1. Members, ASCE
2. Prof. and Dir., Protective Technol. Res. Ctr., School of Civ. and Struct. Engrg., Nanyang Technol. Univ., Singapore 639798. E-mail: cpan@ntu.edu.sg
3. Assoc. Prof., Grad. School of Sci. and Technol., Keio Univ., 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan. E-mail: mita@sd.keio.ac.jp
4. Res. Scholar, School of Civ. and Struct. Engrg., Nanyang Technol. Univ., Singapore 639798.