1. Assistant Professor, Dept. of Civil Engineering, National Univ. of Singapore, Block E1A, No. 07-03, 1 Engineering Drive 2, Singapore 117576, Singapore (corresponding author).
2. Lecturer, Dept. of Civil, Structural and Environmental Engineering, Trinity College, Dublin, Ireland.
3. Associate Professor, Dept. of Civil, Structural and Environmental Engineering, Trinity College, Dublin, Ireland.
4. Chair, Professor, Dept. of Civil, Structural and Environmental Engineering, Trinity College, Dublin, Ireland.