1. Graduate Student, Dept. of Civil and Environmental Engineering, Lehigh Univ., Bethlehem, PA 18015.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Lehigh Univ., Bethlehem, PA 18015 (corresponding author).
3. Associate Professor, Dept. of Civil and Environmental Engineering, Lehigh Univ., Bethlehem, PA 18015.