1. Professor, Dept. of Civil Engineering, King Saud Univ., Riyadh 11421, Saudi Arabia (corresponding author).
2. Assistant Professor, Dept. of Civil Engineering, King Saud Univ., Riyadh 11421, Saudi Arabia.
3. Professor, Dept. of Civil Engineering, King Saud Univ., Riyadh 11421, Saudi Arabia.
4. Research Assistant, Dept. of Civil Engineering, King Saud Univ., Riyadh 11421, Saudi Arabia.