1. Graduate Student, Dept. of Civil and Environmental Engineering, Tennessee Technological Univ., Cookeville, TN 38505-0001.
2. Associate Professor, Dept. of Civil and Environmental Engineering, Tennessee Technological Univ., Cookeville, TN 38505-0001 (corresponding author).
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Tennessee Technological Univ., Cookeville, TN 38505-0001.