1. Department of Structures for Engineering and Architecture; University of Naples ‘Federico II’; Via Claudio 21 I-80125 Naples Italy
2. CNR-SPIN and Department of Physics ‘E. Pancini’; University of Naples ‘Federico II’; P.le V. Tecchio 80 I-80125 Naples Italy
3. Department of Civil, Architectural and Environmental Engineering; University of Naples ‘Federico II’; Via Claudio 21 I-80125 Naples Italy
4. Department of Chemical, Materials and Production Engineering (DICMaPI); University of Naples ‘Federico II’; P.le V. Tecchio 80 I-80125 Naples Italy