1. Ph.D. Research Assistant, Dept. of Civil and Environmental Engineering, Clarkson Univ., Potsdam, NY 13699.
2. Professor, Dept. of Civil and Environmental Engineering, Clarkson Univ., Potsdam, NY 13699 (corresponding author).
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of Connecticut, Storrs, CT 06269.