1. Lecturer, Dept. Civil & Environmental Engineering, Southeast Univ., Nanjing 210096, China; Graduate Assistant, Dept. of Civil and Environmental Engineering, Univ. of Pittsburgh, Pittsburgh, PA.
2. Assistant Professor, Dept. Civil & Environmental Engineering, Univ. of Pittsburgh, Pittsburgh, PA 15206.
3. Professor, Dept. of Bridge Engineering, Tongji Univ., Shanghai 200092, China (corresponding author).