Proposed residual stress model for roller bent steel wide flange sections

Spoorenberg, R.C.; Snijder, H.H.; Hoenderkamp, J.C.D.

doi:10.1016/j.jcsr.2011.01.009

Cited by 21 publications

(21 citation statements)

References 13 publications

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“…Spoorenberg et al [23] have recently carried out an experimental program focusing on the residual stresses due to cold bending on such sections. Using the sectioning method for their measurements, they validated their method by comparing measurements of residual stresses in straight members with the theoretical thermal stresses and reproduced the same method on members after curving.…”

Section: Residual Stresses Due To Cold Bendingmentioning

confidence: 99%

“…Spoorenberg et al [23] have recently proposed a residual stress pattern especially developed for cold bent wide flange sections. This pattern is based on strong evidence, since the results of detailed experimental [21] and computational [22] studies were combined and included in the proposed residual stress model [23]. However, no studies on the influence of this well defined residual stress model have been performed to evaluate the effects of cold bending in such members.…”

Section: Introductionmentioning

confidence: 99%

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Influence of cold bending on the resistance of wide flange members

Hadjioannou

Douthe²,

Gantes

2013

Int J Steel Struct

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Cold roller bending is commonly used for bending straight members with hot rolled wide-flange sections to create arches. This process induces plastic deformations along the member, so that it can acquire the desired curvature. The resulting residual stress distribution is different from the wellknown residual stress pattern due to hot rolling. Extensive studies have shown that the influence of residual stresses due to hot rolling on the resistance of wide-flange steel sections is non negligible. On the contrary, the residual stress pattern due to roller bending has been only recently clearly identified and its effects on the elasto-plastic behavior of curved members have not been studied sufficiently. Thus, in this paper the influence of such residual stresses on the resistance of both wideflange sections and corresponding arch members is investigated in detail. Taking into consideration the residual stress pattern due to cold bending, interaction diagrams are developed for combined axial load and bending moment, as well as buckling curves for cold bent steel arches. The results are quantified and compared with those for hot-rolled and stress free members. This will allow designers to appreciate the available margins of safety when using standard residual stress pattern for cold bent members. Furthermore, the results suggest the necessity for the development of buckling curves for curved members including initial imperfections.

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Section: Residual Stresses Due To Cold Bendingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of cold bending on the resistance of wide flange members

Hadjioannou

Douthe²,

Gantes

2013

Int J Steel Struct

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“…The residual stress model proposed by Spoorenberg et al [20] is used to define the initial stress state in the roller bent steel member prior to loading (Fig. 5(a)).…”

Section: Residual Stressesmentioning

confidence: 99%

Design rules for out-of-plane stability of roller bent steel arches with FEM

Spoorenberg

Snijder

Hoenderkamp

et al. 2012

Journal of Constructional Steel Research

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Keywords:Roller bent arch Out-of-plane buckling Finite element modeling Design rules This paper describes a numerical investigation into the out-of-plane buckling behavior of freestanding roller bent steel arches. As roller bent arches have structural imperfections which differ considerably from those of hot-rolled or welded sections, specific attention is paid to their inclusion in the numerical model. Sensitivity analyses are performed to assess the influence of the imperfections due to roller bending on the out-of-plane buckling response. The accuracy of the finite element model is checked by comparing the results with earlier performed experiments as presented in a related paper. The finite element model is able to replicate the structural behavior displayed by the experiments with good accuracy. A database is created with elasticplastic buckling loads for a large number of freestanding roller bent arches. The numerical data is analyzed and presented in a so-called imperfection parameter diagram from which imperfection parameter curves are derived. The imperfection parameter curves are substituted into the European column curve formulation, leaving the original column curve formulation unaffected but extending its applicability to the out-of-plane buckling response of roller bent arches. The column curve with proposed imperfection parameter expressions can be used to check the out-of-plane buckling response of a roller bent steel arch with known non-dimensional slenderness.

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“…The obtained residual stress distribution differed significantly from Timoshenko's distribution, exhibiting stress concentration at the web-to-flange junctions. Detailed finite element simulations of the curving process followed next [20] in order to validate the developed numerical models with experimental results; an analytical model predicting the residual stress of wide flange sections subjected to bending was proposed in [21]. Another computational study concerning roller bent rectangular hollow sections has been performed in [22], where the full interaction between the bending machine and the work pieces was modeled and a numerical parametric study was carried out;…”

Section: Introductionmentioning

confidence: 99%

Influence of roller-bending on RHS steel arches: Experimental and numerical investigation

Thanasoulas

Douthe

Gantes

et al. 2018

Thin-Walled Structures

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An experimental and numerical investigation of the influence of residual stresses due to curving in rectangular hollow section steel arches on the overall structural behaviour is presented. Twelve circular arch specimens, grouped in two sets of curvatures, are tested under tension and compression loading. Detailed finite element models are used to simulate in detail the curving procedure as well as the experimental tests and implicit static analyses accounting for geometric and material nonlinearities are carried out. Experimental and numerical results are compared in terms of load-displacement equilibrium paths, strain-gauge measurements and deformed shapes. Overall, a quite good quantitative and qualitative agreement is achieved between FEA and experimental results, demonstrating the capability of the developed finite element models to reliably estimate the residual stress distribution caused by the forming process. The numerically estimated residual stresses are presented for the two sets of specimens, providing good agreement with the models proposed in the literature. Extended plastification at the bottom flange edges of the arches is observed, reducing significantly the member's remaining ductility; the developed accumulated plastic strains are found to be remarkably larger than the longitudinal strains that are expected according to the classic beam theory. Maximum discrepancies of approximately 10% are reported in the structural response of the arches depending on whether the estimated locked-in stress distributions are taken into account or not.

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Proposed residual stress model for roller bent steel wide flange sections

Cited by 21 publications

References 13 publications

Influence of cold bending on the resistance of wide flange members

Influence of cold bending on the resistance of wide flange members

Design rules for out-of-plane stability of roller bent steel arches with FEM

Influence of roller-bending on RHS steel arches: Experimental and numerical investigation

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