1. Doctoral student, Department of Civil Engineering, Indian Institute of Technology, IIT Delhi, Hauz Khas, New Delhi 110016, India, Telephone: +91 99 68475156, Telefax: +91–11–26581117, E-mail: kausarali786@rediffmail.com
2. Associate Professor, Department of Civil Engineering, Indian Institute of Technology, IIT Delhi, Hauz Khas, New Delhi 110016, India, Telephone: +91 11 26591577, Telefax: +91 11 26581117, E-mail: shahu@civil.iitd.ac.in
3. Professor, Department of Civil Engineering, Indian Institute of Technology, IIT Delhi, Hauz Khas, NewDelhi 110016, India, Telephone: +91 11 26591190; Telefax: +91 11 26581117, E-mail: kgsharma@civil.iitd.ac.in