1. Assoc. Prof., Dept. of Civ. Engrg., Zhejiang Univ., Hangzhou 310027, China.
2. Prof., Dept. of Civ. and Struct. Engrg., Hong Kong Polytechnic Univ., Hong Kong, China. E-mail: cejgteng@polyu.edu.hk
3. Prof., Dept. of Civ. and Struct. Engrg., Hong Kong Polytechnic Univ., Hong Kong, China. E-mail: ceslchan@polyu.edu.hk