Strength Analysis of Load-Bearing Beams of Tubular Bridges

The length expansion of the tubular bridge spans indicates the need to improve the strength analysis of modern loads, which do not exclude a keyboard effect in the beam operation. Purpose : The purpose of this work is to study bending and torsion deformation and the keyboard effect in tubular bridge spans with reduced rigidity under difficult loading conditions. Research findings : The theoretical calculation for the stability of bridge spans is improved within the different range of [формула] relations. Value : A complex stress state of such bridge spans determines their spatial operation by changing the transverse pressure on the beams during bending and torsion deformation, and thus reflects the novelty and relevance of the research considered in the article.