1. Ph.D. Student, Dept. of Civil Engineering, Indian Institute of Technology, Guwahati, Assam 781039, India.
2. Professor, Dept. of Civil Engineering, Indian Institute of Technology, Guwahati, Assam 781039, India (corresponding author).
3. Professor, Dept. of Civil Engineering, Indian Institute of Technology, Guwahati, Assam 781039, India.