1. Graduate Research Assistant, Dept. of Civil Engineering, 238 Harbert Engineering Center, Auburn Univ., Auburn, AL 36849 (corresponding author).
2. Associate Professor, Dept. of Civil Engineering, 238 Harbert Engineering Center, Auburn Univ., Auburn, AL 36849.
3. Brasfield and Gorrie Professor of Construction Engineering and Management, Dept. of Civil Engineer, 238 Harbert Engineering Center, Auburn Univ., Auburn, AL 36849.