1. College of Civil Engineering, Taiyuan University of Technology, Taiyuan, China
2. School of Electric Power, Civil Engineering and Architecture, Shanxi University, Taiyuan, Shanxi, China
3. Department of Civil Engineering, Tsinghua University, Beijing, China
4. Department of Civil Engineering, British Columbia Institute of Technology, Burnaby, BC, Canada
5. School of Engineering, University of British Columbia, Kelowna, BC, Canada