Simplified analysis method for catenary action of restrained cellular steel beams at elevated temperature considering strain reversal

Zhang, Lulu; Wang, Peijun

doi:10.1016/j.firesaf.2017.11.009

Cited by 11 publications

(3 citation statements)

References 34 publications

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“…, 2007), the lateral torsional buckling behaviour of steel beams(Real et al. , 2007), the behaviour of axially and rotationally restrained cold-formed steel beams(Laim and Rodrigues, 2016), the catenary action of cellular steel beams(Zhang and Wang, 2018), and the shear effect and local instability effect on the steel beam (Kodur and Naser, 2014, 2015). The behaviours of steel beams under various load and boundary conditions were analysed based on the finite element methods using the beam element, shell element, and solid element, taking into account material and geometrical nonlinear effects.…”

Section: Introductionmentioning

confidence: 99%

“…Many studies have been conducted on the analytical examination of steel members and frames during fire. For steel beam, for instance, previous studies have clarified the elastoplastic behaviour of steel beams (Burgess et al, 1988) and that of an axially restrained steel beam (Guoqiang et al, 2007), the lateral torsional buckling behaviour of steel beams (Real et al, 2007), the behaviour of axially and rotationally restrained cold-formed steel beams (Laim and Rodrigues, 2016), the catenary action of cellular steel beams (Zhang and Wang, 2018), and the shear effect and local instability effect on the steel beam Naser, 2014, 2015). The behaviours of steel beams under various load and boundary conditions were analysed based on the finite element methods using the beam element, shell element, and solid element, taking into account material and geometrical nonlinear effects.…”

Section: Introductionmentioning

confidence: 99%

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Proposal of steel stress-strain relationships and simple analytical models of beams considering strain-rate effects at elevated temperatures

Ozaki

Umemura

2022

JSFE

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PurposeIn this study, engineering stress-strain relationships considering an effect of strain rate on steel materials at elevated temperatures were formulated and a simplified analytical model using a two-dimensional beam element to analytically examine the effect of strain rate on the load-bearing capacity and collapse temperature was proposed.Design/methodology/approachThe stress-strain relationships taking into account temperature, strain, and strain rate were established based on the past coupon test results with strain rate as the test parameter. Furthermore, an elasto-plastic analysis using a two-dimensional beam element, which considered the effect on strain rate, was conducted for both transient- and steady-state conditions.FindingsThe analytical results agreed relatively well with the test results, which used small steel beam specimens with a rectangular cross-section under various heating rates (transient-state condition) and deformation rates (steady-state condition). It was found that the bending strength and collapse temperature obtained from the parametric analyses agreed relatively well with those evaluated using the effective strength obtained from the coupon tests with strain equal to 0.01 or 0.02 under the fast strain rates.Originality/valueThe effect of stress degradation, including the stress-strain relationships at elevated temperature, was mitigated by considering the effect of strain rate on the analytical model. This is an important point to consider when considering the effect of strain rate on steel structural analysis at elevated temperatures to maintain analytical stability unaccompanied by the stress degradation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Proposal of steel stress-strain relationships and simple analytical models of beams considering strain-rate effects at elevated temperatures

Ozaki

Umemura

2022

JSFE

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“…The shape of web openings can also be variated, depending on its function and aesthetic considerations. Shapes existing currently are circular [6], cellular [7], or even sinusoidal shapes [8].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis on stress and displacement of tapered cantilever castellated steel beam with circular openings

et al. 2018

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Abstract. Castellated steel beams are made from normal steel beams cut into half with certain pattern and re-jointed to increase its height. This action results in many shapes of openings in its web, one of them being circular. Circular openings of castellated beams can also be implemented with single fix supported structures, but if uniform shape is used, it will reduce its effectiveness. In this paper, adoption of tapered shape on castellated beams with circular openings as cantilever structures will be discussed. This study uses 150x75x5x7 and 200x100x5.5x8 IWF sections with variations of opening diameters, opening spaces, and span lengths. The steel has a yield strength of 400 MPa and the analysis runs with solid element 10-node tetrahedron using the finite element method, by observing Von Mises stress and displacement. Free-licenced software such as LISAFEA 8.0 and FreeCAD are utilized for analysing and drawing solid elements. The result shows that the optimum height of IWF section for 150x75x5x7 is 230 mm and for 200x100x5.5x8 is 318 mm between span lengths of 2 m to 3.5 m. It can be concluded that each of the span lengths has various optimum diameters and opening spaces to acquire the smallest stress and displacement.

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Experimental and Numerical Analysis on Full High Strength Steel Extended Endplate Connections in Fire

Qiang

Jiang

et al. 2018

Int J Steel Struct

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Simplified analysis method for catenary action of restrained cellular steel beams at elevated temperature considering strain reversal

Cited by 11 publications

References 34 publications

Proposal of steel stress-strain relationships and simple analytical models of beams considering strain-rate effects at elevated temperatures

Proposal of steel stress-strain relationships and simple analytical models of beams considering strain-rate effects at elevated temperatures

Numerical analysis on stress and displacement of tapered cantilever castellated steel beam with circular openings

Experimental and Numerical Analysis on Full High Strength Steel Extended Endplate Connections in Fire

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