1. Department of Structural and Mechanical Engineering; Civil Engineering School, University of Cantabria; 39005 Santander Spain
2. Department of Architectural Constructions, Geotechnical and Structural Engineering, Industrial Engineering School; University of Valladolid; 47011 Valladolid Spain
3. Department of Electrical Engineering and Energy, Industrial Engineering School; University of Cantabria; 39005 Santander Spain