1. Dept. of Civil and Environmental Engineering, Tennessee Technological Univ., 1020 Stadium Dr., Cookeville, TN 38505 (corresponding author).
2. Tennessee Technological Univ., Cookeville, TN.
3. Univ. of Utah, Salt Lake City, UT.
4. Purdue Univ., West Lafayette, IN.
5. Univ. of Georgia, Athens, GA.
6. Univ. of Colorado, Boulder, CO.