1. Associate Professor, Dept. of Civil Engineering, VIT Univ., Chennai, India; 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. Professor, Univ. of Joseph-Fourier, F-38041 Grenoble, Cedex 09, France.