1. Ph.D. Student, Dept. of Civil and Natural Resources Engineering, Univ. of Canterbury, Christchurch 8140, New Zealand (corresponding author).
2. Associate Professor, Dept. of Civil and Natural Resources Engineering, Univ. of Canterbury, Christchurch 8140, New Zealand.
3. Distinguished Professor, Dept. of Mechanical Engineering, Univ. of Canterbury, Christchurch 8140, New Zealand.
4. Lecturer, Dept. of Mechanical Engineering, Univ. of Canterbury, Christchurch 8140, New Zealand.
5. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Auckland, Auckland 1010, New Zealand.