1. Former Research Assistant, Dept. of Civil, Construction and Environmental Engineering, Marquette Univ., 1250 W Wisconsin Ave., Milwaukee, WI 53201.
2. Associate Professor, Dept. of Civil, Construction and Environmental Engineering, Marquette Univ., 1250 W Wisconsin Ave., Milwaukee, WI 53201 (corresponding author).
3. Bicentennial Board of Visitors Faculty Fellow and Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Pittsburgh, 4200 Fifth Ave., Pittsburgh, PA 15260.
4. Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of Pittsburgh, 4200 Fifth Ave., Pittsburgh, PA 15260.