1. Ph.D. Candidate, Dept. of Civil Engineering, Purdue Univ., West Lafayette, IN 47907 (corresponding author).
2. Professor, Dept. of Civil Engineering, Purdue Univ., West Lafayette, IN 47907.
3. Ph.D. Candidate, Dept. of Civil Engineering, Purdue Univ., West Lafayette, IN 47907.
4. Professor and Chair, Dept. of Civil, Structural and Environmental Engineering, Univ. at Buffalo, Buffalo, NY 14260.