1. Postdoctoral, Dept. of Civil Engineering, Tsinghua Univ., Beijing 100084, China. ORCID:
2. Associate Professor, Dept. of Civil Engineering, Tsinghua Univ., Beijing 100084, China (corresponding author).
3. Edmund K. Turner Professor, Dept. of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139. ORCID: