1. Postdoctoral Fellow, Dept. of Civil Engineering, Auburn Univ., 238 Harbert Engineering Center, Auburn, AL 36849 (corresponding author).
2. Brasfield & Gorrie Associate Professor, Dept. of Civil Engineering, Auburn Univ., 233 Harbert Engineering Center, Auburn, AL 36849.
3. Arthur H. Feagin Chair Professor, Dept. of Civil Engineering, Auburn Univ., 229 Harbert Engineering Center, Auburn, AL 36849.
4. Graduate Research Assistant, Dept. of Civil Engineering, Auburn Univ., 238 Harbert Engineering Center, Auburn, AL 36849.