1. Consultant, Xpert Design and Diagnostics (XDD), 22 Marin Way, Unit 3, Stratham, NH 03885.
2. Research Assistant Professor, Dept. of Civil and Environmental Engineering, Washington State Univ., Pullman, WA 99164-2910.
3. Professor, Dept. of Civil and Environmental Engineering, Washington State Univ., Pullman, WA 99164-2910 (corresponding author).