Abstract
The optimisation of the design method for verification of slender steel beam-columns is still a current issue not only from scientific point of view, but also for design practice. Therefore, the main objective of this paper is comparison of the suitability of established design approaches, according to the European standards for steel and aluminium structures, on the basis of numerical simulations. Thus, a finite element model was validated on the basis of experimental analysis available in the scientific literature. To perform the comparison of accuracy of design approaches according to European standards, a commercial software program ANSYS was used for observation of the resistances of beam-columns. The resistance of european I beams with parallel flanges (IPE) and a rectangular hollow cross-section (RHS) were investigated for four load cases on a simply supported member and also on a pinned-fixed beam column with linear bending moment distribution, where the resistance of the cross-section governs. Finally, the conclusions for suitability of the respective design approaches are discussed, together with some findings that arose from this work.
Highlights
Introduction to Methods by European StandardsThe high strength properties of steel are one of the greatest advantages of constructional steel compared to the other materials used in civil engineering, and allows us to design lighter, slender and, more economical structures
The aim of this paper is to reduce this gap, compare the accuracy of the two design methods by geometrically and materially nonlinear analysis with imperfections (GMNIA), summarize the benefits and disadvantages of the unified design method of Eurocode 9, and assess the possibility of application of this design method for steel structures
The comparison of design methods according to European standards for steel beamThe comparison of design methods according to European standards for steel beamcolumns with I beams with parallel flanges (IPE) and rectangular hollow cross-section (RHS) types of cross-sections is presented in the previous sections
Summary
Introduction to Methods by European StandardsThe high strength properties of steel are one of the greatest advantages of constructional steel compared to the other materials used in civil engineering, and allows us to design lighter, slender and, more economical structures. The resistance of steel members subjected to a combination of axial compressive forces and bending moments, the so-called beam columns, is affected by stability problems, which occur with increasing slenderness of structural elements. The equivalent column method was adopted in European standards for design of steel members subjected to an axial compressive force and bending moment about either or both principal axes of cross-section, as summarised in papers [2,3,4]. This design approach is simple and general for a wide range of applicability. A huge amount of effort is still dedicated by researchers to either optimise or replace this design procedure, which recently resulted in the development of several alternative design approaches
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