<abstract xmlns="http://www.w3.org/1999/xhtml">The aim of the work is to improve the methodology for the dynamic computation of simple beam spans during the impact of high-speed trains.Mathematical simulation utilizing numerical and analytical methods of structural mechanics is used in the research.The article analyses parameters of the effect of high-speed trains on simple beam spanning bridge structures and suggests a technique of determining of the dynamic index to the live load. Reliability of the proposed methodology is confirmed by results of numerical simulation of high-speed train passage over spans with different speeds. The proposed algorithm of dynamic computation is based on a connection between maximum acceleration of the span in the resonance mode of vibrations and the main factors of stress-strain state. The methodology allows determining maximum and also minimum values of the main efforts in the construction that makes possible to perform endurance tests. It is noted that dynamic additions for the components of the stress-strain state (bending moments, transverse force and vertical deflections) are different. This condition determines the necessity for differentiated approach to evaluation of dynamic coefficients performing design verification of I and II groups of limiting state. The practical importance: the methodology of determining the dynamic coefficients allows making dynamic calculation and determining the main efforts in split beam spans without numerical simulation and direct dynamic analysis that significantly reduces the labour costs for design.</abstract>

The aim of the work is to improve the methodology for the dynamic computation of simple beam spans during the impact of high-speed trains.Mathematical simulation utilizing numerical and analytical methods of structural mechanics is used in the research.The article analyses parameters of the effect of high-speed trains on simple beam spanning bridge structures and suggests a technique of determining of the dynamic index to the live load. Reliability of the proposed methodology is confirmed by results of numerical simulation of high-speed train passage over spans with different speeds. The proposed algorithm of dynamic computation is based on a connection between maximum acceleration of the span in the resonance mode of vibrations and the main factors of stress-strain state. The methodology allows determining maximum and also minimum values of the main efforts in the construction that makes possible to perform endurance tests. It is noted that dynamic additions for the components of the stress-strain state (bending moments, transverse force and vertical deflections) are different. This condition determines the necessity for differentiated approach to evaluation of dynamic coefficients performing design verification of I and II groups of limiting state. The practical importance: the methodology of determining the dynamic coefficients allows making dynamic calculation and determining the main efforts in split beam spans without numerical simulation and direct dynamic analysis that significantly reduces the labour costs for design.

Rating of Dynamic Coefficient for Simple Beam Bridge Design on High-Speed Railways

Emperor Alexander I Petersburg State Transport University

Civil and Environmental Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The aim of the work is to improve the methodology for the dynamic computation of simple beam spans during the impact of high-speed trains.Mathematical...

Rating of Dynamic Coefficient for Simple Beam Bridge Design on High-Speed Railways

Publié en ligne: 30 mai 2018

Pages: 37 - 43

DOI: https://doi.org/10.2478/cee-2018-0005

Mots clés
Bridge, Simple beam, HSR, High-speed, Dynamic interaction

© 2018 Leonid Diachenko et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Rating of Dynamic Coefficient for Simple Beam Bridge Design on High-Speed Railways

Publié en ligne: 30 mai 2018

Pages: 37 - 43

DOI: https://doi.org/10.2478/cee-2018-0005

Mots clésBridge, Simple beam, HSR, High-speed, Dynamic interaction

© 2018 Leonid Diachenko et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
Bridge, Simple beam, HSR, High-speed, Dynamic interaction