1. Professor, Dept. of Constructions and Mathematical Methods in Architecture, Univ. of Naples “Federico II,” Via Monteoliveto, 80134 Napoli, Italy (corresponding author).
2. Engineer; formerly, Ph.D. Student, Dept. of Structural Analysis and Design, Univ. of Naples “Federico II,” P. le Tecchio 80, 80125 Napoli, Italy.
3. Assistant Professor, Dept. of Structural Analysis and Design, Univ. of Naples “Federico II,” P. le Tecchio 80, 80125 Napoli, Italy.