1. Assistant Professor of Structural Engineering, Dept. of Structural Analysis and Design, Univ. of Naples Federico II, P.O. Box 1-80125, Naples, Italy (corresponding author).
2. Research Engineer, Dept. S.A.V.A., Univ. of Molise, Italy.
3. Associate Professor of Structural Engineering, Dept. S.A.V.A., Univ. of Molise, P.O. Box 86100, Campobasso, Italy.
4. Full Professor of Structural Engineering, Dept. of Structural Analysis and Design, Univ. of Naples Federico II, P.O. Box 1-80125, Naples, Italy.
5. Research Engineer, Saint Gobain Technical Fabrics, Northborough, MA.