1. Assistant Professor, Dept. of Civil and Environmental Engineering, South Dakota School of Mines and Technology, 501 E Saint Joseph Blvd., Rapid City, SD 57701.
2. Graduate Student and Research Assistant, Dept. of Civil and Environmental Engineering, South Dakota School of Mines and Technology, 501 E Saint Joseph Blvd., Rapid City, SD 57701.
3. Associate Professor, Dept. of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, 110 8th St., Troy, NY 12180 (corresponding author).