Predicting the non-linear critical speed for high-speed railways in singular geotechnical scenarios. Issue 165 (February 2023)

• Record Type: Journal Article
• Authors: Castanheira-Pinto, Alexandre; Fernández-Ruiz, Jesus; Costa, Pedro Alves
• Is Part Of: Soil dynamics and earthquake engineering. Issue 165(2023)
• Publication Date: 2023-02
• Subjects: Semi-analytical methodology -- Non-linear critical speed -- Dispersion curve -- Railway dynamics -- Non-linear soil behavior; Soil dynamics -- Periodicals; Earthquake engineering -- Periodicals; Sols -- Dynamique -- Périodiques; Génie parasismique -- Périodiques; 624.176205
• DOI: 10.1016/j.soildyn.2022.107722
• Languages: English
• ISSNs: 0267-7261

Abstract

Abstract: Studying and predicting the non-linear critical speed in high-speed railway lines is very costly in terms of computational efficiency. To overcome such particularity, the authors have proposed a simplified methodology based on dispersion curves combined with degraded ground properties, which is capable of predicting the non-linear critical speed with a low computational cost and a very acceptable accuracy. However, the application of this methodology is limited to normally dispersive geotechnical profiles. In this paper, the authors present and experimentally validate a novel methodology, similar to the one already published, which can be applied to any geotechnical scenarios. Highlights: A novel methodology is presented to predict the non-linear critical speed of railway tracks for any geotechnical stratification.