1. School of Civil Engineering, NTU Athens , Athens 15780, Greece
2. Department of Mechanical Engineering, University of Thessaly , Volos 38334, Greece
3. School of Naval Architecture and Marine Engineering, NTU Athens , Athens 15780, Greece ; , Volos 38334, Greece
4. Department of Mechanical Engineering, University of Thessaly , Athens 15780, Greece ; , Volos 38334, Greece
5. Department of Civil Engineering, University of Patras , Patras 26500, Greece