1. Professor, Dept. I.I.A.R., Politecnico di Milano, Piazza Leonardo da Vinci, 32, 20133 Milano, Italy.
2. Assistant Professor, Dept. I.I.A.R., Politecnico di Milano, Piazza Leonardo da Vinci, 32, 20133 Milano, Italy.
3. Chair Professor, Dept. of Civil Engineering, Indian Institute of Technology, Kharagpur 721302, West Bengal, India.