DSM design of fixed-ended slender built-up back-to-back cold-formed steel compression members

Vy, Son Tung; Mahendran, Mahen

doi:10.1016/j.jcsr.2021.107053

Cited by 22 publications

(10 citation statements)

References 23 publications

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“…The validation of the design spreadsheet was performed by comparing the independently calculated theoretical results with the reported experimental, numerical, and theoretical results collected from previous research. The research data of Ting et al [6] and Roy et al [7] and Vy and Mahendran [8] were used for data validation, and the results are shown in Figure 4. The axial capacity estimation performance of the design spreadsheet is accurate and conservative since the results were close to the research results claimed by Ting et al [6] and Roy et al [7], and Vy and Mahendran [8].…”

Section: Preliminary Design Toolmentioning

confidence: 99%

“…The research data of Ting et al [6] and Roy et al [7] and Vy and Mahendran [8] were used for data validation, and the results are shown in Figure 4. The axial capacity estimation performance of the design spreadsheet is accurate and conservative since the results were close to the research results claimed by Ting et al [6] and Roy et al [7], and Vy and Mahendran [8]. The mean value of PTheo/PExp of EWM and DSM is 0.92 and 0.95 with the corresponding coefficient of variation (COV) of 0.19 and 0.21, respectively.…”

Section: Preliminary Design Toolmentioning

confidence: 99%

“…As CFS sections typically have a high width-to-thickness ratio, a single CFS section could not achieve high load-carrying capacity and long span length. Ting et al [6], Roy et al [7], Vy and Mahendran [8], Lu et al [9], Li and Young [10], Nie et al [11], Kherbouche and Megnounif [12], Roy et al [13], Anbarasu and Dar [14], Mahar et al [15] and Sang et al [16] studied various types of CFS built-up sections to improve the performance of CFS structures. The built-up sections are formed by using the mechanical fasteners or welds to connect two or more CFS sections along the length of the member with various spacings.…”

Section: Introductionmentioning

confidence: 99%

“…The capacity of the CFS built-up sections is commonly determined by using the Effective Width Method (EWM) and Direct Strength Method (DSM) as codified in AISI S100-16 and AS/NZS 4600:2018 [8,[17][18]. EWM determines the capacity of the CFS sections based on the reduced effective area, which varies with the unit stress applied and width-to-thickness ratio.…”

Section: Introductionmentioning

confidence: 99%

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A Surrogate Model to Estimate the Axial Compressive Capacity of Cold-Formed Steel Open Built-Up Sections

2022

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This paper proposed a surrogate model to simplify the process of estimating the axial compressive capacity of cold-formed steel (CFS) open built-up sections composed of lipped channels with different section sizes, thickness, length, and connector spacing. The surrogate model was developed based on the current design methods, i.e., the Effective Width Method (EWM) and Direct Strength Method (DSM), which are codified in the North American Specification AISI S100-16. This new model features two surface regression equations with a boundary inequality criteria, anchored on two important parameters, i.e., modified slenderness ratio, (KL/r)m and minimum thickness-to-width ratio (t/w)min of the built-up sections. The model was validated with 1089 sets of the experimental results data collected from previous research tested on the axial capacity of CFS open built-up sections with the different design configurations. The proposed surrogate model is aimed to simplify the design process among practising engineers for a quick preliminary calculation of the axial compressive capacity of these new CFS open built-up sections.

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Section: Preliminary Design Toolmentioning

confidence: 99%

Section: Preliminary Design Toolmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Surrogate Model to Estimate the Axial Compressive Capacity of Cold-Formed Steel Open Built-Up Sections

2022

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“…The bottom connector was fixed to a frame bottom beam or concrete strong floor, while the top connector was fixed to a load cell attached to a hydraulic jack. The further details of test set-up have been shown in paper [10] of the authors.…”

Section: Test Set-upmentioning

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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Preliminary Study on Built-Up Back-To-Back Cold-Formed Steel Stub Column Filled with Washed Bottom Ash Concrete

Muftah,

Sani,

Nindyawati

2024

Advanced Structured Materials

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DSM design of fixed-ended slender built-up back-to-back cold-formed steel compression members

Cited by 22 publications

References 23 publications

A Surrogate Model to Estimate the Axial Compressive Capacity of Cold-Formed Steel Open Built-Up Sections

A Surrogate Model to Estimate the Axial Compressive Capacity of Cold-Formed Steel Open Built-Up Sections

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

Preliminary Study on Built-Up Back-To-Back Cold-Formed Steel Stub Column Filled with Washed Bottom Ash Concrete

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