Design of prestressed cold-formed steel beams

Hadjipantelis, Nicolas; Gardner, Leroy

doi:10.1016/j.tws.2019.02.029

Cited by 14 publications

(10 citation statements)

References 23 publications

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“…The design equations have been reported by Hadjipantelis et al 51 ; in the same study, the reliability and practical implementation of the design recommendations are also demonstrated. In summary, the cold-formed steel beam is designed as a beam-column member using linear interaction equations, which account for the combination of compressive and bending actions, in conjunction with the Direct Strength Method 52,53 , which is used to predict the capacity of the steel member under pure axial compression, negative bending and positive bending.…”

Section: Prestressed Beamssupporting

confidence: 64%

“…Overall, Hadjipantelis et al 50 reported ultimate moment capacity enhancements of up to 40% and decreases in the overall downwards deflections approaching 60%. Prestressed cold-formed steel beams can be designed by adapting existing design methods, as established by Hadjipantelis et al 51 In the proposed design method, the load-carrying capacities of both the steel beam and the cable need to be checked at each of the two loading stages independently. In Stage 1, the beam is subjected to combined axial compression and negative (hogging) bending, both actions due to the prestressing, while in Stage 2 it is subjected to combined axial compression and positive (sagging) bending, due to the prestressing and gravity loading.…”

Section: Prestressed Beamsmentioning

confidence: 99%

“…The majority of the above considerations are studied below; more detailed analyses have been provided by Hadjipantelis et al 49,51 for issues regarding the prestressing and by Kyvelou et al 12,25,27 for issues regarding the composite action.…”

Section: Structural Behaviour and Interactionsmentioning

confidence: 99%

See 2 more Smart Citations

The Evolving Basis for the Design of Light Gauge Steel Systems

Kyvelou

Nethercot

Hadjipantelis

et al. 2020

Int. J. Str. Stab. Dyn.

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The importance of allowing for the many different types of structural interaction that have an effect on the performance of light gauge members when used in practical situations is emphasized. A distinction is drawn between internal interactions involving the various plate elements of the steel profiles and external interactions involving the other components in the system. Although full-scale testing of representative systems can capture this behavior, the costs involved make this an impractical general basis for design; codified methods generally consider only isolated plates within members and isolated members within systems, thereby neglecting the potentially beneficial effects of both forms of interaction. Properly used, modern methods of numerical analysis offer the potential to systematically allow for both forms of interaction — provided the numerical models used have been adequately validated against suitable tests. The use of such an approach is explained and illustrated for three commonly used structural systems: roof purlins, floor beams, and columns in stud walls. In each case, it is shown that, provided sufficient care is taken, the numerical approach can yield accurate predictions of the observed test behavior. The subsequently generated large portfolio of numerical results can then provide clear insights into the exact nature of the various interactions and, thus, form the basis for more realistic design approaches that are both more accurate in their predictions and which lead to more economic designs. Building on this, modifying existing arrangements so as to yield superior performance through specific modifications is now possible. Two such examples, one in which improved interconnection between the components in a system is investigated and a second in which prestressing is shown to provide substantial enhancement for relatively small and simple changes, are presented.

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Section: Prestressed Beamssupporting

confidence: 64%

Section: Prestressed Beamsmentioning

confidence: 99%

See 1 more Smart Citation

The Evolving Basis for the Design of Light Gauge Steel Systems

Kyvelou

Nethercot

Hadjipantelis

et al. 2020

Int. J. Str. Stab. Dyn.

Self Cite

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“…However, the control of raw material quality in this small-medium enterprise is still low, that the use of raw materials is still below the smallest standardized thickness, as a result, the resulting profile is relatively less rigid and below the predetermined standard. The improved rigidity of the lightweight steel profile can be done by modifying web forms and addition folds at the end of lips flanges [8][9][10][11][12][13][14][15][16]. The strength of a structure is determined by the stiffness and flexibility of the beams.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis in Development of a Cross-Sectional Model of the “C” Profile Cold-Formed Steel SNI-1729:2015

Sugiharto¹,

Santoso²,

Hartono³

et al. 2021

Advances in Social Science, Education and Humanities Research

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Lightweight structural steel profiles are often called cold-formed steel profiles-steels are formed by means of cold rolling of thin steel sheet so that the mass of steel profiles are extremely light. Because it has a thin plate thickness and mass of very light steel profile lateral stiffness is relatively low and is determined by the shape of the cross-section profile. This paper will discuss the development of a cross-sectional model of profile "C" size of 70 mm in the cold-forming steel SNI 1729:2015 is done numerically with the help of software. The analysis was carried out on the cross-sectional shape of the SNI 1729:2015 standard and the results of the development of the cross-sectional shape. The analysis was conducted by reviewing the deflection that occurs in the lateral direction on rod dimensions and the same type of loading. Results of the analysis show that in the cross-sectional shape of the development results there is a decrease in the lateral deflection, this shows that there is an increase in the lateral stiffness of the lightweight steel structure profile after the development of the cross-sectional model.

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“…The concept of prestressing steel structures was first investigated by Magnel [3], who suggested that considerable material and therefore cost savings can be achieved from the utilization of prestressed high-strength steel cables in conjunction with structural mild steel members. Subsequent research has focused on prestressed hot-rolled [4,5,6,7] and cold-formed [8,9,10] steel beams, stayed columns [11,12,13,14,15], trusses [16,17,18,19] and stressed-arch frames [20,21].…”

Section: Introductionmentioning

confidence: 99%