1. Department of Structures for Engineering and Architecture, University of Naples “Federico II”, Piazzale Tecchio 80, 80125 Naples, Italy
2. Department of Structural and Geotechnical Engineering, Sapienza University of Rome, Via Antonio Gramsci 53, 00197 Roma, Italy
3. Department of Engineering, University Niccolò Cusano, Via Don Carlo Gnocchi 3, 00166 Roma, Italy