An equivalent stiffness approach for modelling the behaviour of compression members according to Eurocode 3

Barszcz, A.; Giżejowski, M.

doi:10.1016/j.jcsr.2006.03.003

Cited by 11 publications

(20 citation statements)

References 5 publications

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“…Using the refined plastic hinge approach [13], Landesmann and Batista [16] derived stiffness reduction expressions using the European column buckling curves in lieu of the LRFD column buckling curve. Barszcz and Gizejowski [17] proposed theoretical models for compression members using the European buckling curves to determine different stiffness reduction expressions for axial and flexural stiffness as functions of member non-dimensional slenderness. Finally, Zubydan [18,19] proposed stiffness reduction functions to capture the development of plasticity at cross-sectional level.…”

Section: Introductionmentioning

confidence: 99%

A stiffness reduction method for the in-plane design of structural steel elements

Kucukler

Gardner

Macorini

2014

Engineering Structures

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Stiffness reduction offers a practical means of considering the detrimental influence of geometrical imperfections, residual stresses and the spread of plasticity in the analysis and design of steel structures. In this paper, a stiffness reduction approach is presented, which utilises Linear Buckling Analysis (LBA) and Geometrically Nonlinear Analysis (GNA) in conjunction with developed stiffness reduction functions for the design of columns and beamcolumns in steel frames. This approach eliminates the need for modelling geometrical imperfections and requires no member buckling checks. For columns, inelastic flexural buckling loads can be obtained using LBA with appropriate stiffness reduction, while GNA with stiffness reduction is required to determine an accurate prediction of beam-column failure. The accuracy and practicality of the proposed method is shown in several examples, including regular and irregular members. For the latter case in particular, it is found that the proposed approach provides more accurate capacity predictions than traditional design methods, when compared to results generated by means of nonlinear finite element modelling.

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Section: Introductionmentioning

confidence: 99%

A stiffness reduction method for the in-plane design of structural steel elements

Kucukler

Gardner

Macorini

2014

Engineering Structures

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“…Modelling techniques based on the Murzewski-Rankine-Merchant approach (M-R-M approach) for the behaviour prediction of compression members were presented by Barszcz and Gizejowski [26,27] and allowed for reproduction of the buckling curves of real compression members according to the Polish standard [28] and Eurocode 3 [29], respectively. Two approaches were specifi ed, one that uses only the fi rst-order elastic and plastic-strain-hardening mechanisms and the other one that uses all the fi rst-order and second-order elastic and inelastic deformation mechanisms.…”

Section: Force-deformation Characteristic Of a Single Imperfect Strutmentioning

confidence: 99%

“…This approach is utilized hereafter for modelling of the brace force-deformation characteristic of both connected centrically and eccentrically at end joints. Recalling the approach originally developed in [26,27], the characteristic generalized force-deformation relationship of an equivalent truss member of an arbitrary section can be written in the dimensionless format as follows:…”

Section: Force-deformation Characteristic Of a Single Imperfect Strutmentioning

confidence: 99%

“…(2.3) are used for the approximation of second order elastic fl exural deformations while the third term N Te is to be used to approximate the axial stiffness (see a reduction factor ψ in the following section). • Centric compression (refer to [26,27])…”

Section: Elastic Bifurcation Mechanisms -σ Bif Jmentioning

confidence: 99%

“…(2.1), the value of which is a constant dependent on the section type and type of prebuckling deformations, m -parameter for compressed braces (0,5 for axially compressed members [26,27]). …”

Section: Postlimiting Deformation Mechanism -σ Ultmentioning

confidence: 99%

See 2 more Smart Citations

Experimentally Assisted Modelling of the Behaviour of Steel Angle Brace

Barszcz

2014

Archives of Civil Engineering

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Steel frame wind bracing systems are usually made of hot rolled profi les connected to frame elements directly or through a gusset plate. The behaviour of angle bracing members is generally complex since controlled by tension or compression, bending and torsion. The common practice is to transform the problem of complex behaviour into the buckling strength of a truss member. This paper deals with an analytical formulation of the force-deformation characteristic of a single angle brace subjected to compression. A strut model takes into consideration the effect of brace end connections and softening effect of its force-deformation characteristic. Two different boundary conditions, typical for engineering practice, are dealt with. Experimental program of testing the behaviour of angle brace in portal sub-frame specimens is described. Results of experimental investigations are presented. They are used for the validation of developed model. Conclusions are formulated with reference to the application of validated brace model in the analysis of braced steel frameworks.

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13.18: Advanced analysis of braced steel frames: Modelling accounting for the post‐limit behaviour of compressed angle braces

Giżejowski

Barszcz

2017

ce papers

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This paper presents a method of advanced analysis applied to steel plane load bearing systems like trusses as well as unbraced and braced frames. The effects of both material and geometrical nonlinearities on the structural behaviour are studied together with tracing the whole range of truss member behaviour. In the braced frameworks, the truss bracing model accounts for the effect of post-limit behaviour on the inelastic redistribution of forces in frame members. Details of finite element incremental stiffness matrices for frame members and truss bracing members are briefly presented and followed by the discussion how the effects of gradual yielding, buckling and semi-rigid joints are included. The implementation into engineering computer software is summarized and followed by certain aspects of truss and frame structural systems design according to Eurocode 3. A simple two-bar arch truss sensitive to the elastic snap-through buckling for which the closed form solution exists is considered as an example. Simulations of the behaviour of this truss show how the nonlinear behaviour of a single member affects the global instability of the truss. Conclusions are formulated with reference to the application of advanced analysis in direct design of steel braced frameworks.

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An equivalent stiffness approach for modelling the behaviour of compression members according to Eurocode 3

Cited by 11 publications

References 5 publications

A stiffness reduction method for the in-plane design of structural steel elements

A stiffness reduction method for the in-plane design of structural steel elements

Experimentally Assisted Modelling of the Behaviour of Steel Angle Brace

13.18: Advanced analysis of braced steel frames: Modelling accounting for the post‐limit behaviour of compressed angle braces

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