Experiments and finite element modelling of screw pattern of self-drilling screw connections for high strength cold-formed steel

Roy, Krishanu; Lau, Hieng Ho; Ting, Tina Chui Huon; Masood, Rehan; Kumar, Ankur; Lim, James B.P.

doi:10.1016/j.tws.2019.106393

Cited by 57 publications

(19 citation statements)

References 8 publications

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“…Node displacement Uy 1 0.009 Internal force of truss element N 1 0.077 1 Uy is displacement along the y-axis; N is axial force.…”

Section: Item Description Error (%)mentioning

confidence: 99%

“…These approaches have been well developed and programmed by mathematically analyzing the structural components based on the continuum mechanics. Recently, some advanced finite element models have also been proposed and applied to more accurately model structure's behavior, e.g., Roy et al [1][2][3], Uzzaman et al [4] and Chen et al [5]. These results show that the FEM is able to simulate some complex structural behavior, such as the failure modes of self-drilling screw connections for high strength cold-formed steel, the buckling of gapped built-up cold-formed steel channel sections, etc.…”

Section: Introductionmentioning

confidence: 99%

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openVFIFE: An Object-Oriented Structure Analysis Platform Based on Vector Form Intrinsic Finite Element Method

et al. 2021

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The vector form intrinsic finite (VFIFE) method is a new and promising structural analysis technique that has many advantages as compared with the conventional finite element method (FEM) in analyzing the complex behaviors of a structure. However, despite the popularization of its application in civil and infrastructure engineering, there is no available unified general analysis framework for it, which limits the applications and developments of VFIFE. This work develops and implements a platform (termed openVFIFE) based on a new proposed object-oriented framework to facilitate the development and application of the vector form intrinsic finite method as well as the efficient and accurate analyses of complex behaviors for civil structures. To validate the platform, a series of numerical examples are conducted. Furthermore, to extend the applications of VFIFE, the nonlinear dynamic and collapse processes of a transmission tower under earthquake load are studied using openVFIFE. The results of these numerical examples simulated by the developed truss or beam elements are consistent with theoretical solutions, previous research or conventional finite element models. The failure modes of the transmission tower under earthquake load simulated by the platform is consistent with those observed in real cases. In addition, the results of nonlinear dynamic analyses of the transmission tower show that the computational efficiency of the proposed platform is 6-10 times higher than that of the conventional finite element method. The results provide sufficient evidence to prove the accuracy and efficiency of the proposed platform in the static, dynamic and elastoplastic analyses of truss and frame structures, especially in the structure analysis characterized by strong geometry nonlinearity. It is noteworthy that in addition to the link and beam elements, further work is undergoing on implementing more elements, such as shell and solid elements. The openVFIFE also allows researchers who are interested in this topic to put their creative ideas into this platform and continuously improve the completeness and applicability of the VFIFE method.

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“…Node displacement Uy 1 0.009 Internal force of truss element N 1 0.077 1 Uy is displacement along the y-axis; N is axial force.…”

Section: Item Description Error (%)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

openVFIFE: An Object-Oriented Structure Analysis Platform Based on Vector Form Intrinsic Finite Element Method

et al. 2021

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“…Much attention is paid to lattice roof girders made of CFS connected in joints with self-drilling screws [14], self-piercing rivets (SPR) [15] or a novel pin-jointed moment connector, called the Howick Rivet Connector (HRC) presented by Mathieson at al. [16,17].…”

Section: State Of the Artmentioning

confidence: 99%

Analysis of Failure Mechanism in Joints with Positive Eccentricity in CFS Truss

2021

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The paper presents studies concerning the load-bearing capacity of truss joints with a positive eccentricity resulting from the arrangement of geometric members and the failure mechanisms observed in the joints. Based on the previously conducted experimental study, a numerical model of the tested fragment of the CFS truss with eccentricity in the joint was created and validated. All structural details of the tested truss and the loading method consistent with the experiment were taken into account. The results obtained from a uniaxial tensile tests on a steel samples and results estimated during destructive tests carried out on a full-scale of research model were taken into account in validation of the numerical model. Next, appropriate numerical analyses were carried out and parameters such as the eccentricity size in the joint and the wall thickness of sections (t = 1.0, 1.5 and 4.0 mm) were modified. In the range of the studied wall slenderness from λ > 70 (1.0 mm and 1.5 mm thick), it was confirmed that the resistance of truss joints made from CFS open cross-sections with a positive eccentricity, is greater than the resistance that results from known methods of steel structure dimensioning.

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“…The steel truss consisted of C-shaped steel sections connected by self-drilling screws. Roy et al [15] carried out tests and FEA to investigate the effect of deployment patterns of self-drilling screws on the bearing capacity of high-strength CFS joints. Fahmy et al [16] investigated the bearing capacity of five CFS connections assembled using two types of gusset plates and self-tapping screws.…”

Section: Introductionmentioning

confidence: 99%

Bearing Capacity and Failure Mode of a Light-Steel Tubular K-joint Connected by a Novel U-shape Connector

et al. 2021

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This study aims to investigate the ultimate bearing capacity of a novel tubular K-joint used for light-steel structures consisting of thin-walled square hollow section members, a U-shape connector and self-drilling screws, and the effect of three patterns of stamping indentation fabricated on the U-shape connector on the ultimate bearing capacity of the proposed K-joint. Firstly, a total of 12 K-joint specimens were tested to failure under monotonic brace axial compressive loading. Secondly, failure mode and the ultimate bearing capacity of each specimen were investigated and analyzed. Finally, finite element analyses were carried out to study the effect of three key parameters, including chord axial stress ratio, half width-to-thickness ratio of the chord and brace-to-chord wall thickness ratio, on the ultimate bearing capacity of the proposed K-joints using the recommended U-shape connector. It was found that failure mode of the proposed K-joint is governed by both the deformation of the U-shape connector and the chord local plastification. Besides, the K-joint specimen using a U-shape connector with the strip stamping grooves in the horizontal direction generally has a higher bearing capacity and a much smaller connector deformation. Similar to the welded tubular joints, chord axial stresses may also significantly reduce the ultimate bearing capacity of the proposed K-joint.

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Experiments and finite element modelling of screw pattern of self-drilling screw connections for high strength cold-formed steel

Cited by 57 publications

References 8 publications

openVFIFE: An Object-Oriented Structure Analysis Platform Based on Vector Form Intrinsic Finite Element Method

openVFIFE: An Object-Oriented Structure Analysis Platform Based on Vector Form Intrinsic Finite Element Method

Analysis of Failure Mechanism in Joints with Positive Eccentricity in CFS Truss

Bearing Capacity and Failure Mode of a Light-Steel Tubular K-joint Connected by a Novel U-shape Connector

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