Deformation capacity of steel structures

Kato, Ben

doi:10.1016/0143-974x(90)90024-b

Cited by 54 publications

(25 citation statements)

References 3 publications

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“…for a heated beam at the fire member section (ideal double flange section) and σ-ε relationships (bi-liner model) have been used by referring with the past study [2].…”

Section: A Theoretical Fire Response Analysismentioning

confidence: 99%

“…A yield ratio of the steel, which is given by a ratio of a yield point to a tensile strength at ambient temperature, is one of the most important mechanical property to estimate the plastic deformation capacity. When applying the low yield ratio steel for the steel member, plastic region in the member is widely extended [2]. This contributes to avoiding strain concentration in the member and delaying local buckling or ductile cracks at severe earthquake events.…”

Section: Introductionmentioning

confidence: 99%

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A study on a theoretical relationship between strain hardening of steel and plastic region length in a steel beam subjected to fire

Ozaki

2014

Stahlbau

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Climate change, unseasonal fire and urbanization are contributing to the decline of Pinus caribaea var. bahamensis populations in the Turks and Caicos Islands (TCI). Infestation of pines with the invasive pine tortoise scale (PTS, Toumeyella parvicornis) is accelerating this decline. Pine trees in the Bahamas are larger and healthier and are not infested with PTS although they are subject to some of the same environmental pressures as the trees in TCI. Volatile compounds were collected from wild and nursery‐reared P. caribaea var. bahamensis from TCI and the Bahamas and characterized using GC/MS analysis, to look for differences between the compounds detected in insect‐infested pines of TCI and the healthy pines of the Bahamas. Ten compounds contributing at least 1% of the total detected peak areas in any one of the samples were selected for further study. Eight of these compounds were identified using authentic standards and mass spectral libraries. The main constituents in the samples were α‐ and β‐pinene as well as β‐phellandrene, and, together with β‐myrcene, their contents varied the most between samples collected at different locations. Principal‐component analysis showed that the two structural isomers of pinene, together with β‐myrcene and β‐phellandrene, contributed 98.4% of the variance between samples. There was a positive relationship between the concentrations of the two structural isomers of pinene and between levels of β‐myrcene and β‐phellandrene. The results are discussed in relation to the biology and adaptations of invasive scale insects, the importance of monoterpenes in pine as a defense against insect predation, whether these compounds can be used as indicators of tree health, and future directions for research into conserving the Caicos pine.

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“…for a heated beam at the fire member section (ideal double flange section) and σ-ε relationships (bi-liner model) have been used by referring with the past study [2].…”

Section: A Theoretical Fire Response Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A study on a theoretical relationship between strain hardening of steel and plastic region length in a steel beam subjected to fire

Ozaki

2014

Stahlbau

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“…The regression analysis design method was firstly proposed by Kato [18,41] while examining the flange-web interaction and the material strain hardening influence on the rotation capacity response. Through regression analysis of available test data on stub columns, it was proposed a semi-empiric design method to determine the normalised local b u c kl i n g s tr e n g th i n te r m s of th e 0.2 LB r a ti o , u p on w h i ch t o b a s e r ota ti on c a p a ci ty predictions.…”

Section: The Regression Analysis Design Methodsmentioning

confidence: 99%

Effective width equations accounting for element interaction for cold-formed stainless steel square and rectangular hollow sections

Bock

Real

2015

Structures

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Rectangular hollow sections featuring high height-to-width (aspect) ratios have shown to offer improved ultimate capacity due to the effects of the interaction between the elements within the cross-section which are particularly significant for slender cross-sections (class 4) undergoing local buckling. The European design rules dealing with stainless steel, EN 1993-1-4 [1], utilises the concept of cross-section classification and the effective width method for the design of slender cross-sections susceptible to local buckling neglecting such interaction effects, hence resulting in conservative predictions. This paper examines the benefits of element interaction effects on cold-formed ferritic stainless steel compressed sections on the basis of carefully validated finite element models. Following parametric studies, the applicability of various alternative design approaches accounting for element interaction to ferritic stainless steel is assessed and effective width curves, as well as a Class 3 limiting slenderness equation, are derived herein as an explicit function of the aspect ratio. Comparisons with the loads achieved in the FE models have shown that the proposed effective width equations allowing for the benefits of element interaction improve capacity predictions making design more cost-effective. Highlights:Numerical modelling of cold-formed ferritic stainless steel stub columns. Study of the influence of some key parameters on the numerical response. Successful validation of the scope of various methods to cover ferritic steel. Incorporation of element interaction effects into the effective width formulation. Reliability analysis and validation of the proposed method against existing tests.

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“…The initial slope method is generally only used for tri-linear representations of material behaviour ( [10], [11]) and assumes a constant value of E sh based on the initial post-yield tangent slope taken at sh (see Fig. 1).…”

Section: Methods To Calculate the Strain-hardening Modulusmentioning

confidence: 99%

Practical strain-hardening material properties for use in deformation-based structural steel design

Foster¹,

Gardner

Wang³

2015

Thin-Walled Structures

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Through the development of an innovative full cross-section tensile testing method, a programme of experiments was conducted to investigate the influence of average cross-section properties on the constitutive relationships for carbon steel, to validate the use of an elastic linear hardening model in practical design, and to assess the resulting accuracy enhancements to the new deformation-based Continuous Strength Method (CSM) of structural steel design. A total of seventeen full cross-section tensile tests on hot-rolled I-sections, hollow sections and cold-formed hollow sections were performed and these were compared with coupon test data obtained from a supplementary programme of fourteen tensile coupon tests and data carefully obtained from the literature. The overall behavioural response of the crosssection tensile tests demonstrated that assuming an elastic, linear hardening material model for the CSM is a reasonable assumption and the previous assumption concerning the magnitude of the strain-hardening modulus, based upon the recommendations of EN 1993-1-5, is overly-conservative. A revised suite of material models was presented and was shown to furnish the CSM capacity equations with a higher degree of accuracy when compared against experimental data.

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Deformation capacity of steel structures

Cited by 54 publications

References 3 publications

A study on a theoretical relationship between strain hardening of steel and plastic region length in a steel beam subjected to fire

A study on a theoretical relationship between strain hardening of steel and plastic region length in a steel beam subjected to fire

Effective width equations accounting for element interaction for cold-formed stainless steel square and rectangular hollow sections

Practical strain-hardening material properties for use in deformation-based structural steel design

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