1. Dept. of Architecture, Section Materials and Structures, Univ. of Florence, Piazza Brunelleschi 6, 50121 Florence, Italy.
2. Full Professor, Dept. of Architecture, Section Materials and Structures, Univ. of Florence, Piazza Brunelleschi 6, 50121 Florence, Italy.
3. Full Professor, Dept. of Civil and Mechanical Engineering, Univ. of Cassino and Southern Lazio, via G. Di Biasio 43, 03043 Cassino, Frosinone, Italy.
4. Assistant Professor, Dept. of Architecture, Section Materials and Structures, Univ. of Florence, Piazza Brunelleschi 6, 50121 Florence, Italy (corresponding author).