1. Member, ASCE
2. Sci., Bridge Div., Central Rd. Res. Inst., P.O. CRRI, New Delhi-110 020, India.
3. Assoc. Prof., Dept. of Civ. and Envir. Engrg., Univ. of Adelaide, South Australia 5005, Australia. E-mail: doehlers@civeng.adelaide.edu.au
4. Prof. of Civ. Engrg., School of Civ. and Envir. Engrg., Univ. of New South Wales, New South Wales 2052, Australia.