1. Consulting Engineer, Byggnadstekniska Byrån, Stadsgården 10, 11645 Stockholm, Sweden; formerly, Ph.D. Student, Division of Structural Engineering and Bridges, KTH Royal Institute of Technology, Brinellvägen 23, 10044 Stockholm, Sweden (corresponding author).
2. Professor, Division of Structural Engineering and Bridges, KTH Royal Institute of Technology, Brinellvägen 23, 10044 Stockholm, Sweden.