1. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Missouri-Columbia, Columbia, MO 65211-2200 (corresponding author).
2. Professor, Dept. of Civil and Architectural Engineering, Univ. of Wyoming, Laramie, WY 82071.
3. Benedum Distinguished Teaching Professor, Dept. of Civil and Environmental Engineering, West Virginia Univ., Morgantown, WV 26506.