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IN-SITU MEASUREMENTS OF VIBRATIONS OF ELASTICALLY SUPPORTED STEEL REINFORCED CONCRETE BRIDGE DURING CAR BRAKING

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Author(s): S. Yu. Gridnev | V. V. Volkov

Journal: Scientific Herald of the Voronezh State University of Architecture and Civil Engineering
ISSN 2075-0811

Volume: 9;
Issue: 1;
Start page: 11;
Date: 2011;
Original page

Keywords: span | dynamic tests | road bridge displacement | beam underside movement | rubber-metal supporting parts | braking

ABSTRACT
Problem statement. Dynamic effect of increasing transport flows is produced not only on bearing structures of bridges but also on supports, which leads to their uniform non-steady state deformation.Results and conclusions. An optical displacement controller is proposed to be used for remote record of vibrations of elastically supported steel reinforced concrete bridge and supporting part's deformation. Device structure, scheme of its calibration and of determination of maximum accuracy are described, as well as technique and results of dynamic tests of vibrations of elastically supported span of steel reinforced concrete bridge during single car braking with different accelerations in the beginning of braking in different cross-sections. The analysis of the results is performed.

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