1. Researcher, Division of Structural and Construction Engineering, Luleå Univ. of Technology, SE-971 87 Luleå, Sweden (corresponding author).
2. Professor, Division of Innovation and Design, Luleå Univ. of Technology, SE-971 87 Luleå, Sweden.
3. Professor, Division of Structural and Construction Engineering, Luleå Univ. of Technology, SE-971 87 Luleå, Sweden.
4. Bridge Specialist, Swedish Transport Administration, Sundsbacken 2, SE-971 25 Luleå, Sweden.