1. Lecturer, School of Civil Engineering and Architecture, Central South Univ., Hunan, China; and Dept. of Structural Engineering, Magnel Laboratory for Concrete Research, Ghent, Belgium.
2. Professor, College of Civil Engineering, Hunan Univ., Hunan, China.
3. Professor, Dept. of Structural Engineering, Magnel Laboratory for Concrete Research, Ghent, Belgium.
4. Professor, School of Civil Engineering and Architecture, Central South Univ., Hunan, China.
5. Ph.D. Student, School of Civil Engineering and Architecture, Central South Univ., Hunan, China.