1. Graduate Student, Dept. of Civil and Environmental Engineering, Univ. of Hawaii, Honolulu, HI 96822.
2. Professor, Dept. of Civil and Environmental Engineering, Univ. of Hawaii, Honolulu, HI 96822 (corresponding author).
3. Professor, Dept. of Mechanical Engineering, Univ. of Hawaii, Honolulu, HI 96822l.