1. Professor, Division of Structural Engineering, Luleå Univ. of Technology, 971 87 Luleå, Sweden; and, Division of Structural Engineering, Technical Univ. of Denmark, DTU-Building 116, Brovej, DK-2800 Kgs. Lyngby, Denmark. E-mail: bt@byg.dtu.dk
2. MSc, Ph.D. Student, Division of Structural Engineering, Luleå Univ. of Technology, 971 87 Luleå, Sweden. E-mail: thomas.blanksvard@ltu.se