1. Professor, Dept. of Building and Real Estate, Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong.
2. Professor and Head of Civil Engineering, Curtin Univ. of Technology, GPO Box U1987, Perth, WA 6845, Australia.
3. Research Student, Dept. of Building and Real Estate, Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong.