TO SUPPLY OF ALLOWABLE TRAINS MOVEMENT SPEED ON A FLOATING BRIDGE

Abstract

Purpose. This publication presents the results of calculations spans for floating bridges. Аim of this study is to determine the maximum speed of the vehicle, which did not lead to abnormal appearance to stresses and strains in the construction of the bridge. Methodology. This paper uses the comparative method, analytical methods for calculatingbridges calculations of strength, endurance, maximum shear stress. Findings. Increasing the length of pontoon even at 1m. (from 10,5 to 11,5 m) is accompanied by a decrease in displacement (and other derived parameters of the stress-strain state) span 4, 7, 9 times; for a certain size pontoons system loses much stability in the aquatic environment; section height pontoon not significantly affect the state span floating system; watercourse flow velocity significantly affects the stress-strain state of the floating bridge; The analysis of phase trajectories shows that fluctuations floating bridge in the aquatic environment are periodic, but not quite stable nature. Originality. Research allows you to make a new step in the detailed modeling of the floating bridge considering the velocity of temporary load. Practical value. Given that a single regulatory document that would regulate the procedure for determining Movement speed rail and road transport on floating bridges in Ukraine does not exist, the publication allows you todraw some conclusions that are universal to calculate allowable speed on floating bridges.