1. Research Associate, Dept. of Structural Building and Geotechnical Engineering, Politecnico di Torino, corso Duca degli Abruzzi 24, 10129 Torino, Italy (corresponding author).
2. Ph.D. Student, Dept. of Structural Building and Geotechnical Engineering, Politecnico di Torino, corso Duca degli Abruzzi 24, 10129 Torino, Italy.
3. Assistant Professor, Department of Civil Engineering, Univ. of Toronto, Toronto, ON.