Szukana fraza: [Abstrakt = "Diagnostics of bridge structures are of particular importance with regard to heating network crossings, where the stability of the supporting structure is the main guarantor of failure\-free thermal energy transfer across the river. One of the particularly sensitive elements of this type of bridges is the uneven movement of their components caused by operational and atmospheric factors. In this respect, periodic trigonometric surveys of bridges seem to be invaluable giving an image of the displacements occurring on them. The article focuses on the estimation of displacement surveys of the heating bridge crossing, based on several series of observations of the suspension bridge, located in the north\-eastern part of Poznań. The measurements were preceded by a preliminary analysis of accuracy. To assess the deformation of the bridge, 64 natural controlled points were selected, located on both sides of the structure and supporting ropes, and 3 reference points located outside the tested object. Three measuring series were made and each was compared with the reference measurement from 2010. The results of the analysis are presented in tabular form as horizontal and vertical displacements from the base state. It was shown that the obtained accuracy parameters allow for a reliable assessment of the geometrical state of this class of construction."]

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