ABSTRACT
The paper describes the results of experimental studies and numerical analyses based on FEM modelling devoted to bolted connections of angle sections subjected to tension, carried out in a few research centres in Poland in recent years. Steel angle sections are used in buildings, bridges, and for reinforcing existing structures. They are also applied to lattice telecommunication towers and masts, and supports for overhead electrical lines. The most common method of joining angle sections involves connecting an angle by one leg, which generates tension and additional bending in the angle section due to the eccentricity of the bolt group. Reduction in cross-sectional area and the effect of eccentricity lead to an uneven stress distribution within the connected angles, resulting in various failure modes dependent on the material and geometrical parameters of the sections and bolts. The experimental and FEM results are discussed providing some remarks regarding the standard design methods.
