1. Graduate Student, Glenn Dept. of Civil Engineering, Clemson Univ., Clemson, SC 29631.
2. Associate Professor, Civil Engineering, Glenn Dept. of Civil Engineering, Clemson Univ., Clemson, SC 29631 (corresponding author).
3. Associate Professor, Civil Engineering, Glenn Dept. of Civil Engineering, Clemson Univ., Clemson, SC 29631.