1. Professor, Construction Engineering Dept., Civil Engineering School, Universitat Politècnica de Catalunya, Jordi Girona 1–3, C-1 201, 08034 Barcelona, Spain.
2. Assistant Professor, Construction Engineering Dept., Civil Engineering School, Universitat Politècnica de Catalunya, Jordi Girona 1–3, C-1 201, 08034 Barcelona, Spain (corresponding author).
3. Assistant Professor, Construction Engineering Dept., Civil Engineering School, Universitat Politècnica de Catalunya, Jordi Girona 1–3, C-1 201, 08034 Barcelona, Spain.