1. Graduate Research Assistant, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., 2501 Stinson Dr., Raleigh, NC 27607.
2. Assistant Professor, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., 2501 Stinson Dr., Raleigh, NC 27607 (corresponding author).
3. E. I. Clancy Distinguished Professor, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., 2501 Stinson Dr., Raleigh, NC 27607.