1. Associate Professor, Dept. of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India (corresponding author).
2. Postgraduate Student, Dept. of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
3. Postgraduate Student, Dept. of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139-4307; formerly, Undergraduate Student, Dept. of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
4. Professor, Dept. of Civil and Mining Engineering, Univ. of Wollongong, North-field Ave., Wollongong, New South Wales, Australia 2522.