1. External faculty member, Dept. of Civil Engineering, Univ. of Kerbala, Karbala 56001, Iraq (corresponding author).
2. Assistant Professor, Dept. of Civil Engineering, Univ. of Kerbala, Karbala 56001, Iraq.
3. Professor, Dept. of Civil Engineering, Univ. of Babylon, Bablyon 51002, Iraq.