1. Ph.D. Candidate, School of Civil, Mining, and Environmental Engineering, Univ. of Wollongong, Wollongong, NSW 2522, Australia; presently, on leave, Assistant Professor, Dept. of Civil Engineering, Univ. of Engineering and Technology, Lahore 54890, Pakistan.
2. Senior Lecturer, School of Civil, Mining, and Environmental Engineering, Univ. of Wollongong, Wollongong, NSW 2522, Australia.
3. Associate Professor, School of Civil, Mining, and Environmental Engineering, Univ. of Wollongong, Wollongong, NSW 2522, Australia (corresponding author).