1. Associate Professor, Dept. of Civil Engineering, College of Engineering and Management, Punnapra, Alappuzha 688003, India; formerly, Senior Lecturer, Faculty of Civil Engineering, Univ. Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia (corresponding author).
2. Professor, Dept. of Civil Engineering, Indian Institute of Technology, Bombay, Mumbai 400076, India.