1. Ph.D. Candidate, School of Civil Engineering, Dalian Univ. of Technology, Dalian 116024, China.
2. Associate Professor, School of Civil Engineering, Dalian Univ. of Technology, Dalian 116024, China (corresponding author).
3. Robert M. Moran Professor, NatHaz Modeling Laboratory, Univ. of Notre Dame, Notre Dame, IN 46556.
4. Professor, School of Civil Engineering, Dalian Univ. of Technology, Dalian 116024, China.