Plastic Mechanisms for Thin-Walled Cold-Formed Steel Members in Eccentric Compression

Ungureanu, Viorel; Kotełko, Maria; Grudziecki, Jan

doi:10.1515/ama-2016-0006

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…Ungureanu et al in their paper [15] described the possibility of using local plastic mechanisms to characterise the ultimate strength of short thin-walled cold-formed steel members subjected to eccentric compression about the minor axis. Similar themes related to the machism of plastic destruction of short columns are described in the paper [16]. This paper presents thin-walled channel columns with a modified crosssectional shape that are subjected to compressive loading.…”

Section: Introductionmentioning

confidence: 79%

Analysis of Strength and Resistance to Loss of Stability of Thin‐Walled Channel Columns with Non‐Standard Cross‐Sectional Shape

Pawlak,

Paczos

2024

Preprint

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Experimental tests and numerical analyses were carried out on short, thin-walled channel columns with modified cross-sectional shape. The columns were loaded with an axial compressive force applied at the center of gravity of the cross section. Tests were carried out on a universal testing machine, while numerical analyses were performed in ANSYS software. The purpose of the tests was to determine the values of critical forces for the compressed columns and to determine the values of maximum forces at which failure of the columns occurs. Critical forces were determined based on the strain-averaged method. Based on the study, it was found that the strength and resistance to loss of stability of columns is primarily affected by their stiffness, and therefore by the shape of the cross-sections. In addition, for short columns, it seems more important to determine the value of maximum forces than the values of critical forces.

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Section: Introductionmentioning

confidence: 79%

Analysis of Strength and Resistance to Loss of Stability of Thin‐Walled Channel Columns with Non‐Standard Cross‐Sectional Shape

Pawlak,

Paczos

2024

Preprint

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“…The authors, in two accompanying articles [12,13], developed analytical formulations for plastic collapse mechanisms to characterise the ultimate strength of lipped channel short members subjected to eccentric compression about the minor axis. Based on both experimental observations and numerical results, five plastic mechanism models (see Tab.…”

Section: Failure Mechanisms -Eccentricity About Minor Axismentioning

confidence: 99%

Failure mechanisms of TWCFS members considering various eccentricities

et al. 2023

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Thin-walled cold-formed steel elements represent an attractive structural solution due to the fast manufacturing and erection time on-site. Their small thickness leads to imperfection and sensitivities to eccentricities. An experimental programme was performed on short members with lipped channel cross section, subjected to eccentric compression about the minor and major axes, in a large range of eccentricities. The specimens were manufactured on a folding machine. Before testing, the dimensions of all specimens were measured. Shortening of all specimens was measured in two ways, i.e., 1) using the displacement gauge integrated with the machine crosshead beam and 2) from deformation fields obtained using digital image correlation (DIC) system. The quantitative results, presented as the ultimate loads versus the eccentricity curve, emphasise the influence of the eccentric load on the capacity of the element. Finite element (FE) analyses were performed to simulate the behaviour of short members in eccentric compression using the commercial FE software ABAQUS/CAE and ANSYS. Static non-linear analyses were conducted in displacement control. Both geometrical and material nonlinearities were included. An isotropic linearly elastic-perfectly plastic constitutive model was considered, with von Mises yielding the criterion and associated flow rule. Failure modes were identified due to numerical and experimental tests. Plastic mechanism models were derived, resulting in the derivation of post-ultimate, rigid-plastic curves, characterising a post-ultimate structural behaviour.

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“…The objectives of the study were the determination of the ultimate loads and the plastic mechanisms of failure, as well as the validation and calibration of the FE models. The authors, in an accompanying paper [9] developed analytical formulations for collapse plastic mechanisms to characterise the ultimate strength of short lipped channel members subjected to eccentric compression about the minor axis.…”

Section: Stubs In Eccentric Compression About the Minor Axismentioning

confidence: 99%

The Influence of Eccentricity on the Behaviour of Thin‐Walled Cold‐Formed Steel Members with Open Cross‐Sections under Compression

et al. 2022

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Thin‐walled cold‐formed steel elements represent an attractive structural solution due to the fast manufacturing and erection time on site. Their small thickness leads to imperfection and eccentricities sensitivities. An experimental program was performed on short members with lipped channel cross‐section of 150×60×20×2 mm, subjected to (1) eccentric compression about the minor axis, in a range of eccentricities between −40 mm and +40 mm and (2) eccentric compression about the major axis, in a range of eccentricities between 0 mm and +90 mm. Shortening of all specimens was measured in two ways, i.e. (1) using the displacement gauge integrated with the machine crosshead beam and (2) from deformation fields obtained using Digital Image Correlation system (DIC). The quantitative results, presented as ultimate loads vs eccentricity curve, emphasize the influence of the eccentric load on the capacity of the element and on the type of plastic mechanism formation. Finite element analyses were performed to simulate the behaviour of short members in eccentric compression using the commercial FE software ABAQUS/CAE. Static non‐linear analyses were carried out in displacement control. Both geometrical and material non‐linearities were included. The experimental results confirm two different basic failure mechanisms depending on the load eccentricity direction applied to the studied members with open cross‐section.

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Plastic Mechanisms for Thin-Walled Cold-Formed Steel Members in Eccentric Compression

Cited by 6 publications

References 10 publications

Analysis of Strength and Resistance to Loss of Stability of Thin‐Walled Channel Columns with Non‐Standard Cross‐Sectional Shape

Analysis of Strength and Resistance to Loss of Stability of Thin‐Walled Channel Columns with Non‐Standard Cross‐Sectional Shape

Failure mechanisms of TWCFS members considering various eccentricities

The Influence of Eccentricity on the Behaviour of Thin‐Walled Cold‐Formed Steel Members with Open Cross‐Sections under Compression

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