1. Dept. of Architecture, Built Environment, and Construction Engineering, Politecnico di Milano, Piazza Leonardo Da Vinci 32, Milan 20133, Italy.
2. Professor, Dept. of Architecture, Built Environment, and Construction Engineering, Politecnico di Milano, Piazza Leonardo Da Vinci 32, Milan 20133, Italy (corresponding author).
3. Fachgebiet Massivbau und Baukonstruktion, Technische Univ. Kaiserslautern, Paul-Ehrlich-Straße 14, Kaiserslautern D-67663, Germany.
4. Professor, Fachgebiet Massivbau und Baukonstruktion, Technische Univ. Kaiserslautern, Paul-Ehrlich-Straße 14, Kaiserslautern D-67663, Germany.