1. Postdoctoral Associate, Computing in Engineering, Ruhr-Universtät Bochum, Building IA 6/150, Universitätsstraße 150, 44801 Bochum, Germany (corresponding author).
2. Ph.D. Student, School of Civil and Environmental Engineering, Georgia Institute of Technology, 130 Hinman Research Building, 723 Cherry St. NW, Atlanta, GA 30332.
3. Laing O’Rourke Lecturer of Construction Engineering, Dept. of Engineering, Univ. of Cambridge, BC2-07, Trumpington St., Cambridge CB2 1PZ, UK; formerly, Assistant Professor, School of Civil and Environmental Engineering, Georgia Institute of Technology, 328 Sustainable Education Building, 788 Atlantic Dr. NW, Atlanta, GA 30332.