Experimental and numerical investigations on built-up cold-formed steel beams using resistance spot welding

Ungureanu, Viorel; Both, Ioan; Burcă, Mircea; Radu, Bogdan; Neagu, Călin; Dubină, Dan

doi:10.1016/j.tws.2021.107456

Cited by 31 publications

(24 citation statements)

References 20 publications

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“…The lateral-torsional bucking in load application points and half of the span has been prevented by constraints of the out-of-plane displacements. The numerical results provide similar failure modes as in the case of the tested beams [4], i.e. shear buckling of the shear panels, shear buckling of the web corrugation, local buckling of the flange in the load application point.…”

Section: Validation Modelsupporting

confidence: 56%

“…The loading of the beam was defined as a vertical displacement in a set of multipoint constraints MPC that forms a leverage system to transmit the deflection to the 2 loading points (4 loading points for the entire span, see Figure 3). The numerical results provide similar failure modes as in the case of the tested beams [4], i.e. shear buckling of the shear panels, shear buckling of the web corrugation, local buckling of the flange in the load application point.…”

Section: Validation Modelsupporting

confidence: 56%

“…All flanges are lipped channels with thickness of 2.5 mm, while thickness of shear plates and corrugated web was 0.8 mm or 1.2 mm, respectively. The 0.8 mm steel sheet is classified as S250GD+Z while the 1.2 mm and the 2.5 mm thicknesses for the shear panels and for the flanges respectively have a yielding characterised by S350GD+Z steel, similarly with the specimens tested in the laboratory [4].…”

Section: Validation Modelmentioning

confidence: 99%

“…high operating speed, no additional consumables, simplicity of operation and automation [2], [3], and equipment' developments, built-up elements decrease the manufacturing process time. The resistance spot welding is a technology highly used in automotive industry and was proven to be suitable also for built-up cold-formed elements, [4]. Nevertheless, cold-formed elements are galvanised elements and the presence of zinc can lead to the weld quality concern [2] which requires more studies on such elements.…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigations on built‐up cold‐formed steel beams for long spans

Ungureanu¹,

Luka•ević

Both

et al. 2021

ce papers

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The material saving obtained by using thin‐walled cold‐formed steel elements is well‐known for small structures as well as for common industrial structures. Additional to the truss type structures, another solution for obtaining light‐weight elements consist of connecting cold‐formed steel profiles as the flange to the corrugated steel sheets as the web. The resistance spot welding connecting technique is an advanced solution which offers reduced manpower and time for element production. These built‐up elements have shown their feasibility and high bearing capacity in previous studies. The present paper highlights additional characteristic responses of cold‐formed steel elements that extend in the response of built‐up corrugated web beams. The parameters considered in the numerical model include the span of the beam, the height of the beam, the thickness of the corrugated web plates, the thickness of the shear panel, the number of resistance spot welds and the orientation of the beam axis. By considering the real case configuration of industrial buildings, pitched roofs require the beams to have an inclination. The analyzed inclined beams exhibited increased capacity due to the redistribution of internal forces, growing the attractiveness of this solution.

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Section: Validation Modelsupporting

confidence: 56%

Section: Validation Modelsupporting

confidence: 56%

Section: Validation Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical investigations on built‐up cold‐formed steel beams for long spans

Ungureanu¹,

Luka•ević

Both

et al. 2021

ce papers

Self Cite

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“…The recorded deformation was taken as a displacement of the transverse beam of the testing equipment. [5] In Figure 7 there are presented the force-deformation diagram for the welded Nimonic 80A sheets with and without the heat treatment. In all cases the fracture took place is in the welded nugget (nucleus) and it is determined by its shear under the tensile-shear force.…”

Section: Figurementioning

confidence: 99%

The Influence of Heat TreatmentS on the Mechanical Properties of Resistance Spot Welded Joints FROM Nimonic 80 A Alloys

Burcă

Mitelea

Burcă

et al. 2021

METAL 2021 Conference Proeedings

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Parametric Finite Element Analyses of Lightweight Cold‐formed Steel‐concrete Composite Floor Beams

et al. 2022

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Composite structural systems have many benefits, such as a high degree of prefabrication, reusability and long span capability. The main advantage of such systems is manifested through the optimal utilisation of structural steel and concrete. Additionally, allowing for demountability and reusability, the system can also result in a much smaller carbon footprint at the end of life. These advantages are particularly emphasised with the implementation of cold‐formed steel sections. This paper presents an innovative solution for a composite floor structure system consisting of built‐up cold‐formed profiles and concrete slabs made with profiled sheets. The influence of the corrugated web thickness, type of connection between steel beam elements, the degree of shear connection and steel beam height on the overall behaviour of the composite system is analysed. The performed FE analyses showed that the influence of connections between steel beam elements and the degree of shear connection had the most significant impact on system behaviour. In contrast, the steel beam height, the corrugated web thickness and spot weld density had less influence on the analysed composite system behaviour. The obtained results provide the basis for implementing laboratory research on the proposed system.

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Experimental and numerical investigations on built-up cold-formed steel beams using resistance spot welding

Cited by 31 publications

References 20 publications

Numerical investigations on built‐up cold‐formed steel beams for long spans

Numerical investigations on built‐up cold‐formed steel beams for long spans

The Influence of Heat TreatmentS on the Mechanical Properties of Resistance Spot Welded Joints FROM Nimonic 80 A Alloys

Parametric Finite Element Analyses of Lightweight Cold‐formed Steel‐concrete Composite Floor Beams

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