1. Professor and Chair, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin, Madison, WI 53706 (corresponding author). E-mail: russell@engr.wisc.edu
2. Professor and Chair, Construction Engineering and Management Program, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin, Madison, WI 53706.
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin, Madison, WI 53706.
4. Technion–Israel Institute of Technology, Haifa 32000, Israel; presently, Visiting Professor, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin–Madison, 1415 Engineering Dr., Madison, WI 53706.