1. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 3140 Newmark Civil Engineering Bldg., 205 North Mathews Ave., Urbana, IL 61801 (corresponding author).
2. Professor, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 3140 Newmark Civil Engineering Bldg., 205 North Mathews Ave., Urbana, IL 61801.
3. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 3140 Newmark Civil Engineering Bldg., 205 North Mathews Ave., Urbana, IL 61801.