1. Geotechnical and Structural Engineering Research Center, Shandong University, Jingshi Rd., Jinan, Shandong 250061, China (Corresponding author), e-mail: rentailiu@163.com
2. Geotechnical and Structural Engineering Research Center, Shandong University, Jingshi Rd., Jinan, Shandong 250061, China, https://orcid.org/0000-0001-9769-5774 (Z.Z.)