1. Member, ASCE
2. Prof., Dept. of Civ. and Struct. Engrg., Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong. E-mail: cehklam@polyu.edu.hk
3. Res. Asst., Dept. of Civ. and Struct. Engrg., Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong. E-mail: cycheung@usa.com