1. Ph.D. Candidate, College of Civil Engineering and Mechanics, Huazhong Univ. of Science and Technology, Wuhan 430074, China; and College of Civil and Hydroelectric Engineering, Three Gorges Univ., Yichang, Hubei 443002, China.
2. Professor, College of Civil Engineering and Mechanics, Huazhong Univ. of Science and Technology, Wuhan 430074, China (corresponding author).
3. Professor, College of Civil Engineering and Mechanics, Huazhong Univ. of Science and Technology, Wuhan 430074, China.