[1] Empa, Swiss Fed Labs Mat Sci & Technol, Struct Engn Res Lab, CH-8600 Dubendorf, Switzerland
[2] Lund Univ, Fac Engn LTH, Div Struct Mech, SE-22100 Lund, Sweden
[3] Univ Zagreb, Fac Civil Engn, Dept Struct, Zagreb 10000, Croatia
[4] Queens Univ, Civil Engn Res Ctr, Belfast BT9 5AG, Antrim, North Ireland