1. Professor, College of Civil Engineering and Architecture, Hebei Univ., Baoding 071002, China; Technology Innovation Center for Testing and Evaluation in Civil Engineering of Hebei Province, Hebei Univ., Baoding 071002, China. ORCID:
2. Senior Lecturer, Dept. of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK (corresponding author). ORCID: .