1. School of Civil Engineering, Changsha University of S&T, Changsha, Hunan, 410114, China
2. Department of Civil Engineering, Central South University, Changsha, Hunan, 410075, China
3. Department of Civil, Architectural, and Environmental Engineering, Missouri S&T, Rolla, MO 65409-0030, USA
4. Department of Civil, Architectural, and Environmental Engineering, Missouri S&T, 135 Butler Carlton Hall, Rolla, MO 65409-0030, USA