1. Associate Professor Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, and National Prestress Engineering Research Center, Southeast University, Nanjing 211189, China e-mail:
2. Creative Design Engineering Lab, Division of Industrial Design, School of Engineering, University of Liverpool, London Campus, London EC2A 1AG, UK e-mail:
3. School of Civil Engineering, Southeast University, Nanjing 211189, China e-mail:
4. Aeronautics Department, Imperial College London, South Kensington Campus, London SW7 2AZ, UK e-mail:
5. Professor National Prestress Engineering Research Center, and Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 211189, China e-mail: