1. Professor, Dept. of Civil Engineering, Faculty of Engineering, Univ. of Wollongong, Wollongong City, NSW 2522, Australia.
2. Ph.D. Candidate, Faculty of Engineering, Univ. of Wollongong, Wollongong City, NSW 2522, Australia.
3. Lecturer, Civil Engineering Division, Faculty of Engineering, Univ. of Wollongong, Wollongong City, NSW 2522, Australia.