1. Construction Engineering and Management, Department of Civil, Environmental, and Architectural Engineering, University of Colorado at Boulder, 1111 Engineering Drive, UCB 428, Boulder, CO 80309-0428, USA.
2. School of Civil and Environmental Engineering, Oklahoma State University, 207 Engineering South, Stillwater, OK 74078, USA.
3. Department of Civil Engineering, University of Kentucky, 151A Raymond Building, Lexington, KY 40506, USA.