1. Junior Lecturer, Dept. of Civil Engineering, Mirpur Univ. of Science and Technology, Mirpur, AJK, Pakistan.
2. Assistant Professor, Dept. of Civil Engineering, Univ. of Engineering and Technology, Lahore, Pakistan.
3. Professor, Dept. of Civil and Environmental Engineering, Western Univ., London, ON, Canada N6A 3K7 (corresponding author).
4. Associate Professor, Dept. of Civil Engineering, Univ. of Engineering and Technology, Lahore, Pakistan.