Safety of a bridge span with prestressed concrete beams
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Abstract
This article assesses the structural performance of a bridge overpass with a new type of reinforced concrete prestressed T-beams (TBN - abbreviation for stressed T-beams). Compared with VTK bridge beams (VTK - abbreviation: high-tech transportation construction), prestressed T-beams have technological advantages in the production process and during installation that allow for increased spacing, from 1400 mm for high-tech transport structure type beams to 2200 mm for prestressed T-beams. The study aims to evaluate the reliability of 24-m long prestressed T-beams and operation of their joints as part of a bridge overpass. Static testing of a bridge overpass was carried out using vehicles, with measurement of true deflections of the experimental beams and investigation of the operation of their joints as a part of the overpass. The calculated deflection values are determined using the finite element method in the Midas Civil software package. Test results showed the true and calculated deflections. The structural coefficients for the first and second test schemes were 0.79 and 0.81, respectively. This meets structural requirements. The structural coefficient is a criterion corresponding to the required load capacity for reliable operation of a structure under various force combinations.
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
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