1. Department of Structures for Engineering and Architecture, DIST – University of Naples “Federico II”, Napoli, Italy
2. Department of Civil Engineering and Computer Science Engineering, DICII – University of Rome “Tor Vergata”, Roma, Italy
3. CNR-IREA Istituto per il Rilevamento Elettromagnetico dell’Ambiente, Consiglio Nazionale delle Ricerche, Napoli, Italy