1. Formerly, Research Scholar, Dept. of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
2. Professor, Dept. of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India (corresponding author).
3. Emeritus Professor, LTHE, Univ. of Joseph-Fourier, F-38041 Grenoble, France.