1. Associate Professor, Centre for Offshore Foundation Systems, Univ. of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia (corresponding author).
2. Graduate Engineer, Subsea 7, 460 Alexandra Rd., Singapore 119963; formerly, Research Student, Centre for Offshore Foundation Systems, Univ. of Western Australia, Crawley, WA 6009, Australia.