1. Graduate Research Assistant, Dept. of Civil, Construction, and Environmental Engineering, Univ. of Alabama, 251 H.M. Comer, Tuscaloosa, AL 35487.
2. Assistant Professor, Dept. of Civil, Construction and Environmental Engineering, Univ. of Alabama, 247 H.M. Comer, Tuscaloosa, AL 35487 (corresponding author).
3. Assistant Professor, Dept. of Civil, Construction and Environmental Engineering, Univ. of Alabama, 251 H.M. Comer, Tuscaloosa, AL 35487.