1. Postdoctoral Researcher, Division of Structural Engineering, Luleå Univ. of Technology, SE-971 87 Luleå, Sweden.
2. Researcher, Division of Structural Engineering, Luleå Univ. of Technology, SE-971 87 Luleå, Sweden.
3. Researcher, NORUT, NO 8517 Narvik, Norway.
4. Assistant Professor, Division of Structural Engineering, Luleå Univ. of Technology, SE-971 87 Luleå, Sweden.
5. Associate Professor, Division of Structural Engineering, Luleå Univ. of Technology, SE-971 87 Luleå, Sweden.
6. Professor, Division of Structural Engineering, Luleå Univ. of Technology, SE-971 87 Luleå, Sweden.
7. Bridge Engineer, Trafikverket, SE 97 125 Luleå, Sweden.
8. Senior Infrastructure Engineer, Trafikverket, SE 78 189 Borlänge, Sweden.
9. Emeritus Professor, Division of Structural Engineering, Luleå Univ. of Technology, SE-971 87 Luleå, Sweden (corresponding author).