1. Ph.D. Candidate, Dept. of Civil, Construction and Environmental Engineering, North Carolina State Univ., Raleigh, NC 27695-7908 (corresponding author).
2. Professor, Dept. of Mechanical and Aerospace Engineering, North Carolina State Univ., Raleigh, NC 27695-7910.
3. Associate Professor, Dept. of Civil, Construction and Environmental Engineering, North Carolina State Univ., Raleigh, NC 27695-7908.