Section moment capacity design rules for rivet fastened rectangular hollow flange channel beams

Siahaan, Ropalin, Poologanathan, Keerthan and Mahendran, Mahen (2018) Section moment capacity design rules for rivet fastened rectangular hollow flange channel beams. Thin-Walled Structures, 127. pp. 781-797. ISSN 0263-8231

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The rivet fastened Rectangular Hollow Flange Channel Beam (RHFCB) is a new type of cold-formed steel section, made of two torsionally rigid rectangular hollow flanges, connected to a web via intermittent rivet fastening. The hollow flanges and the absence of free edges in the RHFCB contribute to improved structural performance. The structural behaviour of the RHFCB is unique compared to other conventional cold-formed steel sections and its moment capacity reduces with increasing rivet spacing. The current cold-formed steel design standards do not provide a calculation method to include the effects of intermittent fastening. In this research an extensive parametric study was conducted using validated finite element models to investigate the section moment capacity of RHFCBs. This paper presents the findings from the parametric study and proposes new design equations for the section moment capacity of RHFCBs in the Direct Strength Method format. The parametric study considers various slenderness regions, section dimensions and rivet spacing. In the new design equations, a reduction factor parameter is included to calculate the section moment capacity of RHFCBs at any rivet spacing up to 200 mm. Optimum rivet spacing was also recommended for RHFCBs.

Item Type: Article
Uncontrolled Keywords: Hollow flange beams; Cold-formed steel structures; Rivet fastening; Section moment capacity; Direct strength method; Finite element analyses; Design rules; Local buckling
Subjects: H200 Civil Engineering
K200 Building
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Paul Burns
Date Deposited: 22 Nov 2018 11:27
Last Modified: 11 Oct 2019 18:30

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