1. Computational Mechanics Laboratory, School of Pedagogical and Technological Education, Heraklion, 14121 Athens, Greece
2. Department of Civil, Environmental, Aerospace and Materials Engineering (DICAM), University of Palermo, Viale delle Scienze, 90128 Palermo, Italy
3. Department of Civil Engineering, Piraeus University of Applied Sciences, 250 Thivon and Petrou Ralli Street, Aigaleo, 122 44 Athens, Greece
4. Department of Civil Engineering, Technological Educational Institute of Western Greece, 26334 Patra, Greece