1. Research Associate, School of Civil and Resource Engineering, The Univ. of Western Australia, 35 Stirling Hwy., Crawley, Western Australia 6009, Australia (corresponding author).
2. Winthrop Professor, School of Civil and Resource Engineering, The Univ. of Western Australia, 35 Stirling Hwy., Crawley, Western Australia 6009, Australia.
3. Research Assistant Professor, School of Civil and Resource Engineering, The Univ. of Western Australia, 35 Stirling Hwy., Crawley, Western Australia 6009, Australia.