1. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Tennessee Technological Univ., P.O. Box 5015, Cookeville, TN 38505.
2. Associate Professor, Dept. of Civil and Environmental Engineering, Tennessee Technological Univ., P.O. Box 5015, Cookeville, TN 38505 (corresponding author).
3. Professor and Head, Dept. of Civil and Architectural Engineering, Univ. of Wyoming, Laramie, WY 82071.
4. Programming Engineer, BridgeTech, Inc., Laramie, WY 82070.
5. Professor, Dept. of Civil and Environmental Engineering, Univ. of Delaware, Newark, DE 19716.