1. Research Scholar, Dept. of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India.
2. Contermobility Group, Military Engineering Section, Medicine Hat, AB, Canada T1A 8K6.
3. Associate Professor, Dept. of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India (corresponding author). E-mail: desai@civil.iitb.ac.in
4. Professor, Dept. of Civil Engineering, Univ. of Manitoba, Winnipeg, MB, Canada R3T 5V6.