1. Ph.D. Candidate, Key Laboratory of C&PC Structures of the Ministry of Education, Southeast Univ., Nanjing 211189, China.
2. Professor, Key Laboratory of C&PC Structures of the Ministry of Education, Southeast Univ., Nanjing 211189, China (corresponding author).
3. Professor, Dept. of Mechanical and Aerospace Engineering, North Carolina State Univ., Raleigh, NC 27695.