1. Ph.D. Student, Dept. of Civil and Natural Resources Engineering, Univ. of Canterbury, Private Bag 8400, Christchurch 8140, New Zealand (corresponding author).
2. Ph.D. Student, Dept. of Civil and Natural Resources Engineering, Univ. of Canterbury, Private Bag 8400, Christchurch 8140, New Zealand.
3. Professor, Dept. of Civil and Natural Resources Engineering, Univ. of Canterbury, Private Bag 8400, Christchurch 8140, New Zealand.
4. Structural Engineer, Building Research Association of New Zealand, Private Bag 50908, Porirua City 5240, New Zealand.
5. Director, UC Quake Centre, Univ. of Canterbury, Private Bag 8400, Christchurch 8140, New Zealand.