Assessment of an Old Steel Railway Bridge Using Dynamic Tests.

Plachý, Tomáš; Polák, Michal; Ryjáček, Pavel

doi:10.1016/j.proeng.2017.09.555

Cited by 14 publications

(6 citation statements)

References 1 publication

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“…Focusing on historic metallic structures, inspections are mostly focused on the verification of the effects of corrosion including functionality of protective coatings, level of the corrosion (corrosion weakening and pits), fatigue (including the development of cracks, their depth, width, and length and stress concentration zones), occurrence of eccentricities in members and checks of system behaviour (functionality of joints and bearings, stress transfer). Regarding these goals, the following methods of surveys are considered [2][3][4][5] iii. Non-destructive (NDT) detection of cracking by time-of-flight diffraction, phased arrays, ultrasonic testing, magnetoscopic examination and eddy current testing iv.…”

Section: Invasiveness Of Structural Surveysmentioning

confidence: 99%

Heritage value assessment method – Application to historic steel bridgein prague

Eberhardt¹,

Pospíšil²,

Ryjáček³

et al. 2021

Int. J. CMEM

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Section: Invasiveness Of Structural Surveysmentioning

confidence: 99%

Heritage value assessment method – Application to historic steel bridgein prague

Eberhardt¹,

Pospíšil²,

Ryjáček³

et al. 2021

Int. J. CMEM

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“…A random function compiled on the basis of arrays of measurement data of vibration parameters ϕ is considered stationary (in the broad sense), i.e., with the average of M ϕ(t) → const, while the covariance function depends solely on the difference between arguments τ − K ϕ (τ) Discrete Fourier transformation [16][17][18][19][28][29][30][31][32] may be used to process digital signals. Auto-covariance function of one data array or inter-covariance function of two arrays K ϕ (τ) is expressed as follows [78]:…”

Section: Covariance Model Of Vibration Signal Parametersmentioning

confidence: 99%

“…The accurate assessment of DAF ensures sustainable management of existing bridges [1]. Assessing the main natural frequencies and mode forms of the bridge is of particular importance [19]. They can also be monitored using GAMMA Portable Radar Interferometer (GPRI) [20].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Dynamic Parameters of a Railway Bridge

et al. 2019

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This article analyses the dispersion of vibration accelerations of a railway bridge during the passage of a train, and presents an analysis of their parameters after the application of the theory of covariance functions. The measurements of vibration accelerations at the fixed points of the beams of the overlay of the bridge were recorded in the time scale as digital arrays (matrices). The values of inter-covariance functions of the arrays of data of measurements of digital vibration accelerations and the values of auto-covariance functions of the individual arrays, changing the quantization interval in the time scale, were calculated. The compiled software Matlab 7 in the operator package environment was used in calculations. This article aims at determining the interdependencies of results of vibrations of bridge points rather than at the impact which a train makes on a bridge without emphasizing the modal parameters of the bridge. The aforementioned interdependencies make it possible to predict the results of hard-to-reach points.

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“…The vibration of the bridge structure was induced by an excitation strategy. Then, the natural frequency, damping ratio, vibration mode and other structural parameters were measured, and used to evaluate the technical condition and overall stiffness of the bridge structure [21][22][23].…”

Section: Test Principlementioning

confidence: 99%

Dynamic and Static Load Tests on a Large-span Rigid-frame Bridge

Sun¹,

Lei²,

Sun³

2019

MMEP

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Dynamic and static load (DSL) tests provide an important tool for safety inspection of bridge structure. The test results reflect the actual working condition, bearing capacity and working performance of the bridge structure, laying a scientific basis for the operation safety of the bridge. This paper carries out the DSL tests on a rigid-frame bridge, details the loading plans and test process, and analyzes the stress state under static loads and the dynamic properties under dynamic loads. The results show that the bridge belongs to the elastic state under design load, and satisfies the requirements of the design and normal use in terms of bearing capacity, stiffness and working performance. The inspection method and findings of this research provide important references to the DST testing and evaluation of similar bridges.

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Assessment of an Old Steel Railway Bridge Using Dynamic Tests.

Cited by 14 publications

References 1 publication

Heritage value assessment method – Application to historic steel bridgein prague

Heritage value assessment method – Application to historic steel bridgein prague

Analysis of Dynamic Parameters of a Railway Bridge

Dynamic and Static Load Tests on a Large-span Rigid-frame Bridge

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