1. Member, ASCE
2. Prof., School of Civ. Engrg. and Mech., Shanghai Jiao Tong Univ., Shanghai 200030, China.
3. Prof., Dept. of Civ. and Struct. Engrg., Hong Kong Polytechnic Univ., Hong Kong, China.
4. Res. Asst., Dept. of Civ. and Struct. Engrg., Hong Kong Polytechnic Univ., Hong Kong, China.