Numerical investigation of the cold-formed I-beams bending strength with different web shapes

Cold-formed steel (CFS) structural members retain their positions in the lightweight construction industry. This is due to the significant advantages of CFS. The optimization of these CFS elements will allow the construction of economical buildings with increased load capacities and solutions for stable and economical construction will be obtained. The main aim of this research was to evaluate the effectiveness of these new CFS sections with the estimation of remarkable instabilities and failure modes. This article deals with an experimental study on the behavior of CFS beams of open delta and bi-delta form stressed by four-point bending loads. These cross section shapes are often used in floors as main and secondary beams. The section properties are based on the effective width method designated by the Eurocode 3 standard. A nonlinear finite element (FE) analysis using the ABAQUS program is performed and the comparison between the experimental, numerical and theoretical results is done. Finally, the results showed above all that the breaking loads of the delta and bi-delta beams corresponded to the modes of local buckling and crushing of the web.

Section: Theoretical Methodsmentioning

confidence: 99%

Section: Finite Element Modellingmentioning

confidence: 99%

Flexural behavior of delta and bi-delta cold-formed steel beams: experimental investigation and numerical analysis

Hadidane

Kouider

Benzerara

2022

“…The concrete filled tubes are subjected to axial compressive loading which leads to a dominant compressive deformation in the concrete core without rotation. Therefore a three-dimensional 8-node solid element would be the most appropriate type of element to use to reflect the deformation characteristics of the concrete [5][6][7]23]. Each component was modelled as an independent part ,the steel tube and the concrete were modelled using the 8-node reduced integration linear brick element "C3D8R" available in the ABAQUS library [23] (Fig.…”

Section: Finite Element Modellingmentioning

confidence: 99%

“…Since then, several experimental and analytical studies have been conducted around the world. In the last decades [5][6][7], the finite element (FE) technique has become a more and more popular technique for modelling CFST columns due to the availability of commercially available software such as ABAQUS and ANSYS. FE analysis allows direct modelling of composite action between steel and concrete components, and various factors, such as local and global imperfections and boundary conditions, can be considered more accurately; also all these investigations have resulted in the development of different regulations related to different countries such as Australia, China, Japan, USA (ACI) and European countries (Eurocode4) [8][9][10][11].Although this type of columns may be suitable for high-rise buildings in high seismic regions, their use has been limited due to a lack of information on the true strength and nonlinear behavior of the elements composing them, namely the steel tube and the concrete that it is in-filled.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of the plasticity effect on the behavior of short steel columns filled with concrete loaded axially

Chaouche

Kouider

Djeghaba

et al. 2022

For more than two decades, the construction technique using concrete filled steel tube (CFST) has been widespread throughout the world. Indeed, it has been demonstrated that the use of normal or high strength concrete, confined in a steel tube of circular shape can considerably improve its ductility as well as its load capacity, owing to the combination of the qualities of the two constituent materials; these tubes have an effortless execution, indeed, the concrete used in the CFST does not require formwork nor reinforcement, a durability of the two materials as well as a good behavior to fire, which was the effect desired at the origin of their elaboration. In this paper, we study the axial compression behavior of short circular steel tubes filled with concrete; their modelling will be performed using the ABAQUS/Standard calculation program. In order to accurately determine their behavior, we have created different models. Indeed, these tubes will be modeled in order to simulate different plastic state behaviours, namely a perfect elasto-plastic state, an elasto-plastic state with multilinear strain hardening and a third elasto-plastic behavior with strain hardening proposed by Tao et al. The tested columns consist of circular hollow sections which are designated in the literature as Concrete Filled Steel Tube (CFST), for which we vary the diameters, heights as well as the wall thicknesses, and which we fill with concrete of different qualities. The compressive behavior, including ultimate loads, confinement, load-deflection relationship and failure modes, was obtained from numerical models and compared with experimental and theoretical results based on Eurocode 4. All these results showed a good agreement and a satisfactory correlation, allowing us to assume that a correct modelling can be sufficient to simulate the behavior of CFST.

“…6), a compromise must be established between the load and the dimensions of the elements, in order to limit the deformations of the sidewalls of the chord and to have a ratio β according to the standards of design [12]. NUMERICAL ANALYSIS numerical analysis using the commercial software ABAQUS was carried out in order to validate the experimental study [13][14][15]. The beam was created in 3D (Fig.…”

Section: Deformation Of the Chord Sidewallsmentioning

confidence: 99%

Experimental and numerical investigation of gap K-joints of rectangular hollow section trusses

Slimani

Benzerara

Saïdani

2022

This paper is concerned with investigating of the plastic behaviour on gap K-joints of truss girders, made from thin-walled rectangular hollow section members. An experimental study was carried out on a full-scale girder under a concentrated load on two central nodes. A numerical analysis was carried out using ABAQUS in order to clearly see the behaviour of this type of joint and to make a comparison with the experimentation. This study will make it possible to examine attentively and to define the analytical model for this type of joint. The results obtained in this paper have shown that the sections with very thin-walled present different behaviours compared to the thin or more or less thick sections. As a result, the tested truss made it possible to observe the failure mode of this type of section, follow-up of a comparative study on the determination of the joint capacity by Eurocode 3 and CIDECT.