1. Professor and Director, Protective Technology Research Center, School of Civil and Environmental Engineering, Nanyang Technological Univ., Nanyang Ave., 639798 Singapore (corresponding author). E-mail: cpan@ntu.edu.sg
2. Project Officer, Protective Technology Research Center, School of Civil and Environmental Engineering, Nanyang Technological Univ., Nanyang Ave., 639798 Singapore.
3. Research Fellow, Protective Technology Research Center, School of Civil and Environmental Engineering, Nanyang Technological Univ., Nanyang Ave., 639798 Singapore.