1. Visiting Assistant Professor, Glenn Dept. of Civil Engineering, Clemson Univ., Clemson, SC 29634; formerly, Research Assistant, Glenn Dept. of Civil Engineering, Clemson Univ., Clemson, SC 29634.
2. Assistant Professor, Glenn Dept. of Civil Engineering, Clemson Univ., Clemson, SC 29634.
3. Professor, Glenn Dept. of Civil Engineering, Clemson Univ., Clemson, SC 29634; and National Central Univ., Jhongli, Taoyuan 32001, Taiwan (corresponding author).