1. Professor, Institute of Mathematical Physics, Zhejiang Sci-Tech Univ., Hangzhou 310018, China (corresponding author).
2. Engineer, China Jingye Engineering Corporation Limited, Shenzhen Branch, Shenzhen 518054, China.
3. Ph.D. Candidate, State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji Univ., Shanghai 200092, China.
4. Professor, Civil Engineering College, Xi'an Univ. of Architecture and Technology, Xi'an 710055, China.