1. Assoc. Prof., Civ. and Struct. Engrg. Dept., Hong Kong Polytechnic Univ., Hunghom, Hong Kong.
2. PhD Student, Civ. and Struct. Engrg. Dept., Hong Kong Polytechnic Univ., Hunghom, Hong Kong.
3. Assoc. Prof., Dept. of Civ. Engrg., Nanjing Univ. of Aeronautics and Astronautics, Nanjing, Jiangsu Province, People's Republic of China.