1. Graduate Student, Dept. of Civil and Environmental Engineering, Univ. of Tennessee-Knoxville, Knoxville, TN 37996.
2. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Tennessee-Knoxville, Knoxville, TN 37996 (corresponding author).
3. Research Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Tennessee-Knoxville, Knoxville, TN 37996.