1. Professor, Key Laboratory of Roadway Bridge & Structure Engineering, Wuhan Univ. of Technology, 430070 Wuhan, China.
2. Professor, Dept. of Civil Engineering, Univ. of Patras, GR-26500 Patras, Greece.
3. Professor, Key Laboratory of Roadway Bridge & Structure Engineering, Wuhan Univ. of Technology, 430070 Wuhan, China (corresponding author).