1. Doctoral Graduate, Dept. of Civil and Environmental Engineering, Univ. of Maryland-College Park, 1170 Glenn L. Martin Hall, 4298 Campus Dr., College Park, MD 20742 (corresponding author).
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Maryland-College Park, 1170 Glenn L. Martin Hall, 4298 Campus Dr., College Park, MD 20742.