Steel and Composite Structures

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Optimization of a composite beam for high-speed railroads

  • Poliakov, Vladimir Y. (Bridges and Tunnels Department, Russian University of Transport) ;
  • Saurin, Vasyli V. (Institute of Problems of Mechanics, Russian Academy of Sciences)
  • Received : 2019.12.12
  • Accepted : 2020.11.02
  • Published : 2020.11.25
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Abstract

The paper describes an optimization method based on the mathematical model of interaction within multibody 'bridge-track-cars" dynamic system. The interaction is connected with considerable dynamic phenomena influenced by high traffic speed (up to 400 km/h) on high-speed railroads. The trend analysis of a structure is necessary to determine the direction and resource of optimizing the system. Thus, scientific methods of decision-making process are necessary. The process requires a great amount of information analysis dealing with behavior and changes of the "bridge-track-cars system" that consists of mechanisms and structures, including transitions. The paper shows the algorithm of multi-criteria optimization that can essentially reduce weight of a bridge superstructure using big data analysis. This reduction is carried out in accordance with the constraints that have to be satisfied in any case. Optimization of real steel-concrete beam is exemplified. It demonstrates possibility of measures that are offered by the algorithm.

Keywords

Acknowledgement

The research described in this paper was performed in Russian University of Transport and is supported by the Russian Science Foundation (grant 21-19-00023).

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