1. Professor, School of Civil, Mining and Environmental Engineering, Univ. of Wollongong, Wollongong City, NSW 2522, Australia (corresponding author).
2. Ph.D. Candidate, School of Civil, Mining and Environmental Engineering, Univ. of Wollongong, Wollongong City, NSW 2522, Australia.
3. Senior Lecturer, School of Civil, Mining and Environmental Engineering, Univ. of Wollongong, Wollongong City, NSW 2522, Australia.