1. Research Associate, Centre for Infrastructure Performance and Reliability, School of Engineering, The Univ. of Newcastle, Callaghan, NSW, Australia (corresponding author).
2. Senior Lecturer, Centre for Infrastructure Performance and Reliability, School of Engineering, The Univ. of Newcastle, Callaghan, NSW, Australia.
3. Associate Professor, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., Raleigh, NC 27695-7533.