1. Ph.D. Candidate, Centre for Offshore Foundation Systems (M053) and ARC Centre of Excellence for Geotechnical Science and Engineering, Univ. of Western Australia, Crawley, Perth, WA 6009, Australia.
2. Professor, Centre for Offshore Foundation Systems (M053) and ARC Centre of Excellence for Geotechnical Science and Engineering, Univ. of Western Australia, 35 Stirling Hwy., Crawley, Perth, WA 6009, Australia (corresponding author).
3. University Lecturer, Dept. of Engineering Science, Univ. of Oxford, Oxford OX1 3PJ, U.K.