1. Ph.D. Research Scholar, School of Civil and Environmental Engineering, Nanyang Technological Univ., Block N1, B4B-06, Nanyang Ave., Singapore 639798, Singapore.
2. Professor and Head of Division, School of Civil and Environmental Engineering, Nanyang Technological Univ., Block N1, #1B-36, Nanyang Ave., Singapore 639798, Singapore (corresponding author).
3. Associate Professor, School of Civil and Environmental Engineering, Nanyang Technological Univ., Block N1, #1C-80, Nanyang Ave., Singapore 639798, Singapore.