1. Department of Strength of Materials and Structural Engineering, Universitat Politècnica de Catalunya, Campus Diagonal Besós, Barcelona East School of Engineering, Barcelona, Spain
2. CINTECX, GeoTECH research group, Universidade de Vigo, Vigo, Spain
3. Department of Transportation, National Laboratory for Civil Engineering LNEC, Lisbon, Portugal
4. Department of Civil Engineering, NOVA School of Science and Technology, Caparica, Portugal