1. Professor, Dept. of Construction Management, College of Management and Economics, Tianjin Univ., 92 Weijin Rd., Tianjin 300072, China.
2. Lecturer, School of Engineering and Technology, Central Queensland Univ., 400 Kent St., Sydney, NSW 2000, Australia.
3. Ph.D. Candidate, Dept. of Construction Management, College of Management and Economics, Tianjin Univ., 92 Weijin Rd., Tianjin 300072, China (corresponding author).