1. Assistant Professor, School of Building Construction, Georgia Tech, 280 Ferst Dr., Atlanta, GA 30332 (corresponding author).
2. Vecellio Professor, Dept. of Civil and Environmental Engineering, Virginia Tech, 750 Drillfield, Blacksburg, VA 24061.
3. Ph.D. Graduate, School of Building Construction, Georgia Tech, 280 Ferst Dr., Atlanta, GA 30332.