1. Professor, School of Civil Engineering, Guangzhou Univ., 230 Wai Huan Xi Rd., Guangzhou Higher Education Mega Center, Guangzhou 510006, PR China.
2. School of Civil Engineering, Guangzhou Univ., 230 Wai Huan Xi Rd., Guangzhou Higher Education Mega Center, Guangzhou 510006, PR China (corresponding author).
3. School of Civil Engineering, Guangzhou Univ., 230 Wai Huan Xi Rd., Guangzhou Higher Education Mega Center, Guangzhou 510006, PR China.
4. Professor, School of Civil Engineering, Harbin Institute of Technology, 73 Huanghe Rd., Nan’gang District, Harbin 150090, China.