1. Postgraduate Student, School of Engineering, Deakin Univ., Pigdons Rd., Geelong, VIC 3217, Australia.
2. Professor, Centre for Offshore Foundation Systems, Univ. of Western Australia, Perth, WA 6009, Australia.
3. Lecturer, School of Engineering, Deakin Univ., Pigdons Rd., Geelong, VIC 3217, Australia (corresponding author).
4. Professor, Centre for Geotechnical and Materials Modelling, Univ. of Newcastle, Newcastle, NSW 2308, Australia.