1. Assistant Professor, Dept. of Structural, Geotechnical and Building Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy (corresponding author).
2. Associate Professor, Dept. of Structural, Geotechnical and Building Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
3. Full Professor, Dept. of Structural, Geotechnical and Building Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
4. Associate Professor, Departamento de Física, Universidade Estadual de Ponta Grossa, Av. General Carlos Cavalcanti 4748, Ponta Grossa, 84030-900 Paraná, Brazil.
5. Full Professor, Departamento de Física, Universidade Estadual de Maringá, Avenida Colombo 5790, Maringá, 87020-900 Paraná, Brazil.