Seismic Behavior of Qinghai-Tibetan Railway Embankment in Permafrost Regions: A Case Study

The temperature is a critical factor that determines the unfrozen water content and ice in frozen soil. In view of mechanical properties soil depend on volume components four-phase systems, thus has significant impact behaviors deformation properties. thermal state embankment permafrost regions seasonal difference, then seismic performance alters with season. addition, highly influenced by earthquake motion, especially intensity. Combining these factors, numerical simulation was conducted this study. study, taking typical section Qinghai-Tibet Railway as an example, case study behavior carried out using dynamic explicit FEM code ABAQUS/Explicit. El Centro excitation different intensities performed analysis two distinct states extreme cold warm days were considered well. embankment, including acceleration responses, strain response, displacement studied effectively. This paper proposes approaches methods to failure mechanism infrastructures, results can serve scientific basis for resisting earthquakes preventing disasters regions.