1. Formerly, Research Scholar, Dept. of Civil Engineering, Indian Institute of Technology, Roorkee, Roorkee 247667, India. E-mail: saif_said123@yahoo.com
2. Professor, Dept. of Civil Engineering, Indian Institute of Technology, Roorkee, Roorkee 247667, India. E-mail: umeshfce@iitr.ernet.in
3. Associate Professor, Dept. of Civil Engineering, Indian Institute of Technology, Roorkee, Roorkee 247667, India. E-mail: manojfce@iitr.ernet.in