1. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, National Univ. of Singapore, Block E1A, #07-03, 1 Engineering Dr. 2, Singapore 117576, Singapore.
2. Lecturer, Engineering Design and Innovation Centre, National Univ. of Singapore, Block E1A, #03-03, 1 Engineering Dr. 2, Singapore 117576, Singapore.
3. Assistant Professor, Dept. of Civil and Environmental Engineering, National Univ. of Singapore, Block E1A, #07-03, 1 Engineering Dr. 2, Singapore 117576, Singapore (corresponding author).