1. Associate Professor, Dept. of Civil and Environmental Engineering, Lehigh Univ., 117 ATLSS Dr., Bethlehem, PA 18015 (corresponding author).
2. Graduate Student, Dept. of Civil and Environmental Engineering, Lehigh Univ., 117 ATLSS Dr., Bethlehem, PA 18015.
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of Hawaii, Honolulu, HI 96822.
4. Professor, School of Civil and Construction Engineering, Oregon State Univ., Corvallis, OR 97331.