A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Nonlinear Dynamic Analysis of Track Embankments for High-Speed Trains
With the first high speed trains (HST) emerging in the United States, it is critical to develop better understanding of the design and performance requirements for HST track embankments. One of the main challenges in this process is to determine proper track embankment design criteria, specifically stiffness criteria to meet the acceptable deformation limits considering the maximum design speed. This study investigates the long-term deformations of HST track embankments on soft clay subgrades. The required thickness and stiffness (deformation modulus) for track embankment layers to meet the maximum deformation criteria were evaluated for a typical at-grade embankment section. A nonlinear, three-dimensional finite element (FE) model was developed to simulate the track embankment dynamic behavior under HST loading. Results of the FE analyses showed that the maximum settlement resulted from the train cyclic loading was around the typical criteria adopted for the existing HSTs. Variations of the settlements with train loading cycles showed that the plastic deformations accumulated within the first 10 cycles and after that became stationary.
Nonlinear Dynamic Analysis of Track Embankments for High-Speed Trains
With the first high speed trains (HST) emerging in the United States, it is critical to develop better understanding of the design and performance requirements for HST track embankments. One of the main challenges in this process is to determine proper track embankment design criteria, specifically stiffness criteria to meet the acceptable deformation limits considering the maximum design speed. This study investigates the long-term deformations of HST track embankments on soft clay subgrades. The required thickness and stiffness (deformation modulus) for track embankment layers to meet the maximum deformation criteria were evaluated for a typical at-grade embankment section. A nonlinear, three-dimensional finite element (FE) model was developed to simulate the track embankment dynamic behavior under HST loading. Results of the FE analyses showed that the maximum settlement resulted from the train cyclic loading was around the typical criteria adopted for the existing HSTs. Variations of the settlements with train loading cycles showed that the plastic deformations accumulated within the first 10 cycles and after that became stationary.
Nonlinear Dynamic Analysis of Track Embankments for High-Speed Trains
Yousefpour, Negin (author) / Almog, Eden (author)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 95-105
2019-03-21
Conference paper
Electronic Resource
English
Nonlinear Dynamic Analysis of Track Embankments for High-Speed Trains
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