1. Associate Professor, Dept. of Building and Real Estate, Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong SAR, China (corresponding author). E-mail: bsplam@inet.polyu.edu.hk
2. Associate Professor, Dept. of Civil Engineering, Univ. of Hong Kong, Pokfulam Rd., Hong Kong SAR, China. E-mail: mohan@hkucc.hku.hk
3. Associate Professor, Dept. of Civil Engineering, Univ. of Hong Kong, Pokfulam Rd., Hong Kong SAR, China. E-mail: tstng@hkucc.hku.hk