The use of polymer bearings with a given shear rigidity and viscoelasticity in the spans of pedestrian bridges makes it possible to effectively control the dynamic characteristics of the span. At the same time, taking into account the viscoelasticity of the bearings is not an easy task, since the attenuation coefficient that characterizes the dissipative properties of the span structure can only be calculated experimentally. In this paper, the dependencies between the basic parameters of span vibrations and the attenuation coefficient are specified. The similarity test is defined for the presented hypothesis. To compare the practical results with theoretical calculations, the materials of the R&D report “Dynamic parameters evaluation of a pedestrian bridge span on the Station 156 +32 at the object: Reconstruction of the road from the airport “Knevichi” to St. Sanatornaya on a hack of the highway M-60 “Ussuri” Khabarovsk-Vladivostok between 747-750 km” were used.
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