1. Ph.D. Student, Institute of Geotechnical Engineering, Jiangsu Key Laboratory of Urban Underground Engineering and Environmental Safety, Southeast Univ., Nanjing 210096, China; formerly, Visiting Scholar, Dept. of Civil and Materials Engineering, Univ. of Illinois at Chicago, Chicago, IL 60607.
2. Professor, Dept. of Civil and Materials Engineering, Univ. of Illinois at Chicago, Chicago, IL 60607.
3. Professor, Institute of Geotechnical Engineering, Jiangsu Key Laboratory of Urban Underground Engineering and Environmental Safety, Southeast Univ., Nanjing 210096, China (corresponding author).