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