1. Lecturer, Dept. of Civil Engineering, Univ. of Kerbala, Kerbala 56001, Iraq; formerly, Ph.D. Student, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Kansas, 1530 W. 15th St., Lawrence, KS 66045-7609. ORCID: .
2. Glenn L. Parker Professor of Geotechnical Engineering, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Kansas, 1530 W. 15th St., Lawrence, KS 66045-7609 (corresponding author). ORCID: .