1. Lecturer, School of Civil Engineering, Changsha Univ. of Science and Technology, No. 960 Wanjiali Rd., Changsha, Hunan 410114, China; Doctoral Student, Laboratoire d’Etude des Microstructures et de Mécanique des Matériaux, Univ. de Lorraine, Ile du Saulcy, Metz Cedex 01 57045, France.
2. Associate Professor, Laboratoire d’Etude des Microstructures et de Mécanique des Matériaux, Univ. de Lorraine, Ile du Saulcy, Metz Cedex 01 57045, France.
3. Professor, School of Civil Engineering, Changsha Univ. of Science and Technology, No. 960 Wanjiali Rd., Changsha, Hunan 410114, China (corresponding author).
4. Professor, Laboratoire d’Etude des Microstructures et de Mécanique des Matériaux, Univ. de Lorraine, Ile du Saulcy, Metz Cedex 01 57045, France.
5. Professor, School of Civil Engineering, Changsha Univ. of Science and Technology, No. 960 Wanjiali Rd., Changsha, Hunan 410114, China.