1. Assistant Professor, Dept. of Civil Engineering, Helwan Univ., Cairo, Egypt (corresponding author).
2. Associate Professor, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., Raleigh, NC.
3. Assistant Professor, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., Raleigh, NC.
4. Associate Professor, Dept. of Civil Engineering, Univ. of Hong Kong, Hong Kong, China.