1. College of Pipeline and Civil Engineering, China University of Petroleum, 66 W. Changjiang Rd., Huangdao District, Qingdao 266580, China
2. College of Pipeline and Civil Engineering, China University of Petroleum, 66 W. Changjiang Rd., Huangdao District, Qingdao 266580, China (Corresponding author), e-mail: yuwg421@hotmail.com, https://orcid.org/0000-0001-6209-1284