1. PhD Student, School of Civ. and Struct. Engrg., Nanyang Technol. Univ., Singapore 639798.
2. Asst. Prof., School of Civ. and Struct. Engrg., Nanyang Technol. Univ., Singapore 639798.
3. Prof., School of Civ. and Struct. Engrg., Nanyang Technol. Univ., Singapore 639798.