1. Ph.D. Candidate, Glenn Dept. of Civil Engineering, Clemson Univ., Clemson, SC 29634-0911 (corresponding author).
2. Assistant Professor, Glenn Dept. of Civil Engineering, Clemson Univ., Clemson, SC 29634-0911.
3. Assistant Professor, Gallogly College of Engineering, Univ. of Oklahoma, Norman, OK 73019-0390.