1. Postdoctoral Fellow, Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic Univ., Hong Kong, China; Newton International Fellow, Dept. of Engineering, Univ. of Cambridge, Cambridge CB2 1PZ, UK.
2. Professor, Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic Univ., Hong Kong, China (corresponding author).
3. Laing O’Rourke Associate Professor, Dept. of Engineering, Univ. of Cambridge, Cambridge CB2 1PZ, UK.