Flexural rigidity of cold-formed steel built-up members

Phan, Dang Khoa; Rasmussen, Kim J.R.

doi:10.1016/j.tws.2019.03.051

Cited by 54 publications

(12 citation statements)

References 7 publications

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“…More recently, Kechidi et al [30] developed a user-defined element including load-deflection curves of a series of screw fasteners, determined from tests, to model the behaviour of coldformed steel built-up columns, while Ye et al [32][33][34][35] successfully replicated the behaviour of built-up beams and bolted connections subjected to monotonic and cyclic loading. Phan and Rasmussen [36] numerically simulated cold-formed steel built-up sections subjected to bending about their minor axis, where the connectors were modelled as nonlinear springs which were assigned force-bearing deformation relationships obtained from single shear tests on bolted joints. Chung and Ip [37] successfully developed nonlinear FE models using three-dimensional solid elements to investigate the structural performance of bolted connections between cold-formed steel strips in shear.…”

Section: P'mentioning

confidence: 99%

“…In this section, the efficiency of the proposed numerical method for modelling cold-formed steel built-up sections is assessed by comparisons against physical tests [36]. An experimental programme, complemented by numerical analyses, was undertaken in [36], in order to investigate the structural behaviour of cold-formed steel built-up beams subjected to minor axis bending. The test specimens, shown in Fig.…”

Section: Built-up Membersmentioning

confidence: 99%

“…Fig. 15 Nominal dimensions (in mm) of built-up beams tested in [36] Three specimens were selected for the validation presented herein, labelled C10010-2R-B55, C10010-4R-BF and C10010-4R-B55, all comprising C10010 cold-formed steel sections connected back-to-back with 2 or 4 rows of bolts (labelled 2R or 4R respectively), with the bolts being finger-tightened or installed using a torque wrench set to a torque of 55 Nm (labelled BF or B55 respectively).…”

Section: Built-up Membersmentioning

confidence: 99%

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A practical numerical model for thin-walled steel connections and built-up members

Quan

Kyvelou

et al. 2022

Structures

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Section: P'mentioning

confidence: 99%

Section: Built-up Membersmentioning

confidence: 99%

Section: Built-up Membersmentioning

confidence: 99%

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A practical numerical model for thin-walled steel connections and built-up members

Quan

Kyvelou

et al. 2022

Structures

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“…In these FE models, the section geometries of specimens were simulated accurately, while the material properties of 0.95 mm thick G550 CFS were based on tensile coupon test results of Rokilan and Mahendran [12]. For NC members, the "hard contact" between section elements were included, while the nonlinear shear behaviour of screw fasteners were incorporated according to the method of Phan and Rasmussen [13,14]. Besides, both local (or distortional) and global imperfections were incorporated in the FE models through the corresponding lowest eigen-buckling modes.…”

Section: Finite Element Modellingmentioning

confidence: 99%

Design of Built‐up Nested Cold‐formed Steel Channel Compression Members

Vy¹,

Mahendran

2021

ce papers

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Recently, the use of built‐up cold‐formed steel (CFS) members in the form of nested channel (NC) compression members is becoming more popular in CFS construction. For NC compression members, the current CFS design standards have been shown to be inadequate, provide over‐conservative predictions, and include some cumbersome design rules relating to maximum allowable screw spacing and end fastener groups. New design guidelines have been proposed by some recent research studies, however, they are based on different assumptions and provide varying capacity predictions. This study has investigated (1) the design guidelines in the current design standards and past research studies, and (2) the effects of screw spacing as well as end fastener groups on the compression behaviour and capacity of NC members. It included a series of compression tests on short, intermediate and slender single channel and NC members, followed by developing validated finite element models and undertaking parametric studies. The results show that: (1) the compression capacity of NC members can be greater than twice that of their individual members, (2) the design rules on the maximum allowable screw spacing and end fastener groups are over‐conservative, and are mostly unnecessary, (3) the design rules in the current standards and past research studies are not suitable for predicting the compression capacities of the investigated NC members, and (4) proposed design guidelines based on the Direct Strength Method in the current CFS design standards can provide reliable predictions for the compression capacities of NC members.

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“…This solution still demands an increased time for manufacturing. Also the rigidity of the beams is less satisfactory as the interest for the in uence of this characteristic represents an attractive research topic [7] .…”

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confidence: 99%

The Effect of Connections on The Global Response of Built-up Cold-formed Steel Beams with Corrugated Webs

Both

Bodea

Ungureanu

2022

Jounarl of Building Design and Environment

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The objective of this paper is to quantify the slippage and rotation in the connections of a double xed corrugated web beam. Two types of connections between the component parts of the built-up beam were used, i.e. MIG brazing and spot welding, which offer different rigidities and bearing capacities for the built-up beams. Experimental tests were conducted on three MIG brazed and two spot welded specimens, respectively. The test setup consisted of a six-point bending con guration which is equivalent to a uniform distributed load applied to the beam. The load was applied from a 500kN actuator through a leverage system that allowed the distribution of the force. An out-of-plane structure prevented the beam from lateral torsional buckling. The testing exhibited relatively large slippage and deformation in the bolted connections and in the supporting device, respectively. However, the high rigidity of the beam maintained the mid-span deflection in the serviceability limit state limits. The built-up corrugated web beams made of cold-formed steel pro les represent an ef cient and suitable structural solution for buildings. Nevertheless, experimental research due to inevitable slippage and the endplate deformation must be performed to characterize the connection.

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Flexural rigidity of cold-formed steel built-up members

Cited by 54 publications

References 7 publications

A practical numerical model for thin-walled steel connections and built-up members

A practical numerical model for thin-walled steel connections and built-up members

Design of Built‐up Nested Cold‐formed Steel Channel Compression Members

The Effect of Connections on The Global Response of Built-up Cold-formed Steel Beams with Corrugated Webs

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