1. Research Fellow, Advanced Railroad Civil Engineering Div., Korea Railroad Research Institute, Euiwang Si, Kyunggi Do 16105, Republic of Korea (corresponding author). ORCID: .
2. Senior Researcher, Advanced Railroad Civil Engineering Div., Korea Railroad Research Institute, Euiwang Si, Kyunggi Do 16105, Republic of Korea.
3. Principal Researcher, Advanced Railroad Civil Engineering Div., Korea Railroad Research Institute, Euiwang Si, Kyunggi Do 16105, Republic of Korea.