1. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of South Carolina, 300 Main St., Columbia, SC 29208 (corresponding author).
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Florida International Univ., 10555 W. Flagler St., Miami, FL 33174.
3. Professor, Paul F. Kent Endowed Faculty Scholar, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205 North Mathews, Urbana, IL 61801.
4. Professor, William J. and Elaine F. Hall Endowed Professor, John Burkitt Webb Endowed Faculty Scholar, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205 North Mathews, Urbana, IL 61801.
5. Professor Emeritus, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205 North Mathews, Urbana, IL 61801.