1. Prof., Dept. of Civ. Engrg., Dalian Univ. of Technol., Dalian 116024, China.
2. Assoc. Prof., Dept. of Civ. Engrg., Dalian Univ. of Technol., Dalian 116024, China.
3. Lect., Div. of Civ. Engrg., Cardiff Univ., Cardiff CF2 3TB, U.K.
4. Prof., Div. of Struct. Engrg., Cardiff Univ., Cardiff CF2 3TB, U.K.