Monitoring of a concrete roof using terrestrial laser scanning

Erdélyi, Ján; Kopáčik, Alojz; Ilkovičová, Ľubica; Lipták, Imrich; Kajánek, Pavol

doi:10.14311/gi.13.3

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(2 citation statements)

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“…Values of correlation function in its extremes were compared with critical value of Pearson correlation coefficient - (2). For n = 24 (24 epochs of measurement) is r k = 0, 413.…”

Section: Time Shift Between Temperature and Vertical Displacementmentioning

confidence: 99%

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Temperature effects on the bridge structure during the all-day monitoring

Michal

Urban

2015

Geoinformatics FCE CTU

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<p>In current time the large amount of pre-stressed bridge structures is used. Their horizontal and vertical displacements are well predicted, but for verification of theoretical results is necessary to measure real displacements of these structures depending on external conditions. Given by the complexity of the design and by the inhomogeneity of external influences (especially temperature of the atmosphere, insolation, wind speed, etc.) cannot yet be reliably determined the changes of the construction caused by the immediate state of the environment and to distinguish them from irreversible (permanent) deformation of the structure.</p><p>In this paper the deflection line of the bridge of general Chábera over river Labe during the all-day monitoring will be analyzed. There is dense coverage of stabilized points enabling accurate approximation of the displacement of the bridge structure. The paper is focused especially on temperature effects on the bridge structure. The temperature changes cause the deformation of the construction not immediately, but with the time shift between change of temperature and structure deformation. Although the points are stabilized on both sides of the bridge deck, for the analysis of results were used only the points on the left side of the main span, where the biggest vertical displacements was detected. For testing of dependence of the time shift between the structure deformations and the structure temperature the Pearson coefficient of correlation was used.</p>

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“…Values of correlation function in its extremes were compared with critical value of Pearson correlation coefficient - (2). For n = 24 (24 epochs of measurement) is r k = 0, 413.…”

Section: Time Shift Between Temperature and Vertical Displacementmentioning

confidence: 99%

“…Displacements with high frequency can be measured by Ground-Based (GB) radar interferometry. This new technology can be effectively used for measuring of steel bridges with high accuracy, because there is no need to stabilize and signalized the measured points [2]. GB radar interferometry can be used for concrete structures also.…”

Section: Introductionmentioning

confidence: 99%

Temperature effects on the bridge structure during the all-day monitoring

Michal

Urban

2015

Geoinformatics FCE CTU

View full text Add to dashboard Cite

show abstract

Monitoring of a concrete roof using terrestrial laser scanning

Cited by 1 publication

References 1 publication

Temperature effects on the bridge structure during the all-day monitoring

Temperature effects on the bridge structure during the all-day monitoring

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