INFLUENCE OF GEOMETRICAL AND STRUCTURAL IMERFECTIONS OF STEEL PLATE GIRDERS

Abstract

The girders or parts of the girders are not ideally flat in terms of their geometry. The deviations that occur are defined as geometric imperfections. Also, in the material from which the girder is made, a certain deviation may occur during factory production or for some other reason, which is known as structural imperfection. We will introduce the case of a plate girders (welded steel I girders), with and without stiffening and loaded with patch loading. The results were obtained by numerical simulation in the ANSYS for models with included geometric imperfections. The model was performed in accordance with the recommendations for different behavior curves of materials from Eurocode 3. The limit load obtained by numerical simulation corresponded to the experimental results from the literature. Stress values for girders with and without geometric imperfections for the same load value were compared.

Keywords

• geometric imperfections
• structural imperfection
• plate girder
• steel girder