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Interpolation Methods for Mathematical Descriptions of Measured Vertical Displacements of Bridge Objects

Rok Kamnik, Bostjan Kovacic, Andrej Strukelj, Nenad Gubeljak

In Centre for Geodesy, the displacement measurements of certain constructions have been performed for the last ten years. In this time, tue displacements on constructions such as bridges, viaducts, girder constructions, beams and loadbearing pre-fabricated walls have been measured with different methods. Analyses of results have shown interesting discoveries in simulation of displacements. For this purpose, the methods of polynomial interpolation and cubic splines were used which proved the connection between measured and calculated values. Interpolation methods provided mean values among loads. In this way, the appearance of cracks in the construction can be simulated and the effect of overloaded construction can be predicted; therefore renewed measurements are not needed.

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