1. Res. Student, Dept. of Civ. and Struct. Engrg., The Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong Spec. Administrative Region, China.
2. Assoc. Prof., Dept. of Civ. and Struct. Engrg., The Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong Spec. Administrative Region, China.