1. Ph.D. Candidate, School of Civil, Environmental and Mining Engineering, Univ. of Western Australia, Perth 6009, Australia.
2. Professor, School of Civil, Environmental and Mining Engineering, Univ. of Western Australia, Perth 6009, Australia.
3. Ph.D. Candidate, School of Civil, Environmental and Mining Engineering, Univ. of Western Australia, Perth 6009, Australia (corresponding author).