1. Lecturer, School of Civil Engineering, Shenzhen Univ., Shenzhen, Guangdong 518060, China.
2. Assistant Professor, Dept. of Building, National Univ. of Singapore, 4 Architecture Dr., Singapore 125677 (corresponding author).
3. Professor and Head, Dept. of Construction Management and Real Estate, Tongji Univ., Shanghai 200092, China.