1. Assistant Professor, Dept. of Civil and Environmental Engineering, Tennessee Technological Univ., Cookeville, TN 38505 (corresponding author).
2. Associate Professor, Dept. of Civil, Architectural and Environmental Engineering, Drexel Univ., Philadelphia, PA 19104.
3. John Roebling Professor of Infrastructure Studies, Dept. of Civil, Architectural and Environmental Engineering, Drexel Univ., Philadelphia, PA 19104.