1. Doctoral Student and Research Assistant, Dept. of Civil and Environmental Engineering, West Virginia Univ., Morgantown, WV 26506-6103.
2. Benedum Distinguished Teaching Professor, Dept. of Civil and Environmental Engineering, West Virginia Univ., Morgantown, WV 26506-6103 (corresponding author).
3. Research Assistant Professor, Dept. of Civil and Environmental Engineering, West Virginia Univ., Morgantown, WV 26506-6103.