1. Adjunct Instructor, Dept. of Civil and Environmental Engineering, Univ. of Missouri, Columbia, MO 65211-2200.
2. Professor, Dept. of Civil and Environmental Engineering, Univ. of Missouri, Columbia, MO 65211-2200 (corresponding author).
3. Postdoctoral Research Fellow, Dept. of Civil and Environmental Engineering, Univ. of Missouri, Columbia, MO 65211-2200.