1. Student Member, ASCE
2. Member, ASCE
3. Doctoral Candidate, Dept. of Civ. and Envir. Engrg., Univ. of California, Berkeley, Berkeley, CA 94720.
4. Taisei Prof. of Civ. Engrg., Dept. of Civ. and Envir. Engrg., Univ. of California, Berkeley, Berkeley, CA.