Flexural behaviour of stainless steel oval hollow sections

et al. 2015

In parallel with the experimental study described in the companion paper [1], a numerical modelling programme has been carried out to investigate further the structural behaviour of stainless steel cross-sections under combined loading. The numerical models, which were developed using the finite element (FE) package ABAQUS, were initially validated against the experiments, showing the capability of the FE models to replicate the key test results, the full experimental load-deformation histories and the observed local buckling failure modes.Upon validation of the FE models, parametric studies were conducted to generate additional structural performance data over a wide range of cross-section slenderness and combinations

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Section: Basic Modelling Assumptionsmentioning

confidence: 99%

Behaviour of structural stainless steel cross-sections under combined loading – Part II: Numerical modelling and design approach

Zhao

Rossi

et al. 2015

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“…Stub column tests on different cross-section classes have been carried out to study the compressive response and local buckling behaviour of austenitic [9][10][11][12][13][14] and duplex [15,16] stainless steel cross-sections. Three-point and four-point bending tests have been performed to investigate the flexural response and rotation capacity of austenitic [17][18][19][20][21] and duplex [22,23] stainless steel beams under a moment gradient and constant moment, respectively. On the basis of the findings, revised slenderness limits for cross-section classification [24] and new effective width formulae for slender sections [15] have been proposed.…”

Section: Introductionmentioning

confidence: 99%

Behaviour of structural stainless steel cross-sections under combined loading – Part I: Experimental study

Zhao

Rossi

et al. 2015

121

Stainless steel has been gaining increasing use in a variety of engineering applications due to its unique combination of mechanical properties, durability and aesthetics. Significant progress in the development of structural design guidance has been made in recent years, underpinned by sound research. However, an area that has remained relatively unexplored is that of combined loading. Testing and analysis of stainless steel cross-sections under combined axial load and bending is therefore the subject of the present paper and the companion paper [1]. The experimental programme covers both austenitic and duplex stainless steels, and five cross-section sizes including three square hollow sections (SHS) and two rectangular hollow sections (RHS). In total, five stub column tests, five four-point bending tests, 20 uniaxial bending plus compression tests and four biaxial bending plus compression tests were carried out to investigate the cross-sectional behaviour of stainless steel tubular sections under combined loading. The initial loading eccentricities for the Zhao, O., Rossi, B., Gardner, L., & Young, B. (2015). Behaviour of structural stainless steel cross-sections under combined loading -Part I: Experimental study. Engineering Structures, 89, 236-246. Improved design rules for stainless steel cross-sections under combined loading are also sought through extension of the deformation-based Continuous Strength Method (CSM).

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“…It can be seen from Table 3 [27][28][29][30][31]. This behaviour was explained by the fact that local buckling is delayed in the presence of a moment gradient due to the restraint that the most heavily loaded cross-section experiences from the adjacent material which is at a lower stress level.…”

Section: Comparison Between Three-point and Four-point Bending Testsmentioning

confidence: 99%

“…[ 28], who found that both the ultimate moment capacity and rotation capacity are improved in the presence of a moment gradient, as compared to uniform bending. However, most of the test moments in this study did not drop back below M pl due to large deformations and premature fracture, which prevents meaningful comparisons of rotation capacity.…”

Section: Comparison Between Three-point and Four-point Bending Testsmentioning

confidence: 99%

Deformation-based design of aluminium alloy beams

Young²,

2014