1. Professor, Structural Concrete Research Group, Dept. of Continuum Mechanics and Structures, Escuela Técnica Superior de Ingenieros (ETSI) de Caminos, Canales y Puertos, Polytechnic Univ. of Madrid, 28040 Madrid, Spain (corresponding author).
2. Structural Engineer, IDOM, S.A. Av. Monasterio de el Escorial 4, 28049 Madrid, Spain.
3. Structural Engineer, FHECOR Consulting Engineers, Barquillo 23, 28004 Madrid, Spain.
4. Associate Professor, Structural Concrete Research Group, Dept. of Continuum Mechanics and Structures, Escuela Técnica Superior de Ingenieros (ETSI) de Caminos, Canales y Puertos, Polytechnic Univ. of Madrid, 28040 Madrid, Spain.
5. Ph.D. Student, Structural Concrete Research Group, Dept. of Continuum Mechanics and Structures, Escuela Técnica Superior de Ingenieros (ETSI) de Caminos, Canales y Puertos, Polytechnic Univ. of Madrid, 28040 Madrid, Spain.