1. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
2. School of Material Science and Engineering, Dalian University of Technology, Dalian 116024, China
3. Faculty of Engineering & Informatics, University of Bradford, Bradford BD7 1DP, United Kingdom
4. School of Civil Engineering, Dalian University of Technology, Dalian 116024, China