1. Ph.D. Candidate, Southeast Univ., Nanjing 210096, P. R. China.
2. Professor, Key Laboratory of Concrete and Prestressed Concrete Structures, Ministry of Education, Southeast Univ., Nanjing 210096, P. R. China (corresponding author).
3. Senior Engineer, Weidlinger Transportation Practice, Thornton Tomasetti, Inc., New York, NY 10005.