1. Associate Professor, Centre for Infrastructure Engineering and Safety, School of Civil and Environmental Engineering, Univ. of New South Wales, Sydney 2052, Australia (corresponding author).
2. Emeritus Professor, Centre for Infrastructure Engineering and Safety, School of Civil and Environmental Engineering, Univ. of New South Wales, Sydney 2052, Australia.
3. Centre for Advance Structural Engineering, Univ. of Sydney, Sydney 2008, Australia.