1. Graduate Research Assistant, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., 2414 Campus Shore Dr., Campus Box 7533, Raleigh, NC 27695 (corresponding author).
2. Distinguished Professor, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., 2414 Campus Shore Dr., Campus Box 7533, Raleigh, NC 27695.