1. Assoc. Prof., Dept. of Civ. Engrg., Hong Kong Univ. of Sci. and Technol., KLN, Hong Kong (corresponding author). E-mail: zongjin@ ust.hk
2. Postdoctoral Res. Sci., Dept. of Civ. Engrg. and Engrg. Mech., Columbia Univ., New York, NY 10027.
3. RA, Dept. of Civ. Engrg., Hong Kong Univ. of Sci. and Technol., KLN, Hong Kong.