1. Associate Professor, School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430073, China.
2. Graduate Student, School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430073, China.
3. Professor, Dept. of Civil Engineering, Meijo Univ., 1-501 Shiogamaguchi, Tempaku-ku, Nagoya 468-8502, Japan.
4. Professor, School of Civil Engineering and Mechanics, Huazhong Univ. of Science and Technology, Wuhan 430074, China (corresponding author).