Local buckling of cold-formed elements used in arched building with geometrical imperfections

• this paper describes the local buckling investigation of doubly corrugated panels,
• such panels are used to construct self supported arch buildings and roofs,
• analytical, numerical and experimental results are compared,
• conclusions are made which can be useful for design purposes.

This paper describes the influence of surface transverse geometric imperfections called corrugations on the local stability of cold-formed elements. Such elements are used to construct self-supported arch buildings and roofs. The authors of the paper compare the results obtained from analytical investigation based on Eurocode 3 formulas, from linear and nonlinear numerical stability analyses and experimental investigation. Two types of thin-walled elements are considered: a panel with smooth walls and panels with corrugations on their surfaces. Finally the conclusions are made which can be useful for design purposes.