1. Professor, Dept. of Civil Engineering, Dalian Univ. of Technology, Dalian, Liaoning 116024, China.
2. Associate Professor, Dept. of Civil Engineering, Dalian Univ. of Technology, Dalian, Liaoning 116024, China (corresponding author).
3. Graduate Student, Dept. of Civil Engineering, Dalian Univ. of Technology, Dalian, Liaoning 116024, China.