1. Associate Professor, Dept. of Civil Engineering, King Saud Univ., Riyadh 11421, Saudi Arabia.
2. Associate Professor, Dept. of Civil Engineering, King Saud Univ., Riyadh 11421, Saudi Arabia (corresponding author).
3. M.Sc. Student, Dept. of Civil Engineering, King Saud Univ., Riyadh 11421, Saudi Arabia.
4. Professor, Dept. of Civil Engineering, King Saud Univ., Riyadh 11421, Saudi Arabia.