1. Research Fellow, Department of Civil Engineering, Monash Univ. 3800, AU, e-mail: Benjamin.Shannon@monash.edu
2. Professor, Department of Civil Engineering, Monash Univ. 3800, AU (Corresponding author), e-mail: Jayantha.Kodikara@monash.edu
3. Senior Lecturer, Department of Civil and Construction Engineering, Faculty of Science, Engineering & Technology, Swinburne Univ. of Technology, Hawthorn, Victoria 3122, AU, e-mail: prajeev@swin.edu.au