1. BG Consulting Engineers, Avenue de Cour 61, CP 241, 1001, Lausanne, Switzerland (corresponding author).
2. School of Civil and Environmental Engineering, Nanyang Technological Univ., 50, Nanyang Ave., Singapore 639798.
3. EPFL, Swiss Federal Institute of Technology of Lausanne, ICOM—Steel Structures Laboratory, School of Architecture, Civil and Environmental Engineering, 1015 Lausanne, Switzerland.