1. Professor, Dept. of Civil Engineering, Univ. of Texas at Arlington, P.O. Box 19308, Arlington, TX 76019 (corresponding author).
2. Formerly, Doctoral Student, Dept. of Civil and Environmental Engineering, Univ. of Texas at Arlington, P.O. Box 19308, Arlington, TX 76019.
3. Assistant Professor, Dept. of Civil and Environmental Engineering, South Dakota School of Mines and Technology, 501 E. Saint Joseph St., Rapid City, SD 57701.
4. Doctoral Student, Dept. of Civil and Environmental Engineering, Univ. of Texas at Arlington, P.O. Box 19308, Arlington, TX 76019.