1. Assistant Professor, Dept. of Civil, Construction and Environmental Engineering, Univ. of Alabama, 213A Shelby Hall, Box 870205, Tuscaloosa, AL 35487-0205 (corresponding author).
2. Professor, Dept. of Civil, Construction and Environmental Engineering, Univ. of Alabama, 213B Shelby Hall, Box 870205, Tuscaloosa, AL 35487-0205.
3. Associate Professor, Dept. of Civil, Construction and Environmental Engineering, Univ. of Alabama, 3338A HM Comer Hall, Box 870205, Tuscaloosa, AL 35487-0205.