1. Lecturer, Dept. of Civil Engineering, Bengal Engineering and Science Univ., Shibpur, Howrah-711103, India. E-mail: ashis@civil.becs.ac.in
2. Assistant Professor, Dept. of Civil Engineering, Bengal Engineering and Science Univ., Shibpur, Howrah-711103, India (corresponding author). E-mail: ambarish@civil.becs.ac.in
3. Professor, Dept. of Civil Engineering, Bengal Engineering and Science Univ., Shibpur, Howrah-711103, India. E-mail: amalendu@civil.becs.ac.in