − 0.03, can also be found in cement-grouted parallel-bundle wire cables used in stayed bridges [24,9] or in comparatively shorter cables used e.g.…”

Section: Non-dimensional Formulationmentioning

confidence: 99%

“…The most simple axial force identification strategy proposed in the literature relies on the adoption of the taut string model [17,7], whose natural circular frequencies Ω (ts) k are given by…”

Section: Parameter Identification Problemmentioning

confidence: 99%

“…( 44) the combined uncertainty σT on the estimated valueT of the cable axial force can be evaluated through the well-known first-order accurate expression (e.g. [17,7]):…”

Section: Parameter Identification Problemmentioning

confidence: 99%

“…[47]) and dynamic (e.g. [17,6,7]) testing can be effectively used to get axial force estimates. Dynamic testing techniques have been thoroughly investigated in the past decades and are nowadays widely employed in practice, since they can be performed in operational conditions and provide the ground for quick and cheap structural parameter identification procedures [25,4,13,58,40].…”

Section: Introductionmentioning

confidence: 99%

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On the identification of the axial force and bending stiffness of stay cables anchored to flexible supports

Foti

Geuzaine

Denoël

2021

Applied Mathematical Modelling

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The generic model of a cable with small bending stiffness and anchored to flexible supports in rotation and translation is considered. An asymptotic analysis of the natural frequencies of this generic model is derived and shows that, for small bending stiffness, the first few natural frequencies can be expressed as a function of the cable axial force, the small bending stiffness and a single dimensionless group collecting the information of all other problem parameters. This formulation is used to develop an identification procedure of the cable axial force. Two formulations are proposed, one numerical and one semi-analytical based on a simple linear regression model. Both methods do not attempt at separately identifying the problem parameters since the observability analysis has revealed that only the cable axial force, the bending stiffness and the dimensionless group can be identified. In particular, the second method is very simple to implement and provides estimates of the cable axial force which account for the flexibility of the support. The proposed method can therefore be seen as an extension of usual identification techniques based on linear regressions of natural frequencies vs. mode number relations, by considering at the same time the bending stiffness and the deformability of supports. Being simple and robust as shown by means of an uncertainty quantification analysis, the proposed method can be conveniently embedded in the framework of a continuous monitoring strategy.

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Section: Non-dimensional Formulationmentioning

confidence: 99%

Section: Parameter Identification Problemmentioning

confidence: 99%

“…( 44) the combined uncertainty σT on the estimated valueT of the cable axial force can be evaluated through the well-known first-order accurate expression (e.g. [17,7]):…”

Section: Parameter Identification Problemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On the identification of the axial force and bending stiffness of stay cables anchored to flexible supports

Foti

Geuzaine

Denoël

2021

Applied Mathematical Modelling

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“…The rejects can be minimized through the improved technology to control the product major characteristics, namely capacitance per unit length [1,2], eccentricity [3], outer diameter [4], insulation integrity [5] and others parameters [6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Diameter Calculation in Contactless Three-Axis Measuring Devices

Fedorov

Koba

2016

MATEC Web Conf.

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Abstract. The paper presents a three-dimensional method of measuring diameter and ovality of cylindrical objects in diverging laser beam. Mathematical software method is developed. Virtual simulation of this method and experimental testing are made. The results can be used for design and manufacture of optical devices, which will be used for technological control of external diameter of cable, wire, trumpet and other products.

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Experimental and theoretical evaluation of axial forces in short steel ropes

Ároch,

Kováč,

Venglár

et al. 2024

ce papers

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Assessing rope force in bridge structural health monitoring, particularly for shorter lengths, poses challenges. The vibration method, commonly utilized for taut strings, yields inaccurate results for short ropes due to neglecting bending stiffness. To address this, the differential equation of lateral vibration of a prismatic beam possessing bending stiffness EI, evenly distributed mass m under the tension force N is solved approximately and numerically using FEM for greater accuracy. Nonlinear fitting via the Gauss‐Newton aids in refining results. Laboratory experiments, varying axial forces and rope characteristics, validated these methods, offering recommendations for improved accuracy.

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Dynamic testing of cable structures

Cited by 7 publications

References 16 publications

On the identification of the axial force and bending stiffness of stay cables anchored to flexible supports

On the identification of the axial force and bending stiffness of stay cables anchored to flexible supports

Diameter Calculation in Contactless Three-Axis Measuring Devices

Experimental and theoretical evaluation of axial forces in short steel ropes

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