1. Postgraduate Student, Dept. of Civil Engineering, Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham, Amrita Univ., Tamil Nadu 641112, India.
2. Professor, Dept. of Civil Engineering, Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham, Amrita Univ., Tamil Nadu 641112, India (corresponding author).