1. Roebling Professor of Infrastructure Studies, Dept. of Civil, Architectural, and Environmental Engineering, Drexel Univ., 3141 Chestnut St., Philadelphia, PA 19104.
2. Associate Professor, Dept. of Civil, Architectural, and Environmental Engineering, Drexel Univ., 3141 Chestnut St., Philadelphia, PA 19104.
3. Assistant Professor, Dept. of Civil, Architectural, and Environmental Engineering, Drexel Univ., 3141 Chestnut St., Philadelphia, PA 19104.
4. Assistant Professor, Dept. of Civil, Architectural, and Environmental Engineering, Drexel Univ., 3141 Chestnut St., Philadelphia, PA 19104 (corresponding author).