1. Associate Professor, Civil and Environmental Engineering Dept., Addis Ababa Institute of Technology, Addis Ababa Univ., P. O. Box 385, Addis Ababa, Ethiopia (corresponding author).
2. Graduate Student, Civil and Environmental Engineering Dept., Addis Ababa Institute of Technology, Addis Ababa Univ., P. O. Box 385, Addis Ababa, Ethiopia. ORCID: .