1. Ph.D. Candidate, School of Civil and Environmental Engineering, Univ. of New South Wales, Sydney, NSW 2052, Australia (corresponding author).
2. Ph.D. Candidate, School of Civil and Environmental Engineering, Univ. of New South Wales, Sydney, NSW 2052, Australia.
3. Associate Professor, Dept. of Civil Engineering, Universidad Tecnica FSM, Valparaiso 1680, Chile.