1. School of Civil Engineering, Central South University, Changsha 410075, China
2. MOE Key Laboratory of Engineering Structures of Heavy-Haul Railway, Central South University, Changsha 410075, China
3. Center for Railway Infrastructure Smart Monitoring and Management, Central South University, Changsha 410075, China
4. Guangxi Transportation Science and Technology Group Co., Ltd., Nanning 530006, China
5. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China