1. Geotechnical Engineer, Advanced Geomechanics, 4 Leura St, Nedlands, Western Australia 6009; formerly, Ph.D. Student, Univ. of Western Australia. E-mail: shinfunc@ag.com.au
2. ARC Federation Fellow, Centre for Offshore Foundation Systems, Univ. of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009 (corresponding author). E-mail: randolph@civil.uwa.edu.au
3. Ph.D. Student, School of Civil and Resource Engineering, Univ. of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009. E-mail: schneider@civil.uwa.edu.au