1. Professor, College of Civil Engineering and Architecture, Zhejiang Univ. of Technology, Hangzhou 310014, China; Visiting Scholar, Univ. of California, Los Angeles, CA 90095.
2. Postgraduate Researcher, College of Civil Engineering and Architecture, Zhejiang Univ. of Technology, Hangzhou 310014, China.
3. Assistant Professor, Dept. of Civil and Environmental Engineering, West Virginia Univ., P.O. Box 6103, Morgantown, WV 26506.
4. Professor, Dept. of Civil and Environmental Engineering, Univ. of California, Los Angeles, CA 90095 (corresponding author).