1. Postdoctoral Fellow, Dept. of Civil and Environmental Engineering/School of Engineering, Hong Kong Univ. of Science and Technology, Kowloon, Hong Kong (corresponding author).
2. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Perugia, 06125 Perugia, Italy.
3. Chair Professor, Dept. of Civil and Environmental Engineering/School of Engineering, Hong Kong Univ. of Science and Technology, Kowloon, Hong Kong.
4. Professor, Dept. of Civil and Environmental Engineering, Univ. of Perugia, 06125 Perugia, Italy.