Moment capacity of apex brackets of cold-formed steel portal frames

Chen, Xin; Boston, Megan; Bell, Darrin; Mares, Jiri; Roy, Krishanu; Lim, James B.P.

doi:10.1016/j.tws.2023.110574

Cited by 9 publications

(1 citation statement)

References 20 publications

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“…These include: • solid fasteners (such as in Model C), but integrated into the model using the embedded region (available in the Abaqus software, [107]); • solid elements (cylinders) replacing only the bolt shanks, [108]; • CBUSH element (available in the Nastran software, [109]) that simulates the stiffness of the fastener by defining six directional stiffnesses, i.e. axial stiffness, shear stiffness in planes perpendicular to the fastener axis, and three rotational stiffnesses; • linear translational SPRING2 element (available in the Abaqus software, [110]). Depending on the type of fastener model among those mentioned above and the software in which the bolted joint model is executed, different ways of applying bonds to the fastener model are available.…”

Section: Fe-based Fastener Modelsmentioning

confidence: 99%

Modern Methods for Modelling Bolted Joints at the Assembly Stage – A Systematic Review

Grzejda

2023

Engineering World

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The main aim of the paper is to catalog ways of modeling bolted joints and introducing bolt preload using the finite element method. The paper presents models of bolted joints published in the current decade (i.e. after 1 January 2021 and up to 10 May 2023) in journals of the world's largest scientific publishers, such as: Elsevier, Springer, and MDPI, among others. Reporting of the systematic review was carried out based on PRISMA guidelines. The databases were searched with the EBSCO multi-search engine for the following keywords: bolted joint model, bolted connection model, preload, and finite element method. Additionally, the search results were narrowed down to peer-reviewed papers from the discipline of engineering and written in English. This yielded 2,712 records for further analysis. After removing duplicates from this group, screening was carried out, based on which 1,476 records were excluded from the study. For the remaining group of reports, an eligibility assessment was performed, after which a further 210 reports were excluded from the study. Finally, 86 papers were included in the review. As a result of their examination, six groups of simplified fastener models currently used in the modeling of bolted joints at the assembly stage were described.

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Section: Fe-based Fastener Modelsmentioning

confidence: 99%

Modern Methods for Modelling Bolted Joints at the Assembly Stage – A Systematic Review

Grzejda

2023

Engineering World

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Numerical Modelling of Side-Plate Connection for Cold-Formed Steel Nested Tapered Box Beam Portal Frame

Paul,

Roy,

Ghosh

et al. 2024

Lecture Notes in Civil Engineering

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Moment Capacity of Bolted-Side Plate for the Eaves Joint of Nested Tapered Box Beam Portal Frame

Paul,

Roy,

Fang

et al. 2024

Int J Steel Struct

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The joints of cold-formed steel (CFS) portal frames with box sections are primarily formed either through stiffened welded connections or by bolted end plates, which typically involve costly full penetration butt welds. In New Zealand, CFS portal frames with nested tapered box beam (NTBB) sections are popular, and the joints of these portal frames are also formed through a bolted end plate system. In literature, it was found that welds in these joints are prone to cracking in the heat-affected zone (HAZ) under bearing opening moments (tension). Therefore, this paper focuses on proposing an alternative connection system (bolted-side plate) for eaves joints without any weld, aiming to reduce the overall cost of construction and increase construction speed. The performance (strength and stiffness) of these joints is mainly dependent on the geometric details of the bolted-side plate, which is limited in Australia/New Zealand standards (AS/NZ 4600). Herein, a non-linear finite element (FE) model was developed for the NTBB portal frame and validated against the experimental test results from the literature. Firstly, the validated FE model was used to investigate the feasibility of using bolted-side plates for NTBB portal frames and found that the bolted-side plate can increase the ultimate capacity of NTBB portal frame by 9%. A parametric study was then conducted by considering different geometric details of the bolted-side plates under both closing (gravity) and opening (wind uplift) moments. Finally, unified design equations for the moment capacity of bolted-side plates were proposed based on the results of the parametric study, and their accuracy was assessed through reliability analysis.

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Moment capacity of apex brackets of cold-formed steel portal frames

Cited by 9 publications

References 20 publications

Modern Methods for Modelling Bolted Joints at the Assembly Stage – A Systematic Review

Modern Methods for Modelling Bolted Joints at the Assembly Stage – A Systematic Review

Numerical Modelling of Side-Plate Connection for Cold-Formed Steel Nested Tapered Box Beam Portal Frame

Moment Capacity of Bolted-Side Plate for the Eaves Joint of Nested Tapered Box Beam Portal Frame

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